A modern programming language that makes developers happier.

kotlinlang

This _is_ ridiculous, but I simply cannot figure out how to get a String from a specified codepoint in Kotlin/JS. I have many codepoints, and I need to make them into a String. And I can't find a way to do it in Kotlin/JS...in fact, all (two) constructors for `String` are deprecated in Kotlin/JS!

UTF-16 units or full (32-bit) Unicode codepoints? the former can be handled with `.concatToString()`; the latter has no built-in support

although I think you could sneakily
```js("String.fromCodePoint").apply(null, codepoints).unsafeCast&lt;String&gt;()```

Yeah, doing 32-bit codepoints. I was hoping for a platform-agnostic solution, but I suppose that will work. Thanks.

building your own
```buildString {
    for (codepoint in codepoints) {
        if (codepoint and 0xFFFF.inv() == 0) {
            append(codepoint.toChar())
        } else {
            append((0xD800 or (codepoint and 0xFFC00 shr 10)).toChar())
            append((0xDC00 or (codepoint and 0x3FF)).toChar())
        }
    }
}```
would be cross-platform

i assume that's converting it to UTF-8, and then appending the surrogate pairs?

directly converting UTF-32 to UTF-16… but I forgot to shift

the else clause should have `(codepoint - 0x10000)`

<https://en.wikipedia.org/wiki/UTF-16#Code_points_from_U+010000_to_U+10FFFF>