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How to remove stop words from a string in Kotlin

1 Answer

0 votes
fun main() {
    val input = "a kotlin and java to python a we if c# then a and aa"
    println("Original: $input")

    val words = splitWords(input)
    val filtered = removeStopWords(words)

    println("Filtered: $filtered")
}

// A stopwords list is a collection of commonly used words in a language
// that are often removed during text processing tasks.

val stopWords = listOf(
    "i", "me", "my", "myself", "we", "our", "ours", "ourselves", "you", "your",
    "yours", "yourself", "yourselves", "he", "him", "his", "himself", "she", "her",
    "hers", "herself", "it", "its", "itself", "they", "them", "their", "theirs",
    "themselves", "what", "which", "who", "whom", "this", "that", "these", "those",
    "am", "is", "are", "was", "were", "be", "been", "being", "have", "has", "had",
    "having", "do", "does", "did", "doing", "a", "an", "the", "and", "but", "if", "or",
    "because", "as", "until", "while", "of", "at", "by", "for", "with", "about", "against",
    "between", "into", "through", "to", "from", "in", "out", "on", "off", "over", "further",
    "then", "here", "there", "when", "where", "why", "how", "all", "any", "both", "each",
    "few", "more", "most", "other", "some", "such", "no", "nor", "not", "only", "own",
    "so", "than", "too", "very", "can", "will", "just", "don", "should", "now"
)

fun isStopWord(word: String): Boolean {
    return stopWords.contains(word)
}

fun splitWords(input: String): List<String> {
    return input.trim().split("\\s+".toRegex())
}

fun removeStopWords(words: List<String>): String {
    return words.filterNot { isStopWord(it) }.joinToString(" ")
}

 
  
/*
run:
 
Original: a kotlin and java to python a we if c# then a and aa
Filtered: kotlin java python c# aa

*/

 



answered Jul 18, 2025 by avibootz
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