js数组中删除重复值的代码小结_javascript技巧

js数组中去除重复值

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方法二

//去重复数组
function unique(data){
data = data || [];
var a = {};
len = data.length;
for (var i=0; ivar v = data[i];
if (typeof(a[v]) == 'undefined'){
a[v] = 1;
}
};
data.length=0;
for (var i in a){
data[data.length] = i;
}
return data;
}

方法三

var arr = ["123","123","123","123","sfsdf","123","345","123","123","345","456","567","sdc"];
var str = [];
for(var i = 0,len = arr.length;i ! RegExp(arr[i],"g").test(str.join(",")) && (str.push(arr[i]));
}
alert(str);

方法四

var pureMulti1=function(arr){
var obj={};
var a = [];
for(var i=0,l=arr.length;iif(!((arr[i]+"") in obj)){
a.push(arr[i]);
}
obj[arr[i]]="";
}
return a;
}