5kyu - The Hashtag Generator.js

// The marketing team is spending way too much time typing in hashtags.
//     Let's help them with our own Hashtag Generator!

// Here's the deal:

// It must start with a hashtag(#).
// All words must have their first letter capitalized.
// If the final result is longer than 140 chars it must return false.
// If the input or the result is an empty string it must return false.

//     Examples
// " Hello there thanks for trying my Kata"  => "#HelloThereThanksForTryingMyKata"
// "    Hello     World   "                  => "#HelloWorld"
// ""                                        => false


function generateHashtag(str) {

    const result = str.trim().split(" ").filter(word => word.match(/[a-z]/gi)).map(word => word.replace(/ /g, '').charAt(0).toUpperCase() + word.slice(1))

    if (result.toString() === "") {
        return false
    } if (result.join("").toString().length > 139) {
        return false
    } else {
        return "#" + result.join('')
    }
}