Message from JavaScript discussions

September 2018

— What do you wish to learn?

—

Maybe "Functional Thinking", as it states on one item from that list. actually, drop a link what you think is best you have read from functional programming.

— I haven't read that much, I mostly watch talks and such

— Okay, i see

— What you didnt hear, that imperative blocks of code, that reuse same variables, passing output to each other in last variable, maybe considered monad, pure functional why not.

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— You can do impure code inside functions no problem

— As long as they have a pure interface

—

const map = (list, fn) => {
  const result = [];
  for (const item of list) {
    result.push(fn(item));
  }
  return result;
};

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— This is clearly imperative

— But the function itself is pure

— When called

— Since:
* There is no state between calls
* It will always return the same output for the same input