Hello! Does stdlib contains multiplatform String.f...

# stdlib

[PHondogo]

Hello! Does stdlib contains multiplatform String.format(string, args) function?

[ephemient]

https://youtrack.jetbrains.com/issue/KT-25506

[CLOVIS]

Note that string interpolation works on all platforms.

[PHondogo]

Yes. I need for runtime provided string with args.

[CLOVIS]

Out of curiosity, what's the use case?

[PHondogo]

In db there are string templates. And there is context info that flat mapped to array of values.

[ephemient]

you could build your own mini-formatter like

fun String.format(vararg args: Any?): String = buildString {
    var index = 0
    var position = 0
    while (position < [e-mail]) {
        val next = [e-mail]('%', startIndex = position)
        if (next < 0) break
        append([e-mail](position, next))
        when (val c = [e-mail](next + 1)) {
            '%' -> append('%')
            's' -> append(args[index++])
            'd' -> append((args[index++] as Number).toInt())
            'l' -> append((args[index++] as Number).toLong())
            'e', 'f', 'g' -> append((args[index++] as Number).toDouble())
            else -> throw IllegalArgumentException(if (c == null) "%" else "%$c")
        }
        position = next + 2
    }
    append([e-mail](position))
}

but supporting the full set of features that the Java string formatter has (which Kotlin/JVM simply delegates to) is challenging

[PHondogo]

Yes. I've done someting like this. Just wanted to be sure that I'm not doing things stdlib already have.