underscore.js

_.indexOf([1,2,3],2);
搜索元素所在位置，返回值为1

_.keys({one:1,two:2,three:3});

返回值为

["one","two","three"]

_.values({one:1,two:2,three:3});

返回值为

[1,2,3]

_.pairs({one:1,two:2,three:3});

返回值为

[["one",1],["two",2],["three",3]]

_.pick({name:'moe',age:'50',userid:'moe1'},'name','age');

返回值为

{name:'moe',age:50}

_.pick({name:'moe',age:'50',userid:'moe1'},function(value,key,oject){return _>isNumber(value);
});

返回值为

{age:50}

_.omit({name:'moe',age:50,userid:'moe1'},'userid');

返回值为

{name:'moe',age:50}