CODEWITHSUNDEEP
stringkotlin
4ndro1d
4ndro1d

Reputation: 2976

Extract substring between given strings

Given the following string: be_de=Interessant für Dich; be_fr=Intéressant pour toi;

What is the nicest way to extract the substring for a given locale in Kotlin? e.g. I have given the locale be_fr I want to have Intéressant pour toi as a result. The string is always in between the locale followed by a = and a ;

There could be more locales with strings given, and the position of the value to extract always varies.

Of course I could just create a substring after the first index of my locale and then search for the fist index of the semicolon, but I assume there is a more elegant way like using removeSurrounding, which I can't think of atm.

Upvotes: 28

Views: 22859

Answers (2)

CoolMind
CoolMind

Reputation: 28793

val s = "be_de=Interessant für Dich; be_fr=Intéressant pour toi;"
val result = s.substringAfter("be_fr=", "").substringBefore(";")
println(result)

Intéressant pour toi

Notice that I use ("be_fr=", "").

If the sample doesn't contain be_fr= you will get an empty string. If you use the solution of @zsmb13 you will get be_de=Interessant für Dich.

Upvotes: 0

zsmb13
zsmb13

Reputation: 89578

I don't think removeSurrounding applies here, as you can only remove text with that if you know exactly the entire prefix and suffix to remove.

I'd go with this, as it's very easy to read:

val result = data.substringAfter("be_fr=").substringBefore(';')

Upvotes: 78

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