删除数组中重复项（uniq）

来自于：http://www.planabc.net/2009/12/26/array_uniq/

TUI.unique = function( array ) {

var ret = [], record = {}, it, tmp;

var type = {

“number”: function(n){ return “_TUI_num” + n; },

“string”: function(n){ return n; },

“boolean”: function(n){ return “_TUI_boolean” + n; },

“object”: function(n){ return n === null ? “TUI_null” : $.data(n); },

“undefined”: function(n){ return “_TUI_undefined”; }

};

for ( var i = 0, length = array.length; i < length; i++ ) {

it = tmp = array[i];

tmp = type[typeof it](it);

if( !record[tmp] ) {

ret.push(it);

record[tmp] = true;

}

}

return ret;

};



测试：



var b=[1,3,5];

TUI.unique([1,3,4,5,null,false,$(".pack")[0],b,"ab","cc",[1,3],3,6,b,1,false,null,"null","","false","",$(".pack")[0],"cc"])

var uniq = function (arr) {

    var a = [],

        o = {},

        i,

        v,

        len = arr.length;



    if (len < 2) {

        return arr;

    }



    for (i = 0; i < len; i++) {

        v = arr[i];

        if (o[v] !== 1) {

            a.push(v);

            o[v] = 1;

        }

    }



    return a;

}