How to Capitalize the First Letter of Each Word in a String

function titleCase(str) {   var splitStr = str.toLowerCase().split(' ');   for (var i = 0; i < splitStr.length; i++) {       // You do not need to check if i is larger than splitStr length, as your for does that for you       // Assign it back to the array       splitStr[i] = splitStr[i].charAt(0).toUpperCase() + splitStr[i].substring(1);        }   // Directly return the joined string   return splitStr.join(' '); }
document.write(titleCase("I'm a little tea pot"));

How to capitalize the first character of each word in a string

WordUtils.capitalize(str) (from apache commons-text)

(Note: if you need "fOO BAr" to become "Foo Bar", then use capitalizeFully(..) instead)

How can I capitalize the first letter of each word in a string?

The .title() method of a string (either ASCII or Unicode is fine) does this:

>>> "hello world".title()
'Hello World'
>>> u"hello world".title()
u'Hello World'

However, look out for strings with embedded apostrophes, as noted in the docs.

The algorithm uses a simple language-independent definition of a word as groups of consecutive letters. The definition works in many contexts but it means that apostrophes in contractions and possessives form word boundaries, which may not be the desired result:

>>> "they're bill's friends from the UK".title()
"They'Re Bill'S Friends From The Uk"

Capitalise every word in String with extension function

Since you know capitalize() all you need is to split the string with space as a delimeter to extract each word and apply capitalize() to each word. Then rejoin all the words.

fun String.capitalizeWords(): String = split(" ").map { it.capitalize() }.joinToString(" ")

use it:

val s = "the quick brown fox"
println(s.capitalizeWords())

will print:

The Quick Brown Fox

Note: this extension does not take in account other chars in the word which may or may not be capitalized but this does:

fun String.capitalizeWords(): String = split(" ").map { it.toLowerCase().capitalize() }.joinToString(" ")

or shorter:

@SuppressLint("DefaultLocale")
fun String.capitalizeWords(): String =
    split(" ").joinToString(" ") { it.toLowerCase().capitalize() }

How to capitalize first character of each word in a string?

To capitalize all the words in a sentence, you can use re.sub and re.findall:

import re
def capitalize_string(s):
  return re.sub('(?<=^)[a-z]|(?<=\s)[a-z]', '{}', s).format(*map(str.upper, re.findall('(?<=^)[a-z]|(?<=\s)[a-z]', s)))

strings = ['q w e r  G H J  K  M', 'hello   world  lol', "1 w 2 r 3g"]
result = list(map(capitalize_string, strings))

Output:

['Q W E R  G H J  K  M', 'Hello   World  Lol', '1 W 2 R 3g']

How to capitalize the first letter of a string in dart?

Since dart version 2.6, dart supports extensions:

extension StringExtension on String {
    String capitalize() {
      return "${this[0].toUpperCase()}${this.substring(1).toLowerCase()}";
    }
}

So you can just call your extension like this:

import "string_extension.dart";

var someCapitalizedString = "someString".capitalize();

Return String by capitalizing every first letter of the each word and rest in lower case

I found the solution myself with same approach i started!! Here it is:

   function titleCase(str) {
    var strSplit = (str.split(' '));
    var newLetter = [];   
    var firstLetter;
    var restLetter;
     for(i=0; i <strSplit.length; i++){
      firstLetter = strSplit[i].charAt(0).toUpperCase();        
      restLetter = strSplit[i].slice(1, str.Split).toLowerCase();    
      newLetter.push(firstLetter + restLetter);           
     }  
    return newLetter.join(" ");
  }
  titleCase("I'm a little tea pot");

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