Underscore.JS contains方法

_.contains(list, value, [fromIndex])

var _ = require('underscore');

var list = [1, 2, 3, 5]
//Example 1. check if any number is present
var result = _.contains(list, 2);
console.log(result);

//Example 2. check if any number is present from given index
var result = _.contains(list, 2, 2);
console.log(result);

>node tester.js

true
false