/**
* Convert camel case to under score joined.
* @function lib.string.underscorize
* @param {string} value - String value to convert.
* @returns {string} - Under score joined string.
*/
module.exports = function (value) {
return value && value.replace(/([A-Z])/g, function ($1) {
return "_" + $1.toLowerCase();
})
.replace(/^_/, '');
};