Javascript Challenges - How to Uppercase The First Letter in Each Word

Use Javascript to uppercase the first letter in each word of a given string.

[realcourier]

Hey man. Really love your teaching style! Thanks for the vid

[alanrobbo]

Thank you, i got a little lost, but i found my way back.

[CAMiniVans]

i'm more confused now, weird ending

[joaojvr]

It's wrong! Won't work if the word has the first letter twice or more in it.
Example:
aMaZoN -> AmAzon

Because you're replacing the letter A in the entire word, not the first char.

The correct function that must be inside map is this:

function (val)
{
return
}

It will get the first char, set it to upper case an then concatenate with all chars of the word starting from position 1.