Is Pangram

Given a sentence, check whether it is a pangram or not.

Explanation

For sentence = “The quick brown fox jumps over the lazy dog.”, the output should be

isPangram(sentence) = true.

For sentence = “Hello World!”, the output should be

isPangram(sentence) = false.

Solution

public class PangramVerifier {

  private static final int ASCII_ALPHABET_SUM = 2015;

  private Boolean isPangram(String quote){
    Integer sum = quote.toUpperCase().chars().filter(x -> x > 64 & x < 91).distinct().sum();
    return sum == ASCII_ALPHABET_SUM;
  }

  public static void main(String[] args){
    String quote = "The quick brown fox jumps over the lazy dog";
    Boolean result = new PangramVerifier().isPangram(quote);
    assert result;
  }

}

To download the code:

git clone https://github.com/josdem/algorithms-workshop.git
cd is-pangram

To run the code:

javac PangramVerifier.java
java -ea PangramVerifier

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