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Transformers for the template

To apply a tranformer to a variable provide it after VAR_TRANSFORM_SEP_CHAR (currently “:”) to a variable template.

There are a few transformers available:

TransformerArgumentsFunctionExample
f [format_float][.]Nonly N number of decimal{“1.12”:f(.1)} ⇒ 1.1
case string_caseupUPCASE a string{“na”:case(up)} ⇒ NA
case string_casedowndowncase a string{“nA”:case(down)} ⇒ na
case string_caseproperUpcase the first letter{“nA”:case(proper)} ⇒ Na
case string_casetitleTitle Case the string{“na”:case(title)} ⇒ Na
calc[+-*/^]NAirthmatic calculation{“1”:calc(+1*2^2)} ⇒ 16
calc[+-*/^]NAirthmatic calculation{“1”:calc(+1,-1)} ⇒ 2,0
countstrcount str occurance{“nata”:count(a)} ⇒ 2
repl replacestr1,str2replace str1 by str2{“nata”:rep(a,o)} ⇒ noto
q quote[str1]quote with str1, or “”{“nata”:q()} ⇒ “noto”
takestr,Ntake Nth group sep by str{“nata”:take(a,2)} ⇒ “t”

You can chain transformers ones after another for combined actions. For example, count( ):calc(+1) will give you total number of words in a sentence.

Examples are in individual functions.

Functions

  • Applies any tranformations to the variable, you can chain the transformers Called whenever you use VAR_TRANSFORM_SEP_CHAR to provide a transformer in the template.
  • Gets the bound of a rust range object
  • Airthmatic calculations, the value needs to be float. e.g. {val:calc(+1)} will add 1 to the value. The order of calculation is left to right.
  • Count the number of occurances of a pattern in the string. You can chain it with calc to get the number of word like: {val:count( ):calc(+1)}
  • format the float (numbers). For example with val=1.123, {val:f(2)} or {val:f(.2)} gives 1.12
  • Quote the text with given strings or ""
  • Replace text in the string, by another text
  • Format the string. Supports up=> UPCASE, down=> downcase, proper => first character UPCASE all others downcase, title => title case according to titlecase::titlecase. e.g. {var:case(up)}.
  • Split the text with given separator and then take the Nth group