如何使用Perl Array Pop（）函数

缺乏、安全感 2022-12-06 15:40 187阅读 0赞

When writing a [Perl][] script you might find it handy to use the **pop()** function, which looks like this:

在编写[Perl][]脚本时，您可能会发现使用**pop()**函数很方便，如下所示：

Perl's **pop()** function is used to remove and return (or pop) the last element from an array, which reduces the number of elements by one. The **last element** in the array is the one with the highest index. It's easy to confuse this function with [shift()][shift], which removes the **first** element from an array.

Perl的**pop()**函数用于从数组中删除并返回(或弹出)最后一个元素，这将元素数量减少了一个。 数组中的**最后一个元素**是索引最高的**元素** 。 将此函数与[shift()][shift]混淆很容易，该函数从数组中删除了**第一个**元素。

## 使用Perl Pop()函数的示例 **(** An Example of Using the Perl Pop() Function **)** ##

If you think of an [array][] as a row of numbered boxes, going from left to right, it would be the element on the far right. The pop() function would cut the element off the right side of the array, return it, and reduce the elements by one. In the examples, the value of **$oneName** becomes '**Moe**', the last element, and @myNames is shortened to **('Larry', 'Curly')**.

如果将[数组][array]视为一排带编号的框(从左到右)，它将是最右边的元素。 pop()函数将元素从数组的右侧切下，将其返回，并将元素减少一。 在示例中， **$ oneName**的值变为最后一个元素' **Moe** '，并且@myNames缩短为**('Larry'，'Curly')** 。

The array can also be thought of as a [stack][]—picture of a stack of numbered boxes, starting with 0 on the top, and increasing as it goes down. The pop() function would pop the element off the bottom of the stack, return it, and reduce the elements by one.

该阵列也可以被看作是一个[堆栈][stack]的编号盒的堆叠的-图片，从0开始在上面，并增加，因为它会下降。 pop()函数会将元素从堆栈底部弹出，将其返回，并将元素减少一。

> 翻译自: [https://www.thoughtco.com/perl-array-pop-function-quick-tutorial-2641150][https_www.thoughtco.com_perl-array-pop-function-quick-tutorial-2641150]

[Perl]: https://www.thoughtco.com/how-to-install-and-run-perl-2641103
[shift]: https://www.thoughtco.com/perl-array-shift-function-quick-tutorial-2641153
[array]: https://www.thoughtco.com/perl-array-grep-function-quick-tutorial-2641158
[stack]: https://www.thoughtco.com/definition-of-stack-in-programming-958162
[https_www.thoughtco.com_perl-array-pop-function-quick-tutorial-2641150]: https://www.thoughtco.com/perl-array-pop-function-quick-tutorial-2641150