Final code example

Question

This is my code for the Title Case script. I added an array with words that should be in lowercase (unless it's the first word). If you have a better way of doing this, please let me know.

var lowercase = ['the', 'a', 'an', 'and', 'but', 'or', 'on', 'in', 'with', 'to', 'at', 'under', 'near', 'for'];

function titleCase(title) {
    var words = title.split(' ');
    var titleCaseWords = words.map(function(word) {
            return word[0].toUpperCase() + word.substring(1).toLowerCase();
    });
    for(var i = 1; i < titleCaseWords.length; i++) {
        for(var j = 0; j < lowercase.length; j++) {
            if(titleCaseWords[i].toLowerCase() === lowercase[j]) {
                titleCaseWords[i] = titleCaseWords[i].toLowerCase();
            }
        }
    }
    console.log(titleCaseWords.join(' '));
}

titleCase('the CALL fOR help At the airPORt');

Answer 1 · 2017-05-10T14:56:19Z

May 10, 2017 2:56pm

Nice job handling the lowercase words.

Here's my one liner (just for titlecasing every word):

const titleCase = title => title.toLowerCase().split(' ').map(word => `${word[0].toUpperCase()}${word.substring(1)}`).join(' ');

Answer 2 · 2017-09-25T13:35:19Z

September 25, 2017 1:35pm

Nice, thanks for the post, I also did the array for connection-words but instead of the loop I used an if-else statement

var expect = require('chai').expect


function titleCase(title){
  connectionWords =["of", "and", "from", "in", "on", "a", "the"]
  words = title.split(" ")
  titleCasedWords = words.map(function(word, index){ 

    if  (connectionWords.includes(word.toLowerCase())

      &&
        index!=0)
{
      return word.toLowerCase()

    } else {

      return word[0].toUpperCase() + word.substring(1).toLowerCase()
    }
  })
  return titleCasedWords.join(" ")

}

expect(titleCase('the towers of the city of London')).to.equal('The Towers of the City of London')

Answer 3 · 2018-08-28T13:52:11Z

August 28, 2018 1:52pm

Nice examples! For mine, I added some logic to uppercase the connector words if they're at the beginning of the title ('i.e. The Squid and the Whale') by adding the index parameter to the map() call.

const {expect} = require('chai');

const connectorWords = ['a', 'an', 'and', 'at', 'but', 'for', 'in', 'near', 'on', 'or', 'the', 'to', 'under'];

function titleCase(title) {
  // lowercase entire title and split into words
  const words = title.toLowerCase().split(' ');
  // include index parameter in map()
  const titleCasedWords = words.map((word, index) => {
    // if word isn't in connectorWords array OR it's the first word in the title
    if (!connectorWords.includes(word) ||
        index === 0) {
      // uppercase the first letter
      word = word[0].toUpperCase() + word.substring(1);
    }
    return word;
  });
  return titleCasedWords.join(' ');
}

expect(titleCase('the great mouse detective')).to.be.a('string');
expect(titleCase('a')).to.equal('A');
expect(titleCase('vertigo')).to.equal('Vertigo');
expect(titleCase('the great mouse detective')).to.equal('The Great Mouse Detective');
// unit test for connector words
expect(titleCase('marley and me')).to.equal('Marley and Me');
// unit test for connector words at beginning of title
expect(titleCase('the squid and the whale')).to.equal('The Squid and the Whale');

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Final code example

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