Hi gentlemen! What is idiomatic way of doing this ...

# announcements

[sannysanoff]

Hi gentlemen! What is idiomatic way of doing this in Kotlin?
var s : String = (some long expression)
if (s.length > 255) s = s.take(252)+"...";

[leonardootto]

val maxSize = 8
val startPosition = maxSize - 1
print(if (s.length > maxSize) lastPart(startPosition) else s)

[leonardootto]

fun lastPart(startPosition: Int): String {
return (startPosition until s.length).fold(StringBuffer()) { acc, idx ->
acc.append(s.take(idx + 1))
}.toString()
}

[dean]

// might want some error checking
fun String.truncate(maxLen: Int): String =
    if (this.length < maxLen) this else this.take(maxLen-3) + "..."

You can then use
"short".truncate(10) // "short"
"wowthisislong".truncate(10) // "wowthis..."