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Last active December 19, 2015 02:19
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Javascript build trie from array-like
var reduce =;
var trie = (function(){
var wordReduce = function(parent, l) {
return (parent[l] = (parent[l] || {}));
var wordsReduce = function(trie, word) {
var node = reduce(word, wordReduce, trie);
node[''] = null;
return trie;
return function(words) {
return reduce(words, wordsReduce, {});
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Converting word to a string on line 8 will alternatively allow words to be an array-like of objects with toString implementations instead of an array-like of array-likes.

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