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package Problems;

import java.util.Arrays;

//Using Java 8 Streams, how do you extract all words from a sentence that contain exactly K vowels?

public class Problem42 {

public static long countVowels(String str){

return str.chars()

.mapToObj(ch->(char) ch)

.filter(ch->"aeiouAEIOU".indexOf(ch)!=-1)

.count();

}

public static void main(String[] args) {

String sentence = "Why only half? Because we compare characters from both ends, no need to go full length.";

int k=3;

// each word vowels count

// Arrays.stream(sentence.split(" "))

// .forEach(str->System.out.println(str+" -> "+countVowels(str)));

// In each word equals to k

Arrays.stream(sentence.split(" "))

.filter(word->countVowels(word)==k)

.forEach(System.out::println);

}

}