(replace st before after)
  st: a str
  before: a str
  after: a str
  returns a str
F

Performs text substitution.

Returns a newly-allocated, mutable string. Its contents will be the same as st, except that each occurence of the before substring will be been replaced with after.

(let st "KEKE IS MOVE")
(prn (replace st "MOVE" "PUSH")) ; prints KEKE IS PUSH
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