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refactor: CountWords (#5428)

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* refactor: CountWords

* checkstyle: fix formatting

---------

Co-authored-by: alxkm <alx@alx.com>
This commit is contained in:
Alex Klymenko
2024-08-28 22:34:46 +02:00
committed by GitHub
parent a23e9b0ba8
commit e2aaefebd5
2 changed files with 36 additions and 33 deletions
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25
src/main/java/com/thealgorithms/others/CountWords.java
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@ -8,17 +8,26 @@ public final class CountWords {
}
/**
* @brief counts the number of words in the input string
* Counts the number of words in the input string. Words are defined as sequences of
* characters separated by whitespace.
*
* @param s the input string
* @return the number of words in the input string
* @return the number of words in the input string, or 0 if the string is null or empty
*/
public static int wordCount(String s) {
if (s == null || s.isEmpty()) {
return 0;
}
return s.trim().split("[\\s]+").length;
return s.trim().split("\\s+").length;
}
/**
* Removes all special characters from the input string, leaving only alphanumeric characters
* and whitespace.
*
* @param s the input string
* @return a string containing only alphanumeric characters and whitespace
*/
private static String removeSpecialCharacters(String s) {
StringBuilder sb = new StringBuilder();
for (char c : s.toCharArray()) {
@ -30,12 +39,12 @@ public final class CountWords {
}
/**
* counts the number of words in a sentence but ignores all potential
* non-alphanumeric characters that do not represent a word. runs in O(n)
* where n is the length of s
* Counts the number of words in a sentence, ignoring all non-alphanumeric characters that do
* not contribute to word formation. This method has a time complexity of O(n), where n is the
* length of the input string.
*
* @param s String: sentence with word(s)
* @return int: number of words
* @param s the input string
* @return the number of words in the input string, with special characters removed, or 0 if the string is null
*/
public static int secondaryWordCount(String s) {
if (s == null) {