String Utilities

Generic string helpers: StartsWith, EndsWith, Contains, PadLeft, Split, and an AsMessage wrapper for UI text.

Original, compile-verified Verse by Bizanator (Biloxi Studios). Clean-room sample you can drop into a UEFN project and adapt.

• # String Utilities — Biloxi Studios Inc.
  #
  # Generic, dependency-free string helpers: case-insensitive checks, prefix/suffix
  # tests, left-padding, simple splitting, and a `message` wrapper for UI text.
  # Written as a module of parametric-free `string`/`[]char` functions.
  #
  # Teaches: iterating chars, building strings, <decides> for boolean-style checks,
  # the <localizes> effect for producing `message` values, and char comparison.
  
  using { /Verse.org/Simulation }
  
  string_utils<public> := module:
  
      # Succeeds when Source starts with Prefix.
      StartsWith<public>(Source:string, Prefix:string)<decides><transacts>:void =
          Prefix.Length <= Source.Length
          Head := Source.Slice[0, Prefix.Length]
          Head = Prefix
  
      # Succeeds when Source ends with Suffix.
      EndsWith<public>(Source:string, Suffix:string)<decides><transacts>:void =
          Suffix.Length <= Source.Length
          Tail := Source.Slice[Source.Length - Suffix.Length, Source.Length]
          Tail = Suffix