October 2022
Beginner to intermediate
390 pages
7h 5m
Chinese
Content preview from Perl语言入门（第8版）
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列表与数组
｜
61
# @removed
变成
qw(fred barney betty)
#
而原先的
@array
则变成
qw(pebbles dino)
我们可以通过第三个参数指定要操作的元素长度。请再读一遍这句话，很多人想当然
以为第三个参数是结束位置，但实际并非如此，它表示要操作的元素个数，亦即长
度。通过这个参数，我们就可以删掉数组中间的一个片段：
@array = qw( pebbles dino fred barney betty );
@removed = splice @array, 1, 2; #
删除
dino
和
fred
这两个元素
# @removed
变成
qw(dino fred)
#
而
@array
则变成
qw(pebbles barney betty)
第四个参数是要替换的列表。之前我们看到的都是如何从现有的数组拿走元素，其实
你也可以补充新元素到原来的数组中。新加入列表的长度并不一定要和拿走的元素片
段一样长：
@array = qw( pebbles dino fred barney betty );
@removed = splice @array, 1, 2, qw(wilma); #
删除
dino
和
fred
# @removed
变成
qw(dino fred)
# @array
变成
qw(pebbles ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.