I was working on something where I wanted to swap letter-pairs, each letter pair in a string, and I came up with this, which works: 
$string = "thisisatest";
for($x=0;$x<(length($string)-1);$x++){
  $temp = $string;
  substr($temp,$x,1) = substr($string,($x+1),1);
  substr($temp,($x+1),1) = substr($string,$x,1);
  print $temp, "\n";
}

[download]

Output: 
htisisatest
tihsisatest
thsiisatest
thiissatest
thissiatest
thisiastest
thisistaest
thisisaetst
thisisatset
thisisatets

[download]

But I was just wondering if there's a more Perlish way to do it that's not occurring to me?
-- 
($_='jjjuuusssttt annootthheer
     pppeeerrrlll haaaccckkeer')=~y/a-z//s;print;

[download]

In reply to Transposition of each letter pair in string by Cody Pendant

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