Hi I was wondering is there something shorter for `CharSeque kotlinlang #announcements

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Fré Dumazy

10/05/2017, 10:24 AM

Hi, I was wondering, is there something shorter for

CharSequence.takeIf { it.isNotBlank() }?.let { doSomethingWithThis(it) }

to execute code only if a String or CharSequence is not null or blank?

nil2l

10/05/2017, 10:32 AM

CharSequence.run { if (isNotBlank()) doSomethingWithThis(this) }

Fré Dumazy

10/05/2017, 10:37 AM

Perhaps, but I was looking for something less verbose. I had to change to String instead of CharSequence. Eventually I think i'll write an extension function: inline fun String.useNotBlank(block: (String) -> Unit): Boolean { return this.takeIf { it.isNotBlank() }?.let(block) != null }

genovich

10/05/2017, 10:37 AM

CharSequence?.takeIf(CharSequence::isNotBlank)?.let { doSomethingWithThis(it) }

Fré Dumazy

10/05/2017, 10:37 AM

then I can just use "my text".useNotBlank { doSomethingWithThis(it) }

genovich

10/05/2017, 10:38 AM

You can create your own extension method

Fré Dumazy

10/05/2017, 10:39 AM

Thanks, I'll do that!

genovich

10/05/2017, 10:41 AM

fun CharSequence?.useNotBlank(block: (CharSequence) -> Unit): CharSequence? =
        this?.takeIf(CharSequence::isNotBlank)?.also(block)

👍 1

@Fré Dumazy

elect

10/05/2017, 1:52 PM

fun CharSequence?.doSomethingIfValid() {
   if(this != null && this.isNotBlank())
      doSomethingWithThis(this)
}

CharSequence.doSomethingIfValid()

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