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Challenge 106: Message Validator

curriculum/challenges/english/blocks/daily-coding-challenges-javascript/68ffb91507a5b645769328c9.md

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--description--

Given a message string and a validation string, determine if the message is valid.

  • A message is valid if each word in the message starts with the corresponding letter in the validation string, in order.
  • Letters are case-insensitive.
  • Words in the message are separated by single spaces.

--hints--

isValidMessage("hello world", "hw") should return true.

js
assert.isTrue(isValidMessage("hello world", "hw"));

isValidMessage("ALL CAPITAL LETTERS", "acl") should return true.

js
assert.isTrue(isValidMessage("ALL CAPITAL LETTERS", "acl"));

isValidMessage("Coding challenge are boring.", "cca") should return false.

js
assert.isFalse(isValidMessage("Coding challenge are boring.", "cca"));

isValidMessage("The quick brown fox jumps over the lazy dog.", "TQBFJOTLD") should return true.

js
assert.isTrue(isValidMessage("The quick brown fox jumps over the lazy dog.", "TQBFJOTLD"));

isValidMessage("The quick brown fox jumps over the lazy dog.", "TQBFJOTLDT") should return false.

js
assert.isFalse(isValidMessage("The quick brown fox jumps over the lazy dog.", "TQBFJOTLDT"));

--seed--

--seed-contents--

js
function isValidMessage(message, validator) {

  return message;
}

--solutions--

js
function isValidMessage(message, validation) {
  const words = message.split(" ");
  
  if (words.length !== validation.length) return false;

  for (let i = 0; i < words.length; i++) {
    if (words[i][0].toLowerCase() !== validation[i].toLowerCase()) {
      return false;
    }
  }

  return true;
}