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4390 :: format table with strutils `%`

• enthus1ast (orginal) [2018-11-20T00:13:34+01:00] view original

  what is the nicest way you know to make this work:

  import strutils
  echo "$foo, $baa" % {"foo": "foofoo", "baa": "baabaa"}
  # foofoo, baabaa
  
  Run

  also, should this maybe be possible in standard Nim? This would be so convenient!

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• citycide (orginal) [2018-11-20T00:49:38+01:00] view original

  I'm sure this is not the most efficient or most all-encompassing way to do it but it's one of the simplest:

  import sequtils, strutils, tables
  
  proc `%` (s: string, subs: openArray[(string, string)]): string =
    var newSubs = newSeqOfCap[string](subs.len * 2)
    for sub in subs:
      newSubs.add(sub[0])
      newSubs.add(sub[1])
    result = format(s, newSubs)
  
  echo "$foo, $baa" % {"foo": "foofoo", "baa": "baabaa"}
  Run

  You can also do "$foo $bar" % ["foo", "foofoo", "bar", "barbar"] today. Handling the table syntax would be neat though, even if we have strformat, since that's compile time only.

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