Title case a sentence?

Question

I\'m trying to proper case a string in javascript - so far I have this code: This doesn\'t seem to capitalize the first letter, and I\'m also stuck on how to lowercase all the l

Answer 1

function titleCase(str){
    var strToArray = str.split(" ");
    var newArray = [];       

    for(var i=0; i < strToArray.length; i++){
        var element = strToArray[i].replace(strToArray[i][0], strToArray[i][0].toUpperCase());
        newArray.push(element);
    }

    return (newArray.join(" "));
}

Answer 2

One of the cleanest ways I can come up with, using ES6, while still lacking a proper .capitalize() string prototype method:

let sent = "these are just some words on paper"
sent.split(' ').map ( ([h, ...t]) => h.toUpperCase() + t.join('').toLowerCase() )

Uses destructuring on array element strings to obtain head and tail via spread operator (making tail a sequence of characters) which are first joined before coerced to lower case. Or you could replace that with a s => s[0].toUpperCase() + s.substring(1).toLowerCase() I guess. Oh, since the question seems to indicate ES5, transformation is cheap although noticeably more verbose:

function capitalize (sentence) {
    return sentence.split(' ').map(
        function (s) {
            return s[0].toUpperCase() + s.substring(1).toLowerCase()      
        }).join(' ') ;
}

That is, assuming you'd want another sentence returned.

Answer 3

function titleCase(str) {
  var newArr = str.toLowerCase().split(" "), 
  firstLetter, 
  updArr = [];
  for(var i=0;i<newArr.length;i+=1){
    firstLetter = newArr[i].slice(0,1);
    updArr.push(newArr[i].replace(firstLetter, firstLetter.toUpperCase()));
  }
  return updArr.join(" ");
}

Answer 4

First all become lowercase, and then open each word, and then open each letter, the first letter set capital, and then together

function titleCase(str) {
  var copy=str;
  copy=copy.toLowerCase();
  copy=copy.split(' ');
  for(var i=0;i<copy.length;i++){
    var cnt=copy[i].split('');
    cnt[0]=cnt[0].toUpperCase();
    copy[i]=cnt.join('');
    
    
  }
  str=copy.join(' ');
  return str;
}

titleCase("I'm a little tea pot");

Answer 5

My Solution

function titleCase(str) {

var myArr = str.toLowerCase().split(" ");

for (var a = 0; a < myArr.length; a++){
     myArr[a] = myArr[a].charAt(0).toUpperCase() + myArr[a].substr(1);
  }

  return myArr.join(" ");
}

Answer 6

function titleCase(str) {
    var titleStr = str.split(' ');

    for (var i = 0; i < titleStr.length; i++) {

        titleStr[i] = titleStr[i].charAt(0).toUpperCase() + titleStr[i].slice(1).toLowerCase();

    }

    return titleStr.join(' ');
}

titleCase("i'm a little tea pot")