A Javascript journey with only six characters

Re:A Javascript journey with only six characters by catscratch on Saturday October 08, 2016 @11:02AM (#12667150)

That's succinct, but less clear than the Ruby version, imo, as you don't have any scope indicators required for the function body.

JS:

  let f = (a,b,c) => a * b ^ c;
  f(2,3,4);

vs. Ruby:

  f = ->(a,b,c) { a * b ^ c }
  f.(2,3,4)

Ruby's shorter and clearer. But, when you use the Ruby lambda more than once in the code, you lose the brevity advantage, because of the "extra" dot. But, in Ruby I use methods more than lambdas, which would be:

  def f(a,b,c) { a * b ^ c }
  f(2,3,4)

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Re:A Javascript journey with only six characters by notyourwork on Saturday October 08, 2016 @02:45PM (#12668062)

> Ruby's shorter and clearer.

I would say the different is negligible here and claiming one is more clear than the other is purely preferential. Coming from a JS background the JS is more clear but not substantially enough for me to claim it is outright more clear a language syntax. Someone coming from a ruby background may argue the other direction.

Some languages are quite different but you are splitting hairs here and trying to be conclusive about it.

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Re:A Javascript journey with only six characters by qaq on Saturday October 08, 2016 @11:27AM (#12667245)

None is preventing you from writing let f = (a,b,c) => {a * b ^ c}; in JS

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Re:A Javascript journey with only six characters by 1000hz on Saturday October 08, 2016 @12:33PM (#12667517)

when you include curly braces in arrow functions you lose the implicit return, so this function would return undefined

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Re:A Javascript journey with only six characters by johnhenry on Saturday October 08, 2016 @01:20PM (#12667730)

You can get the implicit return if you use parentheses instead:

f = (a,b,c) => (a * b ^ c)

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Re:A Javascript journey with only six characters by qaq on Saturday October 08, 2016 @12:35PM (#12667522)

very true :)

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Re:A Javascript journey with only six characters by 8note on Saturday October 08, 2016 @01:42PM (#12667816)

the ruby versions isnt shorter though; you just included things you dont need: semi colons and 'let'

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