从关联数组中删除一个键 [英] Delete a key from an associative array

问题描述

考虑var person=JSON.parse('{"name":"Alice","id",1234}').

如何从变量 person 中删除密钥?例如，如何彻底删除name"，使 person 变成 {"id":1234}?

How do I remove a key from the variable person? For example, how do I remove "name" completely, so that person becomes {"id":1234}?

推荐答案

尝试 delete person["name"].

请注意，delete 只会将其设置为未定义，这将不会正确反映在数组的长度中.

Notice that delete will only set it as undefined, which will then not be reflected correctly in the length of the array.

如果你知道密钥，你应该使用 splice，即

If you know the key you should use splice i.e.

myArray.splice(key, 1);

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