utils.js

//convert string to words
module.exports = {

    toWords: function (input) {
        var regex = /[A-Z\xC0-\xD6\xD8-\xDE]?[a-z\xDF-\xF6\xF8-\xFF]+|[A-Z\xC0-\xD6\xD8-\xDE]+(?![a-z\xDF-\xF6\xF8-\xFF])|\d+/g;
        return input.match(regex);
    },

    toCamelCaseUtil: function (inputArray) {
        let result = "";
        for (let i = 0, len = inputArray.length; i < len; i++) {
            let currentStr = inputArray[i];
            let tempStr = currentStr.toLowerCase();
            if (i != 0) {
                // convert first letter to upper case (the word is in lowercase) 
                tempStr = tempStr.substr(0, 1).toUpperCase() + tempStr.substr(1);
            }
            result += tempStr;
        }
        return result;
    }
}