Greppability is an underrated code metric

Re:Greppability is an underrated code metric by benrutter on Tuesday September 03, 2024 @02:16PM (#41437534)

I'm not a javascript programmer, but I really like the arrow pattern from a distance exactly because it enforces that idea.

My experience is that newcomers are often thrown off and confused by higher order functions. I think partly because, well let's be honest they just are more confusing than normal functions, but I think it's also because languages often bind functions differently from everything else.

`const cool = () => 5`

Makes it obvious and transparent, that `cool' is just a variable where as:

`function cool() {return 5}`

looks very different from other variable bindings.

[ Parent | on HN ]

Re:Greppability is an underrated code metric by throwitaway1123 on Tuesday September 03, 2024 @03:38PM (#41438379)

Since we're on the topic of higher order functions, arrow functions allow you to express function currying very succinctly (which some people prefer). This is a contrived example to illustrate the syntactical differences:

  const arrow = (a) => (b) => `${a}-${b}`
  
  function verbose(a) {
    return function (b) {
      return `${a}-${b}`
    }
  }
  
  function uncurried(a, b) {
    return `${a}-${b}`
  }
  
  const values = ['foo', 'bar', 'baz']
  values.map(arrow('qux'))
  values.map(verbose('qux'))
  values.map(uncurried.bind(null, 'qux'))
  values.map((b) => uncurried('qux', b))

[ Parent | on HN ]