Merges an array recursively and join it as a string with the specified glue character

stringify.js

var stringify = function(arr, glue) {
	if (glue == undefined) glue = ',';
	var seq = [];
	var merge_recursive = function(a) {
		// Using BFS algorithm as if it was a tree
		for (var i = 0; i < a.length;  i++) {
			if (Array.isArray(a[i])) {
				merge_recursive(a[i]);
			} else {
				seq.push(a[i]);
			}
		}
		return seq;
	}
	return merge_recursive(arr).join(glue);
}

console.info(stringify(["hola", ["soy", ["juan", "fernandez"] ], "y", ["no", "tengo", ["dinero"] ] ]));