Hi I would like to convert an Int to an hex string I found t kotlinlang #javascript

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Title

gaetan

04/17/2017, 8:54 AM

Hi. I would like to convert an Int to an hex string. I found the

String.toInt(radix:Int)

but didn’t find the opposite.

konsoletyper

04/17/2017, 8:57 AM

println("FF".toInt(16))

Ah, sorry, now I see

fun Int.toString(radix: Int) = asDynamic().toString(radix)

👍 1

println((255).toString(16))

bamdmux

04/17/2017, 1:00 PM

@gaetan @konsoletyper But it wont work for negative values,

(-12).toString(16)

will return

-c

not

FF...F4

konsoletyper

04/17/2017, 1:01 PM

You can easily work-around this

For example,

(-12 and 0xFF).toString(16)

. Note that Kotlin JVM has the same behaviour

bamdmux

04/17/2017, 2:20 PM

@konsoletyper Yeah, I know thats a JVM problem, just was warning him

And that will print F4,

(-12).and(0xFFFFFFFF).toString(16)

will return

-c

@gaetan If you want to work with hexadecimal representations, your best option will be using List<Byte> and then converting byte to byte

byte.toInt().and(0xFF).toString(16)

gaetan

04/17/2017, 2:27 PM

Thanks for the proposal. In fact, it’s just to convert a color from an Int to its hex string representation.

The @konsoletyper solution do the job.

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