比较两个Javascript数组并删除重复项 [英] Compare two Javascript Arrays and remove Duplicates

问题描述

如果它有另一个数组的元素，有没有其他更好的方法可以从一个数组中删除重复项？？

It is working well is there any other better way to remove duplicates from one array if it has elements of another array ?.

<script>
var array1 = new Array("a","b","c","d","e","f");
var array2 = new Array("c","e");

for (var i = 0; i<array2.length; i++) {
    var arrlen = array1.length;
    for (var j = 0; j<arrlen; j++) {
        if (array2[i] == array1[j]) {
            array1 = array1.slice(0, j).concat(array1.slice(j+1, arrlen));
        }
    }
}
alert(array1);

</script>

推荐答案

array1 = array1.filter(function(val) {
  return array2.indexOf(val) == -1;
});

或者，ES6的可用性：

Or, with the availability of ES6:

array1 = array1.filter(val => !array2.includes(val));

filter（）引用

indexOf（）这里引用

include（）this here

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