javascript - 在javascript中删除数组

Question

我们如何从中删除数组条目:

            var a = [],b = [],c = [],d = [];
            var multi = {
                a: a, b: b, c: c, d: d
            };

表示如果我想从 multi 中删除 a 数组。我该怎么办？

Answer 1

使用delete关键字:

delete multi.a

示例:

var a = [], b = [], c = [], d = [];
var multi = { a: a, b: b, c: c, d: d };

delete multi.a;
console.log(multi);

结果:

Object
  b: Array[0]
  c: Array[0]
  d: Array[0]

文档:

• https://developer.mozilla.org/en/JavaScript/Reference/Operators/delete

The delete operator removes a property from an object.