Two concurrent string replaces in kotlin string

Question

I have a string with wrong directed paranthesis, I want to replace ( with ) and ) with ( at same time, can I do it with a single replace method or I should use a loop?

For example I have this string : You need extra time ) or money (

Which should be like this : You need extra time ( or money )

Please take a look at my update, it's very beautiful :D

ice1000
– ice1000

2017-12-21 07:19:19 +00:00
Commented Dec 21, 2017 at 7:19 — ice1000
– ice1000, Commented Dec 21, 2017 at 7:19
great! I liked compressed expressions

AVEbrahimi
– AVEbrahimi

2017-12-21 07:47:18 +00:00
Commented Dec 21, 2017 at 7:47 — AVEbrahimi
– AVEbrahimi, Commented Dec 21, 2017 at 7:47
This has little to do with concurrency, no?

voddan
– voddan

2017-12-21 08:04:44 +00:00
Commented Dec 21, 2017 at 8:04 — voddan
– voddan, Commented Dec 21, 2017 at 8:04

ice1000 · Accepted Answer · 2017-12-21 08:21:49Z

2

Yes♂you♂can.

With the help of Regex, you can do a lot of things.

i.e. we have a "()":

"()".replace(Regex("[()]")) {
    when (it.value) {
        "(" -> ")"
        ")" -> "("
        else -> ""
    }
}

And the result is ")(" (I tested it under Kotlin 1.2.10).
This one is very readable.

A one-linear way, more tricky:

"()".replace(Regex("[()]")) { ")("["()".indexOf(it.value[0])].toString() }

This one is unreadable.

edited Dec 21, 2017 at 8:21

answered Dec 21, 2017 at 7:07

ice1000

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2 Comments

Sergio Tulentsev Over a year ago

"is unreadable, but looks better" - wut, this doesn't make sense! :)

ice1000 Over a year ago

I think a one-linear one is always better than a 7-line one... I'll edit it.

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