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<title>Returns a sub-sequence of a given range</title>
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<h1 class="refname">Ds\Sequence::slice</h1>
<p class="verinfo">(PECL ds >= 1.0.0)</p><p class="refpurpose"><span class="refname">Ds\Sequence::slice</span> — <span class="dc-title">
Returns a sub-sequence of a given range
</span></p>
</div>
<div class="refsect1 description" id="refsect1-ds-sequence.slice-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="modifier">abstract</span> <span class="modifier">public</span> <span class="type"><span class="type Ds\Sequence">Ds\Sequence</span></span> <span class="methodname"><strong>Ds\Sequence::slice</strong></span>
( <span class="methodparam"><span class="type">int</span> <code class="parameter">$index</code></span>
[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$length</code></span>
] )</div>
<p class="para rdfs-comment">
Creates a sub-sequence of a given range.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-ds-sequence.slice-parameters">
<h3 class="title">Parameters</h3>
<dl>
<dt>
<code class="parameter">index</code></dt>
<dd>
<p class="para">
The index at which the sub-sequence starts.
</p>
<p class="para">
If positive, the sequence will start at that index in the sequence.
If negative, the sequence will start that far from the end.
</p>
</dd>
<dt>
<code class="parameter">length</code></dt>
<dd>
<p class="para">
If a length is given and is positive, the resulting
sequence will have up to that many values in it.
If the length results in an overflow, only
values up to the end of the sequence will be included.
If a length is given and is negative, the sequence
will stop that many values from the end.
If a length is not provided, the resulting sequence
will contain all values between the index and the
end of the sequence.
</p>
</dd>
</dl>
</div>
<div class="refsect1 returnvalues" id="refsect1-ds-sequence.slice-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
A sub-sequence of the given range.
</p>
</div>
<div class="refsect1 examples" id="refsect1-ds-sequence.slice-examples">
<h3 class="title">Examples</h3>
<div class="example" id="example-5161">
<p><strong>Example #1 <span class="function"><strong>Ds\Sequence::slice()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$sequence </span><span style="color: #007700">= new \</span><span style="color: #0000BB">Ds</span><span style="color: #007700">\</span><span style="color: #0000BB">Vector</span><span style="color: #007700">([</span><span style="color: #DD0000">"a"</span><span style="color: #007700">, </span><span style="color: #DD0000">"b"</span><span style="color: #007700">, </span><span style="color: #DD0000">"c"</span><span style="color: #007700">, </span><span style="color: #DD0000">"d"</span><span style="color: #007700">, </span><span style="color: #DD0000">"e"</span><span style="color: #007700">]);<br /><br /></span><span style="color: #FF8000">// Slice from 2 onwards<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$sequence</span><span style="color: #007700">-></span><span style="color: #0000BB">slice</span><span style="color: #007700">(</span><span style="color: #0000BB">2</span><span style="color: #007700">));<br /><br /></span><span style="color: #FF8000">// Slice from 1, for a length of 3<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$sequence</span><span style="color: #007700">-></span><span style="color: #0000BB">slice</span><span style="color: #007700">(</span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">3</span><span style="color: #007700">));<br /><br /></span><span style="color: #FF8000">// Slice from 1 onwards<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$sequence</span><span style="color: #007700">-></span><span style="color: #0000BB">slice</span><span style="color: #007700">(</span><span style="color: #0000BB">1</span><span style="color: #007700">));<br /><br /></span><span style="color: #FF8000">// Slice from 2 from the end onwards<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$sequence</span><span style="color: #007700">-></span><span style="color: #0000BB">slice</span><span style="color: #007700">(-</span><span style="color: #0000BB">2</span><span style="color: #007700">));<br /><br /></span><span style="color: #FF8000">// Slice from 1 to 1 from the end<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$sequence</span><span style="color: #007700">-></span><span style="color: #0000BB">slice</span><span style="color: #007700">(</span><span style="color: #0000BB">1</span><span style="color: #007700">, -</span><span style="color: #0000BB">1</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
<div class="example-contents"><p>The above example will output
something similar to:</p></div>
<div class="example-contents screen">
<div class="cdata"><pre>
Ds\Vector Object
(
[0] => c
[1] => d
[2] => e
)
Ds\Vector Object
(
[0] => b
[1] => c
[2] => d
)
Ds\Vector Object
(
[0] => b
[1] => c
[2] => d
[3] => e
)
Ds\Vector Object
(
[0] => d
[1] => e
)
Ds\Vector Object
(
[0] => b
[1] => c
[2] => d
)
</pre></div>
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