javascript - 如何从javascript中的对象数组中删除对象

Question

这个问题已经有答案了:

How can you find and delete a section of an array with a parameter of a string? (5 个回答)

已关闭 7 年前。

任何人都可以指导我从 JavaScript 中的对象数组中删除对象

这是我的 JavaScript 代码

<script>
  var line  = {lines:[]};

  function change(num){
    line.lines.push({"linechange":num});
  }
</script>

这里num是某个整数值，有没有办法根据 num 的值删除推送的对象？

Answer 1

点击这里:https://stackoverflow.com/search?q=javascript+delete+from+array

在这种情况下删除只会将元素设置为未定义:

> myArray = ['a', 'b', 'c', 'd']
  ["a", "b", "c", "d"]
> delete myArray[0]
  true
> myArray
  [undefined, "b", "c", "d"]

拼接实际上是从数组中删除元素:

> myArray = ['a', 'b', 'c', 'd']
  ["a", "b", "c", "d"]
> myArray.splice(0, 2)
  ["a", "b"]
> myArray
  ["c", "d"]

简单的搜索，你就得到了这个。引用:Deleting array elements in JavaScript - delete vs splice