Is there a kotlinfied `Character getNumericValue ` kotlinlang #getting-started

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Title

k

Kenneth

09/26/2019, 10:42 AM

Is there a kotlinfied

Character.getNumericValue()

?

v

Viktor Penelski

09/26/2019, 10:58 AM

like

'c'.toInt()

?

d

diesieben07

09/26/2019, 11:00 AM

No,

getNumericValue

returns

for

"5"

👍 1

I don't think there is a Kotlin-only version, as it requires large character data tables. These are present in the JDK, but Javascript for example doesn't have an API for it.

r

Ruckus

09/26/2019, 1:39 PM

You could do

char.toString().toInt()

, though it's not optimal.

d

diesieben07

09/26/2019, 1:49 PM

And that also does not cover everything that

getNumericValue

does.

getNumericValue('Ⅱ')

("Roman Numeral Two") returns

.

r

Ruckus

09/26/2019, 1:55 PM

Ah, I was not aware of that. That is a weird function.

k

karelpeeters

09/26/2019, 2:30 PM

Yeah there are lots of these functions in the

Character

class, but I wonder what the purpose is? Is there ever a site where you can type in digits and where Ⅱ is allowed?

Presumably if your code is going to be used in a language with a different number system you'll be using specific input forms for those symbols?

d

diesieben07

09/26/2019, 2:39 PM

That's the JDK for you. You could argue that

java.time

is similarly overengineered with it's support for crazy calendar systems

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