[codewar] the hashtag generator

const plus_arr = function (arrv) {
    var plus = Array.from(arrv);

    plus.splice(0, 0, '#');
    return plus.toString().replace(/,/g, '');
}

const generateHashtag = function (arr1) {
    if (arr1.length == 0) {
        return false;
    }
    const split_arr = arr1.trim().split(' ');

    var hey = split_arr.filter(element => {
        return element.length > 0
    })
    var map_hey = hey.map(v => {
        return v.charAt(0).toUpperCase() + v.slice(1);
    })
    var n = map_hey[0]
    if(n==undefined){return false}
    var n_split = n.split('')
    var change_ma_hey = plus_arr(n_split)
    map_hey.splice(0, 1, change_ma_hey);
    var ff = (map_hey.toString().replace(/,/g, ''))
    if (ff.length > 140) {
        return false;

    }
    return ff

}