A modern programming language that makes developers happier.

kotlinlang

we already have nice `to&lt;Type&gt;OrNull()` string extensions <https://github.com/Kotlin/KEEP/blob/master/proposals/stdlib/string-to-number.md>
But don't you think it would a good idea to add generalized version of 'try-or-null' to stdlib? like:
```
val date = tryOrNull { myAwesomeDateTimeParser.parse("2017-13-32") }
```
which is equal to:
```
val date = try { myAwesomeDateTimeParser.parse("2017-13-32") } catch(e: Exception) { null }
```

brk: catching the exception has awful performance and is an anti-pattern

In cases like yours I think it is better to try and find an API which does not throw exceptions

yeah, i know, but in some cases it's reasonable. just like `toIntOrNull()`: I bet you don't want to know the exact reason every time you string doesnt fit into an int

`toIntOrNull()` doesn't catch an exception

we spoiled a lot of blood to get it :wink:

The general rule is that you don't put nice easy-to-use methods into stdlib if they have performance problems

oh, thanks, got it. just curious: how times does it slower to use `try {x.toInt()} catch { null }` instead of current implementation of `toIntOrNull()` which parses string by its own?

A comprehensive reading: <https://shipilev.net/blog/2014/exceptional-performance/>