Q:

Example of replaceFirst() function in Kotlin

YasminRadwan26
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2022-07-14
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replaceFirst() Function

The replaceFirst() function returns a new string with the first occurrence of oldChar (string to be replaced) replaced with newChar (string to replace with).

Syntax:

fun String.replaceFirst(
    oldChar: Char,
    newChar: Char,
    ignoreCase: Boolean = false
): String
Kotlin Programming, examples, Kotlin Programming examples,
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YasminRadwan26
2022-07-14
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Kotlin program to demonstrate the example of replaceFirst() function

// Example of replaceFirst() function
fun main()
{
	// Demonstrating the replaceFirst() function
	val pattern = Regex("Hi")

	// Replace all "Hi" with "Hello"
	println(pattern.replaceFirst("Hi, there.", "Hello"))
	println(pattern.replaceFirst("Hi Alex! Please say Hi to Boss.", "Hello"))
	println(pattern.replaceFirst("IncludeHelp", "Okay"))
	println()
}

Output:

Hello, there.
Hello Alex! Please say Hi to Boss.
IncludeHelp

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