javascript - js 两个数组相减
本文介绍了javascript - js 两个数组相减的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
问 题
var arr1 = ["", "100", "120", "125", "125", "130", "130"];
var arr2 = ["", "120", "125", "125", "130"];
请问如何求得两个数组之差?使得新数组为 arr3 = ["100","130"]
或则转化为处理两个字符串的问题:
var p1 = 100, 120, 125, 125, 130, 130;
var p2 = 120, 125, 125, 130;
求得两个字符串之差?使得新字符串为 p3 = 100,130;
补充: 要求根据元素(字符)个数相减
解决方案
不说废话,直接上代码
var arr1 = ["", "120", "125", "125", "130", "130", "130", "130", "130"];
var arr2 = ["", "120", "125", "130"];
for (var i = arr1.length - 1; i >= 0; i--) {
a = arr1[i];
for (var j = arr2.length - 1; j >= 0; j--) {
b = arr2[j];
if (a == b) {
arr1.splice(i, 1);
arr2.splice(j, 1);
break;
}
}
}
console.log(arr1); // ["125","130","130","130","130"]
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