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<title>combinations (Array)</title>
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<pre><span class="ruby-comment cmt"># File lib/facet/array/combinations.rb, line 25</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-keyword kw">self</span>.<span class="ruby-identifier">combinations</span>(<span class="ruby-identifier">head</span>, <span class="ruby-operator">*</span><span class="ruby-identifier">rest</span>)
<span class="ruby-identifier">crest</span> = <span class="ruby-identifier">rest</span>.<span class="ruby-identifier">empty?</span> <span class="ruby-value">? </span>[[]] <span class="ruby-operator">:</span> <span class="ruby-identifier">combinations</span>(<span class="ruby-operator">*</span><span class="ruby-identifier">rest</span>)
<span class="ruby-identifier">head</span>.<span class="ruby-identifier">inject</span>([]) { <span class="ruby-operator">|</span><span class="ruby-identifier">combs</span>, <span class="ruby-identifier">item</span><span class="ruby-operator">|</span> <span class="ruby-identifier">combs</span> <span class="ruby-operator">+</span> <span class="ruby-identifier">crest</span>.<span class="ruby-identifier">map</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">comb</span><span class="ruby-operator">|</span> [<span class="ruby-identifier">item</span>] <span class="ruby-operator">+</span> <span class="ruby-identifier">comb</span> } }
<span class="ruby-keyword kw">end</span></pre>
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Version data entries
3 entries across 3 versions & 1 rubygems
| Version | Path |
|---|---|
| facets-0.7.0 | doc/atomic-rdoc/classes/Array.src/M000074.html |
| facets-0.7.1 | doc/atomic-rdoc/classes/Array.src/M000074.html |
| facets-0.7.2 | doc/atomic-rdoc/classes/Array.src/M000075.html |