File: C:/Ruby27-x64/share/doc/ruby/html/CSV/Row.html
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<li ><a href="#method-c-new">::new</a>
<li ><a href="#method-i-3C-3C">#<<</a>
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<li ><a href="#method-i-delete">#delete</a>
<li ><a href="#method-i-delete_if">#delete_if</a>
<li ><a href="#method-i-dig">#dig</a>
<li ><a href="#method-i-each">#each</a>
<li ><a href="#method-i-each_pair">#each_pair</a>
<li ><a href="#method-i-fetch">#fetch</a>
<li ><a href="#method-i-field">#field</a>
<li ><a href="#method-i-field-3F">#field?</a>
<li ><a href="#method-i-field_row-3F">#field_row?</a>
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<li ><a href="#method-i-has_key-3F">#has_key?</a>
<li ><a href="#method-i-header-3F">#header?</a>
<li ><a href="#method-i-header_row-3F">#header_row?</a>
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<li class="calls-super" ><a href="#method-i-initialize_copy">#initialize_copy</a>
<li ><a href="#method-i-inspect">#inspect</a>
<li ><a href="#method-i-key-3F">#key?</a>
<li ><a href="#method-i-member-3F">#member?</a>
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<li ><a href="#method-i-to_csv">#to_csv</a>
<li ><a href="#method-i-to_h">#to_h</a>
<li ><a href="#method-i-to_hash">#to_hash</a>
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<main role="main" aria-labelledby="class-CSV::Row">
<h1 id="class-CSV::Row" class="class">
class CSV::Row
</h1>
<section class="description">
<p>A <a href="Row.html"><code>CSV::Row</code></a> is part <a href="../Array.html"><code>Array</code></a> and part <a href="../Hash.html"><code>Hash</code></a>. It retains an order for the fields and allows duplicates just as an <a href="../Array.html"><code>Array</code></a> would, but also allows you to access fields by name just as you could if they were in a <a href="../Hash.html"><code>Hash</code></a>.</p>
<p>All rows returned by <a href="../CSV.html"><code>CSV</code></a> will be constructed from this class, if header row processing is activated.</p>
</section>
<section id="5Buntitled-5D" class="documentation-section">
<section class="attribute-method-details" class="method-section">
<header>
<h3>Attributes</h3>
</header>
<div id="attribute-i-row" class="method-detail">
<div class="method-heading attribute-method-heading">
<span class="method-name">row</span><span
class="attribute-access-type">[R]</span>
</div>
<div class="method-description">
<p>Internal data format used to compare equality.</p>
</div>
</div>
</section>
<section id="public-class-5Buntitled-5D-method-details" class="method-section">
<header>
<h3>Public Class Methods</h3>
</header>
<div id="method-c-new" class="method-detail ">
<div class="method-heading">
<span class="method-name">new</span><span
class="method-args">(headers, fields, header_row = false)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>Constructs a new <a href="Row.html"><code>CSV::Row</code></a> from <code>headers</code> and <code>fields</code>, which are expected to be Arrays. If one <a href="../Array.html"><code>Array</code></a> is shorter than the other, it will be padded with <code>nil</code> objects.</p>
<p>The optional <code>header_row</code> parameter can be set to <code>true</code> to indicate, via <a href="Row.html#method-i-header_row-3F"><code>CSV::Row.header_row?()</code></a> and <a href="Row.html#method-i-field_row-3F"><code>CSV::Row.field_row?()</code></a>, that this is a header row. Otherwise, the row assumes to be a field row.</p>
<p>A <a href="Row.html"><code>CSV::Row</code></a> object supports the following <a href="../Array.html"><code>Array</code></a> methods through delegation:</p>
<ul><li>
<p>empty?()</p>
</li><li>
<p>length()</p>
</li><li>
<p>size()</p>
</li></ul>
<div class="method-source-code" id="new-source">
<pre><span class="ruby-comment"># File lib/csv/row.rb, line 30</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">initialize</span>(<span class="ruby-identifier">headers</span>, <span class="ruby-identifier">fields</span>, <span class="ruby-identifier">header_row</span> = <span class="ruby-keyword">false</span>)
<span class="ruby-ivar">@header_row</span> = <span class="ruby-identifier">header_row</span>
<span class="ruby-identifier">headers</span>.<span class="ruby-identifier">each</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">h</span><span class="ruby-operator">|</span> <span class="ruby-identifier">h</span>.<span class="ruby-identifier">freeze</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">h</span>.<span class="ruby-identifier">is_a?</span> <span class="ruby-constant">String</span> }
<span class="ruby-comment"># handle extra headers or fields</span>
<span class="ruby-ivar">@row</span> = <span class="ruby-keyword">if</span> <span class="ruby-identifier">headers</span>.<span class="ruby-identifier">size</span> <span class="ruby-operator">>=</span> <span class="ruby-identifier">fields</span>.<span class="ruby-identifier">size</span>
<span class="ruby-identifier">headers</span>.<span class="ruby-identifier">zip</span>(<span class="ruby-identifier">fields</span>)
<span class="ruby-keyword">else</span>
<span class="ruby-identifier">fields</span>.<span class="ruby-identifier">zip</span>(<span class="ruby-identifier">headers</span>).<span class="ruby-identifier">each</span>(<span class="ruby-operator">&</span><span class="ruby-value">:reverse!</span>)
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
</section>
<section id="public-instance-5Buntitled-5D-method-details" class="method-section">
<header>
<h3>Public Instance Methods</h3>
</header>
<div id="method-i-3C-3C" class="method-detail ">
<div class="method-heading">
<span class="method-callseq">
<<( field )
</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-heading">
<span class="method-callseq">
<<( header_and_field_array )
</span>
</div>
<div class="method-heading">
<span class="method-callseq">
<<( header_and_field_hash )
</span>
</div>
<div class="method-description">
<p>If a two-element <a href="../Array.html"><code>Array</code></a> is provided, it is assumed to be a header and field and the pair is appended. A <a href="../Hash.html"><code>Hash</code></a> works the same way with the key being the header and the value being the field. Anything else is assumed to be a lone field which is appended with a <code>nil</code> header.</p>
<p>This method returns the row for chaining.</p>
<div class="method-source-code" id="3C-3C-source">
<pre><span class="ruby-comment"># File lib/csv/row.rb, line 181</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title"><<</span>(<span class="ruby-identifier">arg</span>)
<span class="ruby-keyword">if</span> <span class="ruby-identifier">arg</span>.<span class="ruby-identifier">is_a?</span>(<span class="ruby-constant">Array</span>) <span class="ruby-keyword">and</span> <span class="ruby-identifier">arg</span>.<span class="ruby-identifier">size</span> <span class="ruby-operator">==</span> <span class="ruby-value">2</span> <span class="ruby-comment"># appending a header and name</span>
<span class="ruby-ivar">@row</span> <span class="ruby-operator"><<</span> <span class="ruby-identifier">arg</span>
<span class="ruby-keyword">elsif</span> <span class="ruby-identifier">arg</span>.<span class="ruby-identifier">is_a?</span>(<span class="ruby-constant">Hash</span>) <span class="ruby-comment"># append header and name pairs</span>
<span class="ruby-identifier">arg</span>.<span class="ruby-identifier">each</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">pair</span><span class="ruby-operator">|</span> <span class="ruby-ivar">@row</span> <span class="ruby-operator"><<</span> <span class="ruby-identifier">pair</span> }
<span class="ruby-keyword">else</span> <span class="ruby-comment"># append field value</span>
<span class="ruby-ivar">@row</span> <span class="ruby-operator"><<</span> [<span class="ruby-keyword">nil</span>, <span class="ruby-identifier">arg</span>]
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">self</span> <span class="ruby-comment"># for chaining</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-i-3D-3D" class="method-detail ">
<div class="method-heading">
<span class="method-name">==</span><span
class="method-args">(other)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>Returns <code>true</code> if this row contains the same headers and fields in the same order as <code>other</code>.</p>
<div class="method-source-code" id="3D-3D-source">
<pre><span class="ruby-comment"># File lib/csv/row.rb, line 322</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">==</span>(<span class="ruby-identifier">other</span>)
<span class="ruby-keyword">return</span> <span class="ruby-ivar">@row</span> <span class="ruby-operator">==</span> <span class="ruby-identifier">other</span>.<span class="ruby-identifier">row</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">other</span>.<span class="ruby-identifier">is_a?</span> <span class="ruby-constant">CSV</span><span class="ruby-operator">::</span><span class="ruby-constant">Row</span>
<span class="ruby-ivar">@row</span> <span class="ruby-operator">==</span> <span class="ruby-identifier">other</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-i-5B-5D" class="method-detail method-alias">
<div class="method-heading">
<span class="method-name">[]</span><span
class="method-args">(header_or_index, minimum_index = 0)</span>
</div>
<div class="method-description">
</div>
<div class="aliases">
Alias for: <a href="Row.html#method-i-field">field</a>
</div>
</div>
<div id="method-i-5B-5D-3D" class="method-detail ">
<div class="method-heading">
<span class="method-callseq">
[]=( header, value )
</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-heading">
<span class="method-callseq">
[]=( header, offset, value )
</span>
</div>
<div class="method-heading">
<span class="method-callseq">
[]=( index, value )
</span>
</div>
<div class="method-description">
<p>Looks up the field by the semantics described in <a href="Row.html#method-i-field"><code>CSV::Row.field()</code></a> and assigns the <code>value</code>.</p>
<p>Assigning past the end of the row with an index will set all pairs between to <code>[nil, nil]</code>. Assigning to an unused header appends the new pair.</p>
<div class="method-source-code" id="5B-5D-3D-source">
<pre><span class="ruby-comment"># File lib/csv/row.rb, line 148</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">[]=</span>(<span class="ruby-operator">*</span><span class="ruby-identifier">args</span>)
<span class="ruby-identifier">value</span> = <span class="ruby-identifier">args</span>.<span class="ruby-identifier">pop</span>
<span class="ruby-keyword">if</span> <span class="ruby-identifier">args</span>.<span class="ruby-identifier">first</span>.<span class="ruby-identifier">is_a?</span> <span class="ruby-constant">Integer</span>
<span class="ruby-keyword">if</span> <span class="ruby-ivar">@row</span>[<span class="ruby-identifier">args</span>.<span class="ruby-identifier">first</span>].<span class="ruby-identifier">nil?</span> <span class="ruby-comment"># extending past the end with index</span>
<span class="ruby-ivar">@row</span>[<span class="ruby-identifier">args</span>.<span class="ruby-identifier">first</span>] = [<span class="ruby-keyword">nil</span>, <span class="ruby-identifier">value</span>]
<span class="ruby-ivar">@row</span>.<span class="ruby-identifier">map!</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">pair</span><span class="ruby-operator">|</span> <span class="ruby-identifier">pair</span>.<span class="ruby-identifier">nil?</span> <span class="ruby-operator">?</span> [<span class="ruby-keyword">nil</span>, <span class="ruby-keyword">nil</span>] <span class="ruby-operator">:</span> <span class="ruby-identifier">pair</span> }
<span class="ruby-keyword">else</span> <span class="ruby-comment"># normal index assignment</span>
<span class="ruby-ivar">@row</span>[<span class="ruby-identifier">args</span>.<span class="ruby-identifier">first</span>][<span class="ruby-value">1</span>] = <span class="ruby-identifier">value</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">else</span>
<span class="ruby-identifier">index</span> = <span class="ruby-identifier">index</span>(<span class="ruby-operator">*</span><span class="ruby-identifier">args</span>)
<span class="ruby-keyword">if</span> <span class="ruby-identifier">index</span>.<span class="ruby-identifier">nil?</span> <span class="ruby-comment"># appending a field</span>
<span class="ruby-keyword">self</span> <span class="ruby-operator"><<</span> [<span class="ruby-identifier">args</span>.<span class="ruby-identifier">first</span>, <span class="ruby-identifier">value</span>]
<span class="ruby-keyword">else</span> <span class="ruby-comment"># normal header assignment</span>
<span class="ruby-ivar">@row</span>[<span class="ruby-identifier">index</span>][<span class="ruby-value">1</span>] = <span class="ruby-identifier">value</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-i-delete" class="method-detail ">
<div class="method-heading">
<span class="method-callseq">
delete( header )
</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-heading">
<span class="method-callseq">
delete( header, offset )
</span>
</div>
<div class="method-heading">
<span class="method-callseq">
delete( index )
</span>
</div>
<div class="method-description">
<p>Removes a pair from the row by <code>header</code> or <code>index</code>. The pair is located as described in <a href="Row.html#method-i-field"><code>CSV::Row.field()</code></a>. The deleted pair is returned, or <code>nil</code> if a pair could not be found.</p>
<div class="method-source-code" id="delete-source">
<pre><span class="ruby-comment"># File lib/csv/row.rb, line 216</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">delete</span>(<span class="ruby-identifier">header_or_index</span>, <span class="ruby-identifier">minimum_index</span> = <span class="ruby-value">0</span>)
<span class="ruby-keyword">if</span> <span class="ruby-identifier">header_or_index</span>.<span class="ruby-identifier">is_a?</span> <span class="ruby-constant">Integer</span> <span class="ruby-comment"># by index</span>
<span class="ruby-ivar">@row</span>.<span class="ruby-identifier">delete_at</span>(<span class="ruby-identifier">header_or_index</span>)
<span class="ruby-keyword">elsif</span> <span class="ruby-identifier">i</span> = <span class="ruby-identifier">index</span>(<span class="ruby-identifier">header_or_index</span>, <span class="ruby-identifier">minimum_index</span>) <span class="ruby-comment"># by header</span>
<span class="ruby-ivar">@row</span>.<span class="ruby-identifier">delete_at</span>(<span class="ruby-identifier">i</span>)
<span class="ruby-keyword">else</span>
[ ]
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-i-delete_if" class="method-detail ">
<div class="method-heading">
<span class="method-name">delete_if</span><span
class="method-args">(&block)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>The provided <code>block</code> is passed a header and field for each pair in the row and expected to return <code>true</code> or <code>false</code>, depending on whether the pair should be deleted.</p>
<p>This method returns the row for chaining.</p>
<p>If no block is given, an <a href="../Enumerator.html"><code>Enumerator</code></a> is returned.</p>
<div class="method-source-code" id="delete_if-source">
<pre><span class="ruby-comment"># File lib/csv/row.rb, line 235</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">delete_if</span>(<span class="ruby-operator">&</span><span class="ruby-identifier">block</span>)
<span class="ruby-keyword">return</span> <span class="ruby-identifier">enum_for</span>(<span class="ruby-identifier">__method__</span>) { <span class="ruby-identifier">size</span> } <span class="ruby-keyword">unless</span> <span class="ruby-identifier">block_given?</span>
<span class="ruby-ivar">@row</span>.<span class="ruby-identifier">delete_if</span>(<span class="ruby-operator">&</span><span class="ruby-identifier">block</span>)
<span class="ruby-keyword">self</span> <span class="ruby-comment"># for chaining</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-i-dig" class="method-detail ">
<div class="method-heading">
<span class="method-name">dig</span><span
class="method-args">(index_or_header, *indexes)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>Extracts the nested value specified by the sequence of <code>index</code> or <code>header</code> objects by calling dig at each step, returning nil if any intermediate step is nil.</p>
<div class="method-source-code" id="dig-source">
<pre><span class="ruby-comment"># File lib/csv/row.rb, line 356</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">dig</span>(<span class="ruby-identifier">index_or_header</span>, <span class="ruby-operator">*</span><span class="ruby-identifier">indexes</span>)
<span class="ruby-identifier">value</span> = <span class="ruby-identifier">field</span>(<span class="ruby-identifier">index_or_header</span>)
<span class="ruby-keyword">if</span> <span class="ruby-identifier">value</span>.<span class="ruby-identifier">nil?</span>
<span class="ruby-keyword">nil</span>
<span class="ruby-keyword">elsif</span> <span class="ruby-identifier">indexes</span>.<span class="ruby-identifier">empty?</span>
<span class="ruby-identifier">value</span>
<span class="ruby-keyword">else</span>
<span class="ruby-keyword">unless</span> <span class="ruby-identifier">value</span>.<span class="ruby-identifier">respond_to?</span>(<span class="ruby-value">:dig</span>)
<span class="ruby-identifier">raise</span> <span class="ruby-constant">TypeError</span>, <span class="ruby-node">"#{value.class} does not have \#dig method"</span>
<span class="ruby-keyword">end</span>
<span class="ruby-identifier">value</span>.<span class="ruby-identifier">dig</span>(<span class="ruby-operator">*</span><span class="ruby-identifier">indexes</span>)
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-i-each" class="method-detail ">
<div class="method-heading">
<span class="method-name">each</span><span
class="method-args">(&block)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>Yields each pair of the row as header and field tuples (much like iterating over a <a href="../Hash.html"><code>Hash</code></a>). This method returns the row for chaining.</p>
<p>If no block is given, an <a href="../Enumerator.html"><code>Enumerator</code></a> is returned.</p>
<p>Support for <a href="../Enumerable.html"><code>Enumerable</code></a>.</p>
<div class="method-source-code" id="each-source">
<pre><span class="ruby-comment"># File lib/csv/row.rb, line 308</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">each</span>(<span class="ruby-operator">&</span><span class="ruby-identifier">block</span>)
<span class="ruby-keyword">return</span> <span class="ruby-identifier">enum_for</span>(<span class="ruby-identifier">__method__</span>) { <span class="ruby-identifier">size</span> } <span class="ruby-keyword">unless</span> <span class="ruby-identifier">block_given?</span>
<span class="ruby-ivar">@row</span>.<span class="ruby-identifier">each</span>(<span class="ruby-operator">&</span><span class="ruby-identifier">block</span>)
<span class="ruby-keyword">self</span> <span class="ruby-comment"># for chaining</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
<div class="aliases">
Also aliased as: <a href="Row.html#method-i-each_pair">each_pair</a>
</div>
</div>
<div id="method-i-each_pair" class="method-detail method-alias">
<div class="method-heading">
<span class="method-name">each_pair</span><span
class="method-args">(&block)</span>
</div>
<div class="method-description">
</div>
<div class="aliases">
Alias for: <a href="Row.html#method-i-each">each</a>
</div>
</div>
<div id="method-i-fetch" class="method-detail ">
<div class="method-heading">
<span class="method-callseq">
fetch( header )
</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-heading">
<span class="method-callseq">
fetch( header ) { |row| ... }
</span>
</div>
<div class="method-heading">
<span class="method-callseq">
fetch( header, default )
</span>
</div>
<div class="method-description">
<p>This method will fetch the field value by <code>header</code>. It has the same behavior as <a href="../Hash.html#method-i-fetch"><code>Hash#fetch</code></a>: if there is a field with the given <code>header</code>, its value is returned. Otherwise, if a block is given, it is yielded the <code>header</code> and its result is returned; if a <code>default</code> is given as the second argument, it is returned; otherwise a <a href="../KeyError.html"><code>KeyError</code></a> is raised.</p>
<div class="method-source-code" id="fetch-source">
<pre><span class="ruby-comment"># File lib/csv/row.rb, line 110</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">fetch</span>(<span class="ruby-identifier">header</span>, <span class="ruby-operator">*</span><span class="ruby-identifier">varargs</span>)
<span class="ruby-identifier">raise</span> <span class="ruby-constant">ArgumentError</span>, <span class="ruby-string">"Too many arguments"</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">varargs</span>.<span class="ruby-identifier">length</span> <span class="ruby-operator">></span> <span class="ruby-value">1</span>
<span class="ruby-identifier">pair</span> = <span class="ruby-ivar">@row</span>.<span class="ruby-identifier">assoc</span>(<span class="ruby-identifier">header</span>)
<span class="ruby-keyword">if</span> <span class="ruby-identifier">pair</span>
<span class="ruby-identifier">pair</span>.<span class="ruby-identifier">last</span>
<span class="ruby-keyword">else</span>
<span class="ruby-keyword">if</span> <span class="ruby-identifier">block_given?</span>
<span class="ruby-keyword">yield</span> <span class="ruby-identifier">header</span>
<span class="ruby-keyword">elsif</span> <span class="ruby-identifier">varargs</span>.<span class="ruby-identifier">empty?</span>
<span class="ruby-identifier">raise</span> <span class="ruby-constant">KeyError</span>, <span class="ruby-node">"key not found: #{header}"</span>
<span class="ruby-keyword">else</span>
<span class="ruby-identifier">varargs</span>.<span class="ruby-identifier">first</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-i-field" class="method-detail ">
<div class="method-heading">
<span class="method-callseq">
field( header )
</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-heading">
<span class="method-callseq">
field( header, offset )
</span>
</div>
<div class="method-heading">
<span class="method-callseq">
field( index )
</span>
</div>
<div class="method-description">
<p>This method will return the field value by <code>header</code> or <code>index</code>. If a field is not found, <code>nil</code> is returned.</p>
<p>When provided, <code>offset</code> ensures that a header match occurs on or later than the <code>offset</code> index. You can use this to find duplicate headers, without resorting to hard-coding exact indices.</p>
<div class="method-source-code" id="field-source">
<pre><span class="ruby-comment"># File lib/csv/row.rb, line 84</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">field</span>(<span class="ruby-identifier">header_or_index</span>, <span class="ruby-identifier">minimum_index</span> = <span class="ruby-value">0</span>)
<span class="ruby-comment"># locate the pair</span>
<span class="ruby-identifier">finder</span> = (<span class="ruby-identifier">header_or_index</span>.<span class="ruby-identifier">is_a?</span>(<span class="ruby-constant">Integer</span>) <span class="ruby-operator">||</span> <span class="ruby-identifier">header_or_index</span>.<span class="ruby-identifier">is_a?</span>(<span class="ruby-constant">Range</span>)) <span class="ruby-operator">?</span> <span class="ruby-value">:[]</span> <span class="ruby-operator">:</span> <span class="ruby-value">:assoc</span>
<span class="ruby-identifier">pair</span> = <span class="ruby-ivar">@row</span>[<span class="ruby-identifier">minimum_index</span><span class="ruby-operator">..</span><span class="ruby-value">-1</span>].<span class="ruby-identifier">send</span>(<span class="ruby-identifier">finder</span>, <span class="ruby-identifier">header_or_index</span>)
<span class="ruby-comment"># return the field if we have a pair</span>
<span class="ruby-keyword">if</span> <span class="ruby-identifier">pair</span>.<span class="ruby-identifier">nil?</span>
<span class="ruby-keyword">nil</span>
<span class="ruby-keyword">else</span>
<span class="ruby-identifier">header_or_index</span>.<span class="ruby-identifier">is_a?</span>(<span class="ruby-constant">Range</span>) <span class="ruby-operator">?</span> <span class="ruby-identifier">pair</span>.<span class="ruby-identifier">map</span>(<span class="ruby-operator">&</span><span class="ruby-value">:last</span>) <span class="ruby-operator">:</span> <span class="ruby-identifier">pair</span>.<span class="ruby-identifier">last</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
<div class="aliases">
Also aliased as: <a href="Row.html#method-i-5B-5D">[]</a>
</div>
</div>
<div id="method-i-field-3F" class="method-detail ">
<div class="method-heading">
<span class="method-name">field?</span><span
class="method-args">(data)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>Returns <code>true</code> if <code>data</code> matches a field in this row, and <code>false</code> otherwise.</p>
<div class="method-source-code" id="field-3F-source">
<pre><span class="ruby-comment"># File lib/csv/row.rb, line 294</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">field?</span>(<span class="ruby-identifier">data</span>)
<span class="ruby-identifier">fields</span>.<span class="ruby-identifier">include?</span> <span class="ruby-identifier">data</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-i-field_row-3F" class="method-detail ">
<div class="method-heading">
<span class="method-name">field_row?</span><span
class="method-args">()</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>Returns <code>true</code> if this is a field row.</p>
<div class="method-source-code" id="field_row-3F-source">
<pre><span class="ruby-comment"># File lib/csv/row.rb, line 62</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">field_row?</span>
<span class="ruby-keyword">not</span> <span class="ruby-identifier">header_row?</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-i-fields" class="method-detail ">
<div class="method-heading">
<span class="method-name">fields</span><span
class="method-args">(*headers_and_or_indices)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>This method accepts any number of arguments which can be headers, indices, Ranges of either, or two-element Arrays containing a header and offset. Each argument will be replaced with a field lookup as described in <a href="Row.html#method-i-field"><code>CSV::Row.field()</code></a>.</p>
<p>If called with no arguments, all fields are returned.</p>
<div class="method-source-code" id="fields-source">
<pre><span class="ruby-comment"># File lib/csv/row.rb, line 251</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">fields</span>(<span class="ruby-operator">*</span><span class="ruby-identifier">headers_and_or_indices</span>)
<span class="ruby-keyword">if</span> <span class="ruby-identifier">headers_and_or_indices</span>.<span class="ruby-identifier">empty?</span> <span class="ruby-comment"># return all fields--no arguments</span>
<span class="ruby-ivar">@row</span>.<span class="ruby-identifier">map</span>(<span class="ruby-operator">&</span><span class="ruby-value">:last</span>)
<span class="ruby-keyword">else</span> <span class="ruby-comment"># or work like values_at()</span>
<span class="ruby-identifier">all</span> = []
<span class="ruby-identifier">headers_and_or_indices</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">h_or_i</span><span class="ruby-operator">|</span>
<span class="ruby-keyword">if</span> <span class="ruby-identifier">h_or_i</span>.<span class="ruby-identifier">is_a?</span> <span class="ruby-constant">Range</span>
<span class="ruby-identifier">index_begin</span> = <span class="ruby-identifier">h_or_i</span>.<span class="ruby-identifier">begin</span>.<span class="ruby-identifier">is_a?</span>(<span class="ruby-constant">Integer</span>) <span class="ruby-operator">?</span> <span class="ruby-identifier">h_or_i</span>.<span class="ruby-identifier">begin</span> <span class="ruby-operator">:</span>
<span class="ruby-identifier">index</span>(<span class="ruby-identifier">h_or_i</span>.<span class="ruby-identifier">begin</span>)
<span class="ruby-identifier">index_end</span> = <span class="ruby-identifier">h_or_i</span>.<span class="ruby-identifier">end</span>.<span class="ruby-identifier">is_a?</span>(<span class="ruby-constant">Integer</span>) <span class="ruby-operator">?</span> <span class="ruby-identifier">h_or_i</span>.<span class="ruby-identifier">end</span> <span class="ruby-operator">:</span>
<span class="ruby-identifier">index</span>(<span class="ruby-identifier">h_or_i</span>.<span class="ruby-identifier">end</span>)
<span class="ruby-identifier">new_range</span> = <span class="ruby-identifier">h_or_i</span>.<span class="ruby-identifier">exclude_end?</span> <span class="ruby-operator">?</span> (<span class="ruby-identifier">index_begin</span><span class="ruby-operator">...</span><span class="ruby-identifier">index_end</span>) <span class="ruby-operator">:</span>
(<span class="ruby-identifier">index_begin</span><span class="ruby-operator">..</span><span class="ruby-identifier">index_end</span>)
<span class="ruby-identifier">all</span>.<span class="ruby-identifier">concat</span>(<span class="ruby-identifier">fields</span>.<span class="ruby-identifier">values_at</span>(<span class="ruby-identifier">new_range</span>))
<span class="ruby-keyword">else</span>
<span class="ruby-identifier">all</span> <span class="ruby-operator"><<</span> <span class="ruby-identifier">field</span>(<span class="ruby-operator">*</span><span class="ruby-constant">Array</span>(<span class="ruby-identifier">h_or_i</span>))
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">return</span> <span class="ruby-identifier">all</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
<div class="aliases">
Also aliased as: <a href="Row.html#method-i-values_at">values_at</a>
</div>
</div>
<div id="method-i-has_key-3F" class="method-detail ">
<div class="method-heading">
<span class="method-name">has_key?</span><span
class="method-args">(header)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>Returns <code>true</code> if there is a field with the given <code>header</code>.</p>
<div class="method-source-code" id="has_key-3F-source">
<pre><span class="ruby-comment"># File lib/csv/row.rb, line 127</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">has_key?</span>(<span class="ruby-identifier">header</span>)
<span class="ruby-operator">!</span><span class="ruby-operator">!</span><span class="ruby-ivar">@row</span>.<span class="ruby-identifier">assoc</span>(<span class="ruby-identifier">header</span>)
<span class="ruby-keyword">end</span></pre>
</div>
</div>
<div class="aliases">
Also aliased as: <a href="Row.html#method-i-include-3F">include?</a>, <a href="Row.html#method-i-key-3F">key?</a>, <a href="Row.html#method-i-member-3F">member?</a>, <a href="Row.html#method-i-header-3F">header?</a>
</div>
</div>
<div id="method-i-header-3F" class="method-detail method-alias">
<div class="method-heading">
<span class="method-name">header?</span><span
class="method-args">(header)</span>
</div>
<div class="method-description">
</div>
<div class="aliases">
Alias for: <a href="Row.html#method-i-has_key-3F">has_key?</a>
</div>
</div>
<div id="method-i-header_row-3F" class="method-detail ">
<div class="method-heading">
<span class="method-name">header_row?</span><span
class="method-args">()</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>Returns <code>true</code> if this is a header row.</p>
<div class="method-source-code" id="header_row-3F-source">
<pre><span class="ruby-comment"># File lib/csv/row.rb, line 57</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">header_row?</span>
<span class="ruby-ivar">@header_row</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-i-headers" class="method-detail ">
<div class="method-heading">
<span class="method-name">headers</span><span
class="method-args">()</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>Returns the headers of this row.</p>
<div class="method-source-code" id="headers-source">
<pre><span class="ruby-comment"># File lib/csv/row.rb, line 67</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">headers</span>
<span class="ruby-ivar">@row</span>.<span class="ruby-identifier">map</span>(<span class="ruby-operator">&</span><span class="ruby-value">:first</span>)
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-i-include-3F" class="method-detail method-alias">
<div class="method-heading">
<span class="method-name">include?</span><span
class="method-args">(header)</span>
</div>
<div class="method-description">
</div>
<div class="aliases">
Alias for: <a href="Row.html#method-i-has_key-3F">has_key?</a>
</div>
</div>
<div id="method-i-index" class="method-detail ">
<div class="method-heading">
<span class="method-callseq">
index( header )
</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-heading">
<span class="method-callseq">
index( header, offset )
</span>
</div>
<div class="method-description">
<p>This method will return the index of a field with the provided <code>header</code>. The <code>offset</code> can be used to locate duplicate header names, as described in <a href="Row.html#method-i-field"><code>CSV::Row.field()</code></a>.</p>
<div class="method-source-code" id="index-source">
<pre><span class="ruby-comment"># File lib/csv/row.rb, line 283</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">index</span>(<span class="ruby-identifier">header</span>, <span class="ruby-identifier">minimum_index</span> = <span class="ruby-value">0</span>)
<span class="ruby-comment"># find the pair</span>
<span class="ruby-identifier">index</span> = <span class="ruby-identifier">headers</span>[<span class="ruby-identifier">minimum_index</span><span class="ruby-operator">..</span><span class="ruby-value">-1</span>].<span class="ruby-identifier">index</span>(<span class="ruby-identifier">header</span>)
<span class="ruby-comment"># return the index at the right offset, if we found one</span>
<span class="ruby-identifier">index</span>.<span class="ruby-identifier">nil?</span> <span class="ruby-operator">?</span> <span class="ruby-keyword">nil</span> <span class="ruby-operator">:</span> <span class="ruby-identifier">index</span> <span class="ruby-operator">+</span> <span class="ruby-identifier">minimum_index</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-i-initialize_copy" class="method-detail ">
<div class="method-heading">
<span class="method-name">initialize_copy</span><span
class="method-args">(other)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<div class="method-calls-super">
Calls superclass method
</div>
<div class="method-source-code" id="initialize_copy-source">
<pre><span class="ruby-comment"># File lib/csv/row.rb, line 51</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">initialize_copy</span>(<span class="ruby-identifier">other</span>)
<span class="ruby-keyword">super</span>
<span class="ruby-ivar">@row</span> = <span class="ruby-ivar">@row</span>.<span class="ruby-identifier">dup</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-i-inspect" class="method-detail ">
<div class="method-heading">
<span class="method-name">inspect</span><span
class="method-args">()</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>A summary of fields, by header, in an ASCII compatible <a href="../String.html"><code>String</code></a>.</p>
<div class="method-source-code" id="inspect-source">
<pre><span class="ruby-comment"># File lib/csv/row.rb, line 373</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">inspect</span>
<span class="ruby-identifier">str</span> = [<span class="ruby-string">"#<"</span>, <span class="ruby-keyword">self</span>.<span class="ruby-identifier">class</span>.<span class="ruby-identifier">to_s</span>]
<span class="ruby-identifier">each</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">header</span>, <span class="ruby-identifier">field</span><span class="ruby-operator">|</span>
<span class="ruby-identifier">str</span> <span class="ruby-operator"><<</span> <span class="ruby-string">" "</span> <span class="ruby-operator"><<</span> (<span class="ruby-identifier">header</span>.<span class="ruby-identifier">is_a?</span>(<span class="ruby-constant">Symbol</span>) <span class="ruby-operator">?</span> <span class="ruby-identifier">header</span>.<span class="ruby-identifier">to_s</span> <span class="ruby-operator">:</span> <span class="ruby-identifier">header</span>.<span class="ruby-identifier">inspect</span>) <span class="ruby-operator"><<</span>
<span class="ruby-string">":"</span> <span class="ruby-operator"><<</span> <span class="ruby-identifier">field</span>.<span class="ruby-identifier">inspect</span>
<span class="ruby-keyword">end</span>
<span class="ruby-identifier">str</span> <span class="ruby-operator"><<</span> <span class="ruby-string">">"</span>
<span class="ruby-keyword">begin</span>
<span class="ruby-identifier">str</span>.<span class="ruby-identifier">join</span>(<span class="ruby-string">''</span>)
<span class="ruby-keyword">rescue</span> <span class="ruby-comment"># any encoding error</span>
<span class="ruby-identifier">str</span>.<span class="ruby-identifier">map</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">s</span><span class="ruby-operator">|</span>
<span class="ruby-identifier">e</span> = <span class="ruby-constant">Encoding</span><span class="ruby-operator">::</span><span class="ruby-constant">Converter</span>.<span class="ruby-identifier">asciicompat_encoding</span>(<span class="ruby-identifier">s</span>.<span class="ruby-identifier">encoding</span>)
<span class="ruby-identifier">e</span> <span class="ruby-operator">?</span> <span class="ruby-identifier">s</span>.<span class="ruby-identifier">encode</span>(<span class="ruby-identifier">e</span>) <span class="ruby-operator">:</span> <span class="ruby-identifier">s</span>.<span class="ruby-identifier">force_encoding</span>(<span class="ruby-string">"ASCII-8BIT"</span>)
<span class="ruby-keyword">end</span>.<span class="ruby-identifier">join</span>(<span class="ruby-string">''</span>)
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-i-key-3F" class="method-detail method-alias">
<div class="method-heading">
<span class="method-name">key?</span><span
class="method-args">(header)</span>
</div>
<div class="method-description">
</div>
<div class="aliases">
Alias for: <a href="Row.html#method-i-has_key-3F">has_key?</a>
</div>
</div>
<div id="method-i-member-3F" class="method-detail method-alias">
<div class="method-heading">
<span class="method-name">member?</span><span
class="method-args">(header)</span>
</div>
<div class="method-description">
</div>
<div class="aliases">
Alias for: <a href="Row.html#method-i-has_key-3F">has_key?</a>
</div>
</div>
<div id="method-i-push" class="method-detail ">
<div class="method-heading">
<span class="method-name">push</span><span
class="method-args">(*args)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>A shortcut for appending multiple fields. Equivalent to:</p>
<pre class="ruby"><span class="ruby-identifier">args</span>.<span class="ruby-identifier">each</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">arg</span><span class="ruby-operator">|</span> <span class="ruby-identifier">csv_row</span> <span class="ruby-operator"><<</span> <span class="ruby-identifier">arg</span> }
</pre>
<p>This method returns the row for chaining.</p>
<div class="method-source-code" id="push-source">
<pre><span class="ruby-comment"># File lib/csv/row.rb, line 200</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">push</span>(<span class="ruby-operator">*</span><span class="ruby-identifier">args</span>)
<span class="ruby-identifier">args</span>.<span class="ruby-identifier">each</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">arg</span><span class="ruby-operator">|</span> <span class="ruby-keyword">self</span> <span class="ruby-operator"><<</span> <span class="ruby-identifier">arg</span> }
<span class="ruby-keyword">self</span> <span class="ruby-comment"># for chaining</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-i-to_csv" class="method-detail ">
<div class="method-heading">
<span class="method-name">to_csv</span><span
class="method-args">(**options)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>Returns the row as a <a href="../CSV.html"><code>CSV</code></a> <a href="../String.html"><code>String</code></a>. Headers are not used. Equivalent to:</p>
<pre class="ruby"><span class="ruby-identifier">csv_row</span>.<span class="ruby-identifier">fields</span>.<span class="ruby-identifier">to_csv</span>( <span class="ruby-identifier">options</span> )
</pre>
<div class="method-source-code" id="to_csv-source">
<pre><span class="ruby-comment"># File lib/csv/row.rb, line 347</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">to_csv</span>(<span class="ruby-operator">**</span><span class="ruby-identifier">options</span>)
<span class="ruby-identifier">fields</span>.<span class="ruby-identifier">to_csv</span>(<span class="ruby-operator">**</span><span class="ruby-identifier">options</span>)
<span class="ruby-keyword">end</span></pre>
</div>
</div>
<div class="aliases">
Also aliased as: <a href="Row.html#method-i-to_s">to_s</a>
</div>
</div>
<div id="method-i-to_h" class="method-detail ">
<div class="method-heading">
<span class="method-name">to_h</span><span
class="method-args">()</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>Collapses the row into a simple <a href="../Hash.html"><code>Hash</code></a>. Be warned that this discards field order and clobbers duplicate fields.</p>
<div class="method-source-code" id="to_h-source">
<pre><span class="ruby-comment"># File lib/csv/row.rb, line 331</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">to_h</span>
<span class="ruby-identifier">hash</span> = {}
<span class="ruby-identifier">each</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">key</span>, <span class="ruby-identifier">_value</span><span class="ruby-operator">|</span>
<span class="ruby-identifier">hash</span>[<span class="ruby-identifier">key</span>] = <span class="ruby-keyword">self</span>[<span class="ruby-identifier">key</span>] <span class="ruby-keyword">unless</span> <span class="ruby-identifier">hash</span>.<span class="ruby-identifier">key?</span>(<span class="ruby-identifier">key</span>)
<span class="ruby-keyword">end</span>
<span class="ruby-identifier">hash</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
<div class="aliases">
Also aliased as: <a href="Row.html#method-i-to_hash">to_hash</a>
</div>
</div>
<div id="method-i-to_hash" class="method-detail method-alias">
<div class="method-heading">
<span class="method-name">to_hash</span><span
class="method-args">()</span>
</div>
<div class="method-description">
</div>
<div class="aliases">
Alias for: <a href="Row.html#method-i-to_h">to_h</a>
</div>
</div>
<div id="method-i-to_s" class="method-detail method-alias">
<div class="method-heading">
<span class="method-name">to_s</span><span
class="method-args">(**options)</span>
</div>
<div class="method-description">
</div>
<div class="aliases">
Alias for: <a href="Row.html#method-i-to_csv">to_csv</a>
</div>
</div>
<div id="method-i-values_at" class="method-detail method-alias">
<div class="method-heading">
<span class="method-name">values_at</span><span
class="method-args">(*headers_and_or_indices)</span>
</div>
<div class="method-description">
</div>
<div class="aliases">
Alias for: <a href="Row.html#method-i-fields">fields</a>
</div>
</div>
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