Q:

Example of findAll() function in Kotlin

YasminRadwan26
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2022-07-14
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findAll() Function

The findAll() function returns a sequence of all occurrences of a regular expression within the input string, beginning at the specified startIndex.

Syntax:

fun findAll(
    input: CharSequence,
    startIndex: Int = 0
): Sequence<MatchResult>
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YasminRadwan26
2022-07-14
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Kotlin program to demonstrate the example of findAll() function

// Example of findAll() function
fun main()
{
	// Regex to match a 5 letters pattern 
	// beginning with He
	val pattern = Regex("He...")
	val res1 : Sequence<MatchResult> = pattern.findAll("Hello, World!", 0)

	// Prints all the matches using forEach loop
	res1.forEach()
	{
		matchResult -> println(matchResult.value)
	}
	println()

	val res2 : Sequence<MatchResult> = pattern.findAll("Hello, I'm saying Hello Boss!", 0)

	// Prints all the matches using forEach loop
	res2.forEach()
	{
		matchResult -> println(matchResult.value)
	}
	println()    
}

Output:

Hello

Hello
Hello

Explanation:

In the first statement "Hello" is there one time, and in the second statement "Hello" is there two times.

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