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0 pointsV-23y ago0 comments

True. In Kotlin you can go

    val foo = if (bar) "this" else "that"

and you don't need two separate assignments.

0 comments

thegeekpirate3y ago

For comparison, in Go it would be:

    foo := func() string {
        if bar { return "this" }
        return "that"
    }()

Beltalowda3y ago

Bit of an odd use of an anonymous function IMO. Normally I'd write that as:

  foo := "that"
  if bar {
      foo = "that"
  }

Unless the assignment of "foo" is expensive, then you'd assign it in an else.

If you really want to, you can do it in a single line too:

  foo := map[bool]string{true: "this", false: "that"}[bar]

V-2OP3y ago

These are rather nasty workarounds, to be honest. Instantiating a map out of the blue is clever, but not very readable (not to mention potential performance concerns eg. if it's code executing in a large loop), and something I'd definitely call out in code review. Note that computing "this" and "that" could by itself be costly, and one of these values is guaranteeed to get discarded.

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thegeekpirate3y ago

I was simply giving an example of only using a single assignment, as the parent stated:

> and you don't need two separate assignments.

Although I do use it far more often nowadays than a decade ago. I've even mentioned it before https://news.ycombinator.com/item?id=30384835.

j / k navigate · click thread line to collapse

0 comments

thegeekpirate3y ago

For comparison, in Go it would be:

    foo := func() string {
        if bar { return "this" }
        return "that"
    }()

Beltalowda3y ago

Bit of an odd use of an anonymous function IMO. Normally I'd write that as:

  foo := "that"
  if bar {
      foo = "that"
  }

Unless the assignment of "foo" is expensive, then you'd assign it in an else.

If you really want to, you can do it in a single line too:

  foo := map[bool]string{true: "this", false: "that"}[bar]

V-2OP3y ago

1 more reply

thegeekpirate3y ago

I was simply giving an example of only using a single assignment, as the parent stated:

> and you don't need two separate assignments.

Although I do use it far more often nowadays than a decade ago. I've even mentioned it before https://news.ycombinator.com/item?id=30384835.

j / k navigate · click thread line to collapse