JavaScript function to convert a given string into an array of words.

/**
 * Converts a given string into an array of words.
 *
 * Use String.prototype.split() with a supplied pattern (defaults to non-alpha
 * as a regexp) to convert to an array of strings. Use Array.prototype.filter()
 * to remove any empty strings. Omit the second argument to use the default
 * regexp.
 *
 * @param {string} str
 * @param {RegExp} pattern
 * @return {array}
 */
const words = (str, pattern = /[^a-zA-Z-]+/) =>
    str.split(pattern).filter(Boolean);

//
// Example Usage:

words("I love javaScript!!"); // ["I", "love", "javaScript"]
words("python, javaScript & coffee"); // ["python", "javaScript", "coffee"]