Question

How to check if two strings are anagram (same letters different words) in Kotlin

Answer 1

fun areAnagram(s1: String, s2: String): Boolean {
    if (s1.length != s2.length) return false

    val freq = mutableMapOf<Char, Int>()

    for (ch in s1) {
        freq[ch] = freq.getOrDefault(ch, 0) + 1
    }

    for (ch in s2) {
        val count = freq[ch] ?: return false
        if (count == 1) {
            freq.remove(ch)
        } else {
            freq[ch] = count - 1
        }
    }

    return freq.isEmpty()
}

fun main() {
    println(if (areAnagram("kotlin", "linkot")) "yes" else "no")
    println(if (areAnagram("kotlin", "tinlok")) "yes" else "no")
    println(if (areAnagram("kotlin", "katlin")) "yes" else "no")
}



/*
run:

yes
yes
no

*/

 

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