Underscore.JS map方法

_.map(list, iteratee, [context])

var _ = require('underscore');

//Example 1. get Square of each number of array
var list = _.map([1, 2, 3], function(x) { return x*x });
console.log(list);

//Example 2. get squre of each number of object
list = _.map({one: 1, two: 2, three: 3}, function(value, key) { return value*value });
console.log(list);

>node tester.js

[ 1, 4, 9 ]
[ 1, 4, 9 ]