1--- 2title: foo - test 3layout: api 4--- 5 6<div class='api-docs-breadcrumbs'><a href="test/index">test</a> / <a href="test/foo">foo</a></div> 7 8# foo 9 10<div class="overload-group" markdown="1"> 11 12<div class="signature"><code><span class="keyword">fun </span><span class="identifier">foo</span><span class="symbol">(</span><span class="symbol">)</span><span class="symbol">: </span><span class="identifier">Int</span></code></div> 13 14Groups elements of the original sequence by the key returned by the given <a href="#">keySelector</a> function 15applied to each element and returns a map where each group key is associated with a list of corresponding elements. 16 17<div class="sample" markdown="1"> 18 19``` kotlin 20 21 22fun main(args: Array<String>) { 23//sampleStart 24if (true) { 25 println(property) 26} 27//sampleEnd 28} 29``` 30 31</div> 32 33</div> 34 35<div class="overload-group" markdown="1"> 36 37<div class="signature"><code><span class="keyword">fun </span><span class="identifier">foo</span><span class="symbol">(</span><span class="parameterName" id="$foo(kotlin.Int)/i">i</span><span class="symbol">:</span> <span class="identifier">Int</span><span class="symbol">)</span><span class="symbol">: </span><span class="identifier">Int</span></code></div> 38 39</div> 40