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3225 :: String procs, when to modify in place, when to return modified string, when to return boolean result

• Stefan_Salewski (orginal) [2017-10-05T11:09:33+02:00] view original

  I was recently looking for missing strutils.removePrefix().

  Easy to create of course.

  strutils.removeSuffix() modifies the string in place, which makes much sense, as it only uses setlen().

  But what should a removePrefix() do? The operation is more expensive, one has to create a new string and copy characters, or one has to move characters.

  So should removePrefix() do modification in place or return a modified result? Should it report about success?

  Use case:

  s.removePrefix("GTK_")
    if not s.removePrefix("GTK_"): echo "not a GTK symbol"
    var strippedString =   s.removePrefix("GTK_")
  Run

  Ruby has used proc names terminated with ! for inplace operation. But Nim is not Ruby.

  Should we have prefixRemoved() for modified results and removePrefix() for in place operation?

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• mratsim (orginal) [2017-10-05T14:25:55+02:00] view original

  mremovePrefix

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