Is there any idiomatic way to replace strings whic...

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[Pablo]

Is there any idiomatic way to replace strings which can contains parameters?
For instance my string is :

ANIMAL:TYPE:{variable1};NAME:{variable2};AGE:{variable3};FAMILY:{variable4};

Note, perhaps variable4 is null/empty and I have anything there, I mean I should be able to replace with "" if it's not present

[Fleshgrinder]

Kotlin provides Regex.replace that takes a lamda with which you can efficiently perform such replacements.

[Rob Elliot]

I don’t fully understand your example; do you mean this?

val mightBeNull: String? = null
val interpolatedString = "A string with $mightBeNull"

where interpolatedString would resolve to A string with null, but you want A string with ?

If so I can offer two options.
Small but ugly:

val mightBeNull: String? = null
val interpolatedString = "A string with ${mightBeNull ?: ""}"

Or longer but more easy to read:

val mightBeNull: String? = null
val notNull = mightBeNull ?: ""
val interpolatedString = "A string with $notNull"

Personally I prefer the second, I find logic inside `${}`in an interpolated string is hard for me to parse.

[tateisu]

val params = mapOf(
"variable1" to "a",
"variable2" to "",
"variable3" to null,
// "variable4" not defined
)
val str = "ANIMAL:TYPE:{variable1};NAME:{variable2};AGE:{variable3};FAMILY:{variable4};"
val str2 = """\{(\w+)\}""".toRegex().replace( str){ params[it.groupValues[1]] ?: ""}
println(str2)

[Pablo]

Sorry is hard to explain, I have a String as :

ANIMAL:TYPE:{variable1};NAME:{variable2};AGE:{variable3};FAMILY:{variable4};

And I want to change only the variables1,2,3,4 with my data, so I wanted to know if there's an easy way to replace, I mean I know there's a replace function and I could create something like

ANIMATYPEVAR1;NAME:VAR2..

And then just replace this VAR1, VAR2, but I wanted to know more ways to do it.

[Fleshgrinder]

Regex replace is your friend.

[Pablo]

I see... ok thanks