JavaScript移除数组内重复元素的方法

这段JS代码用于从数组中移除重复的元素，比如： ['apple', 'orange', 'peach', 'apple', 'strawberry', 'orange'] 去重后返回：s ['apple', 'orange', 'peach', 'strawberry']

复制代码 代码如下:

function removeDuplicates(arr) {
    var temp = {};
    for (var i = 0; i < arr.length; i++)
        temp[arr[i]] = true;
    var r = [];
    for (var k in temp)
        r.push(k);
    return r;
}
//Usage
var fruits = ['apple', 'orange', 'peach', 'apple', 'strawberry', 'orange'];
var uniquefruits = removeDuplicates(fruits);
//print uniquefruits ['apple', 'orange', 'peach', 'strawberry'];

下面的代码可以在浏览器中验证

复制代码 代码如下:

Remove duplicate elements from an array.  <br>
<pre>     var fruits = ['apple', 'orange', 'peach', 'apple', 'strawberry', 'orange'];
</pre>
Note 'orange' is duplicate in fruits array. Click to remove duplicate elements from fruits array:<br>
<button>Remove Duplicate</button>
<script>
function removeDuplicates(arr) {
    var temp = {};
    for (var i = 0; i < arr.length; i++)
        temp[arr[i]] = true;
    var r = [];
    for (var k in temp)
        r.push(k);
    return r;
}
function check() {
    var fruits = ['apple', 'orange', 'peach', 'apple', 'strawberry', 'orange'];
    var uniquefruits = removeDuplicates(fruits);
    alert(uniquefruits);
}
</script>