REXX (REstructured eXtended eXecutor) was originally designed for IBM mainframes but later ported to many other systems, highlighting its surprisingly good portability for its time.elaborate
Smalltalk was one of the first object-oriented programming languages to support live coding, meaning code changes could be made and seen in effect immediately without restarting the program.
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Rust's borrow checker, a core part of its compiler, prevents data races at compile time, eliminating a significant class of runtime errors common in other languages.
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SuperCollider's core language, sclang, is dynamically typed, meaning you don't need to explicitly declare variable types, making it faster to prototype and experiment.
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