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PatrickMcSweeny's solution

to Pangram in the JavaScript Track

Published at Jul 31 2018 · 0 comments
Instructions
Test suite
Solution

Note:

This exercise has changed since this solution was written.

Determine if a sentence is a pangram. A pangram (Greek: παν γράμμα, pan gramma, "every letter") is a sentence using every letter of the alphabet at least once. The best known English pangram is:

The quick brown fox jumps over the lazy dog.

The alphabet used consists of ASCII letters a to z, inclusive, and is case insensitive. Input will not contain non-ASCII symbols.

Setup

Go through the setup instructions for JavaScript to install the necessary dependencies:

http://exercism.io/languages/javascript/installation

Running the test suite

The provided test suite uses Jasmine. You can install it by opening a terminal window and running the following command:

npm install -g jasmine

Run the test suite from the exercise directory with:

jasmine pangram.spec.js

In many test suites all but the first test have been marked "pending". Once you get a test passing, activate the next one by changing xit to it.

Source

Wikipedia https://en.wikipedia.org/wiki/Pangram

Submitting Incomplete Solutions

It's possible to submit an incomplete solution so you can see how others have completed the exercise.

pangram.spec.js

var Pangram = require('./pangram');

describe('Pangram()', function ()  {
  it('sentence empty', function () {
    var pangram = new Pangram('');
    expect(pangram.isPangram()).toBe(false);
  });

  xit('recognizes a perfect lower case pangram', function ()  {
    var pangram = new Pangram('abcdefghijklmnopqrstuvwxyz');
    expect(pangram.isPangram()).toBe(true);
  });

  xit('pangram with only lower case', function ()  {
    var pangram = new Pangram('the quick brown fox jumps over the lazy dog');
    expect(pangram.isPangram()).toBe(true);
  });

  xit("missing character 'x'", function () {
    var pangram = new Pangram('a quick movement of the enemy will jeopardize five gunboats');
    expect(pangram.isPangram()).toBe(false);
  });

  xit("another missing character, e.g. 'h'", function () {
    var pangram = new Pangram('five boxing wizards jump quickly at it');
    expect(pangram.isPangram()).toBe(false);
  });

  xit('pangram with underscores', function () {
    var pangram = new Pangram('the_quick_brown_fox_jumps_over_the_lazy_dog');
    expect(pangram.isPangram()).toBe(true);
  });

  xit('pangram with numbers', function () {
    var pangram = new Pangram('the 1 quick brown fox jumps over the 2 lazy dog');
    expect(pangram.isPangram()).toBe(true);
  });

  xit('missing letters replaced by numbers', function ()  {
    var pangram = new Pangram('7h3 qu1ck brown fox jumps ov3r 7h3 lazy dog');
    expect(pangram.isPangram()).toBe(false);
  });

  xit('pangram with mixed case and punctuation', function ()  {
    var pangram = new Pangram('\"Five quacking Zephyrs jolt my wax bed.\"');
    expect(pangram.isPangram()).toBe(true);
  });

  xit('upper and lower case versions of the same character should not be counted separately', function ()  {
    var pangram = new Pangram('the quick brown fox jumps over with lazy FX');
    expect(pangram.isPangram()).toBe(false);
  });
});
const alphabet = "abcdefghijklmnopqrstuvwxyz";

var Pangram = function(input) {
  this.input = input.toLowerCase();
};

Pangram.prototype.isPangram = function(){
  var input = this.input;
  return alphabet.split("").every(function(letter) {
    return input.includes(letter);
  });
};

module.exports = Pangram;

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