Hey I want to remove text from string for example `val string = "Hey 123"` or `val string = "Hey Ho...

# android

[Vivek Modi]

Hey I want to remove text from string for example val string = "Hey 123" or val string = "Hey How are you 123" and output string = 123

[Javier]

string.replace(..., "")

[Javier]

you can combine multiple substringAfter/Before too but passing a regex to the replace is simpler (or easier to read)

[Vampire]

string.replace("""\D++""".toRegex(), "")

[Vivek Modi]

thanks a milllion

[Paul Woitaschek]

Or pure kotlin: filter { it.isDigit }.toInt()

[Vivek Modi]

thanks @Paul Woitaschek

[Vampire]

string.filter { it.isDigit() } actually, but yeah

[Vivek Modi]

okk

[Colton Idle]

You can do this with idiomatic kotlin by creating an extension function.

Untitled.kt

[Paul Woitaschek]

That's a lot of code. You forgot ä

[Paul Woitaschek]

Also there is àā. And add all the special characters. Oh and Unicode 🦄

[Javier]

I swear I read string = "hey 123", if it has only digit, then the string.filter(String::isDigit) is more readable