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1701 :: Strings, camel case to snake case conversion

• Stefan_Salewski (orginal) [2015-10-08T00:16:44+02:00] view original

  Seems to do not exist, so I wrote this:

  proc camel2snake*(s: string): string {.noSideEffect, procvar.} =
    ## CanBeFun => can_be_fun
    result = newStringOfCap(s.len)
    for i in 0..<len(s):
      if s[i] in {'A'..'Z'}:
        if i > 0:
          result.add('_')
        result.add(chr(ord(s[i]) + (ord('a') - ord('A'))))
      else:
        result.add(s[i])
  
  echo camel2snake "CanBeFun"
  Run

  I wonder if we have iterators for strings as in Ruby, something like "for c in string" maybe? Have not seen that in strutils or manual.

  irb(main):003:0> 'Stefan'.each_char.with_index{|c, i| print c, i}; print "\n"
  S0t1e2f3a4n5
  => nil
  irb(main):004:0> 'Stefan'.each_char{|c| print c}; print "\n"
  Stefan
  => nil

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• Jehan (orginal) [2015-10-08T00:42:58+02:00] view original

  Note that strutils has toLower(c: char): char, so you don't need to fiddle with ord.

  You can iterate over characters in a string, e.g.:

  for ch in "abc":
    echo ch
  Run

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• Stefan_Salewski (orginal) [2015-10-08T00:59:28+02:00] view original

  Great, thanks.

  Both, the iterator and toLower seems to not being used much in strutils, I have not seen it at all.

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