Underscore.JS keys方法

_.keys(object)

var _ = require('underscore');
// Example 1
var result = _.keys({one: 1, two : 2, three: 3});
console.log(result);

// Example 2
result = _.keys({ name: 'Sam', age: 30});
console.log(result);

>node tester.js

[ 'one', 'two', 'three' ]
[ 'name', 'age' ]