Hi blaui,

first, a comment on the code that you've shown. This:

(undef,$tmp) = split(/=/,$tmp[5]);
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does not work with the string example that you have provided. In fact, worse than that, $tmp[5] is not defined at this point with the code that you have shown.

Next, I definitely agree with my fellow monks above that using a regex to capture the numerical value between the = sign and the opening square bracket is the simplest solution.

If, however, you want to continue using split, take a look at this possible solution illustrated under the Perl debugger:

  DB<1> $temp = "BCInletTemperature = 90[C]";

  DB<2> (undef,$tmp) = split /=/, $temp;

  DB<3> print $tmp
 90[C]
  DB<4> temperature = (split /\[/, $tmp)[0];

  DB<5> p $temperature
 90
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Note however that with this solution, the $temperature variable will contain leading space:

  DB<6> p "<$temperature>";
< 90>
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which may or may not be a problem for you, depending on what you do afterwards with that variable.

It is quite easy to get rid of that leading space if needed, but the simplest way is to use a regex. So, why not start with a simple regex anyway?