Underscore.JS size方法

_.size(list)

var _ = require('underscore');

//Example 1: get a size of a list of numbers
result = _.size([1, 2, 3, 4])
console.log(result)

//Example 2: get a size of a object
result = _.size({"one": 1, "two": 2, "three": 3})
console.log(result)

>node tester.js

4
3