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Dammmien/count.js

Last active September 30, 2016 09:09
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Counting the occurrences of elements in an array.
Raw
count.js
var arr = "The quick brown fox jumps over the lazy dog".split( '' );
arr.reduce( ( countMap, item ) => {
countMap[ item ] = ( countMap[ item ] || 0 ) + 1;
return countMap;
}, {} );
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