[英]How do I find out if the value of a variable in Perl is a scalar or an array?
[英]How do I splice a scalar variable?
$ab = "asljdhashdklasjkl ;dajs;ld";
我想要$ab
的前10個字符。
可以使用splice
功能嗎?
substr($ab, 0, 10)
在這里閱讀有關substr
函數的更多信息
Substr非常適合您的示例。 Splice在一個陣列上運行,所以你需要往返它:
#!/usr/bin/perl
my ($ab, @ab, @first_ten, $first_ten);
$ab = "asljdhashdklasjkl ;dajs;ld";
@ab = split(//, $ab);
@first_ten = splice(@ab, 0, 10);
$first_ten = join('', @first_ten);
#! /usr/bin/perl
use strict;
my $info = "asljdhashdklasjkl ;dajs;ld";
my @personal = split(//, $info);
print @personal[0..9];
C:\Documents and Settings\Administrator>perl perltest.pl
asljdhashd
C:\Documents and Settings\Administrator>
C:\Documents and Settings\Administrator>type perltest.pl
#! /usr/bin/perl
use strict;
my $info = "asljdhashdklasjkl ;dajs;ld";
my @personal = split(//, $info);
print @personal[0..9];
C:\Documents and Settings\Administrator>
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