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pErl suBstr %1

substr 方法 返回一个从指定位置开始,并具有指定长度的子字符串。 参数 start 必眩所需的子字符串的起始位置。字符串中第一个字符的索引为 0。 length 可选项。返回的子字符串中包含的字符数。 备注 如果 length 为 0 或负数,将返回一个空字符

用perl中的截取函数substr 用法 substr($a,0,4)其中$a是要切的,如你说的474.....,从第0位起向 后切四个字符 perl -e 'my $a=474000895745; my $b=substr($a,0,4);print "$b\n";' 4740

open F,"1.txt"; #画面上文件open O,">2.txt"; #保存到2.txt@array=;$count=0;foreach (@array){s/\s+//g;if(/[A-Z]+/){@new=split(undef,$_);}foreach (@new){ $count++; if($count>=10 and $count=30 and $count=60 and $count

测试通过的程序如下: $code="%e3%81%82%e3%81%84111%e9%9d%92"; $n=3; $i=0; $j=0; $new=''; while ($i

if(substr('xxoo',$var)>0)或者 if($var=~/xxoo/)

my $s = "The black cat climbed the green tree"; my $color = substr $s, 4, 5; # black my $middle = substr $s, 4, -11; # black cat climbed the my $end = substr $s, 14; # climbed the green tree my $tail = substr $s, -4; # tree my ...

my $s = "The black cat climbed the green tree"; my $color = substr $s, 4, 5; # black my $middle = substr $s, 4, -11; # black cat climbed the my $end = substr $s, 14; # climbed the green tree my $tail = substr $s, -4; # tree my ...

确保安装 nginx 时 ./configure 有加入 --with-http_perl_module 这一项,然后...{my $red = substr($url, $inx+9,); my $len = index($red, "\x...

用perl中的截取函数substr 用法 substr($a,0,4)其中$a是要切的,如你说的474.....,从第0位起向 后切四个字符 perl -e 'my $a=474000895745; my $b=substr($a,0,4);print "$b\n";' 4740

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