[Perl] subroutine
作者: reistlin
来源: http://www.reistlin.com/blog/28
更新时间: 2010.07
版权声明: 原创文章.转载请保留作者信息和原文完整.谢绝任何方式的摘要
[https://reistlin.googlecode.com/svn/trunk/]
1. Print Array - 打印数组
&print_array("数组")
#!/usr/bin/perl -w
use strict;
use Data::Dumper;
# Debug Switch
my $debug = 0;
sub print_array {
my @array = @_;
my $index;
for ( $index = 0; $index < @array; $index++ ) {
print "$array[$index] \n";
}
}
# 测试
my @test = (1,2,3,4,5,6,7,8,9,0);
&print_array(@test);
#!/usr/bin/perl -w
use strict;
use Data::Dumper;
# Debug Switch
my $debug = 0;
sub print_array {
my @array = @_;
foreach my $tmp (@array) {
print "$tmp \n";
}
}
# 测试
my @test = (1,2,3,4,5,6,7,8,9,0);
&print_array(@test);
2. Print Hash - 打印哈希
&print_hash("哈希")
#!/usr/bin/perl -w
use strict;
use Data::Dumper;
# Debug Switch
my $debug = 0;
sub print_hash {
my %hash = @_;
while ( my ($key, $value) = each %hash ) {
print "$key => $value\n";
}
}
# 测试
my %test = (a=>1, b=>2, c=>3);
&print_hash(%test);
3. Last Digits - 取字符串后"n"位
&last_digits("字符串", "位数")
#!/usr/bin/perl -w
use strict;
use Data::Dumper;
# Debug Switch
my $debug = 0;
sub last_digits () {
my $string = shift;
my $digits = shift;
my $length = length($string);
if ($length > $digits) {
print substr($string, $length - $digits, $digits);
}
}
# 测试
&last_digits("987654321", "3");
