推对面（）; [英] Opposite of push();

问题描述

我需要帮助解决这个问题 - 什么是JavaScript相反推（）; 办法

I need help on this problem - 'What is the opposite of the JavaScript push(); method?'

好比说我有一个阵列 - VAR exampleArray = ['MYNAME'];

Like say I had a array - var exampleArray = ['myName'];

我想推（）; 字'HI' - exampleArray。推（'你好'）;

如何删除字符串MYNAME从数组？

How do I delete the string 'myName' from the array?

推荐答案

好，你有种问了两个问题。 的反面推（）（因为这个问题的标题）为 POP（）。

Well, you've kind of asked two questions. The opposite of push() (as the question is titled) is pop().

exampleArray.pop（）;

POP（）将 exampleArray 删除最后一个元素并返回该元素 - 在你的情况下，字符串'喜' - 但它不会删除从数组字符串'MYNAME'，因为MYNAME'不是最后一个元素。对于您需要拼接（）或移（）：

pop() will remove the last element from exampleArray and return that element -- in your case, the string 'hi' -- but it will not "delete the string 'myName' from the array" because 'myName' is not the last element. For that you need splice() or shift():

exampleArray.splice（0,1）;

exampleArray.shift（）;

有关更多信息，请参见：<一href=\"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array#Mutator_methods\">https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array#Mutator_methods

For more info, see: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array#Mutator_methods

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