BBK#1: Find Middle Element

Don't be a Java-ish dev in Kotlin-ish world, improve your knowledge about Koltin Standard Library and write better Kotlin code. ✌🏻 If your Java dev migrating to Kotlin this will help you learn alot!

Question: Print middle character of a string, if even print middle two characters else middle character

Try it put yourself :
👨🏻‍💻👉 https://www.codewars.com/kata/56747fd5cb988479af000028/train/kotlin

Solution 1:

fun getMiddle(word : String) : String {
	val chars = word.toCharArray()
	val mid = chars.size/2
	return  if(chars.size%2==0){
		"${chars.get(mid-1)}${chars.get(mid)}"
	}else{
		"${chars.get(mid)}"
	}
}

Solution 2:

Using drop
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/drop.html

fun getMiddle(word : String) : String {
	val worldLength = (word.length - 1) / 2
	return word.drop(worldLength).dropLast(worldLength)
}

Solution 3:

Using substring + ranges
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/substring.html

fun getMiddle(word: String): String = word
		.substring((word.length-1)/2 .. word.length/2)

Conclusion

Aim of these articles is not hate on Java, but to help people learn various ways in which they can write same logic better and more Kotlin standard library focused way.

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Until next time. Happy Hacking! 👩‍💻

Solve Next :

BigBrainKotlin - Find Max Min

Don’t be a Java-ish dev in Kotlin-ish world, improve your knowledge about Koltin Standard Library and write better Kotlin code. ✌🏻 If your Java dev migrating to Kotlin this will help you learn a lot!

Chetan guptaAndroidBites