extract string with regex in scala

Question

I have a use case where I would like to extract certain string from an input in scala.

My input string looks something like:

asdwf:"ssdf", as232:"ss",ABC:"xxx",sdfsf234:"sdaf"

I would like to extract the xxx after ABC.

I tried defining a regex match pattern:
val Pattern = """ABC:"(.*)",""".r, but got ABC:"xxx",sdfsf234:"sdaf" as output string.

Anything I am not doing correctly?

Thanks.

Your input string seem to have some sort of format, do you know which one? Where does it come from? — Pedro Lobito
– Pedro Lobito, Commented Apr 23, 2017 at 0:23

Glavo · Accepted Answer · 2017-04-23 01:04:40Z

3

You can look for matches like this

    val p = """[^ :,"]+[\s]*:"[^"]*"""".r
    p findAllIn """asdwf:"ssdf", as232:"ss",ABC:"xxx",sdfsf234:"sdaf""""

Now you can get an iterator with all the matches.

You can extract their contents like this

    (p findAllIn """asdwf:"ssdf", as232:"ss",ABC:"xxx",sdfsf234:"sdaf"""").map(str => {
        val p(key, value) = str
        (key, value)
    }).toMap

answered Apr 23, 2017 at 1:04

Glavo

5384 silver badges14 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Pedro Lobito · Accepted Answer · 2017-04-23 01:21:21Z

0

Try using a non-greedy expression, i.e.:

val Pattern = """ABC:"(.*?)"""".r

Update:

I'm not a scala user and I cannot test the code, but in theory the following should replace everything with the value of ABC

val res = """ asdwf:"ssdf", as232:"ss",ABC:"xxx",sdfsf234:"sdaf"""".replaceAll(""".*ABC:"(.*?)".*""", "$1")

I took a crash course on scala and the regex seems to work:

https://ideone.com/LAlCc0

edited Apr 23, 2017 at 1:21

answered Apr 23, 2017 at 0:26

Pedro Lobito

99.8k36 gold badges274 silver badges278 bronze badges

2 Comments

ChengXY Over a year ago

It worked! Any way I can just extract the xxx after ABC?

Pedro Lobito Over a year ago

@ChengXY I've update the answer, please take a look.

Collectives™ on Stack Overflow

extract string with regex in scala

2 Answers 2

Comments

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related