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Why did you stop reading? The TS version has zero type safety (compiler infers any), whereas the RML version will only accept numeric type arguments.

• kadfak 7y ago
  In Reason let sum = (a, b) => a + b; actually accepts only arguments of type int, not any numeric type. The + operator is defined as let (+): (int, int) => int; To have the function accept floats, for example, you would have to use the +. operator like this let sum = (a, b) => a +. b;
  • mcv 7y ago
    I noticed the article had a tendency to compare numbers in Typescript with integers in ReasonML, and I was wondering why. I guess a clearer distinction between the two can be nice, but then how does that compile to javascript?
    • yawaramin 7y ago
      ReasonML ints and floats both compile to JavaScript numbers. See https://bucklescript.github.io/docs/en/common-data-types#shared https://bucklescript.github.io/docs/en/common-data-types#sha... for a type mapping table.