modified

build/node_modules/listify/index.js

@@ -0,0 +1,37 @@
+'use strict';
+
+var has = Function.call.bind(Object.prototype.hasOwnProperty);
+var join = Function.call.bind(Array.prototype.join);
+var trim = Function.call.bind(String.prototype.trim);
+var isArray = Array.isArray;
+var filter = Function.call.bind(Array.prototype.filter);
+var slice = Function.call.bind(Array.prototype.slice);
+var concat = Function.call.bind(Array.prototype.concat);
+
+module.exports = function listify(list) {
+	if (!isArray(list)) {
+		throw new TypeError('requires an array');
+	}
+
+	var options = arguments.length > 1 ? arguments[1] : null;
+	if (!options) {
+		options = {};
+	}
+	var separator = has(options, 'separator') ? options.separator : ', ';
+	var finalWord = has(options, 'finalWord') ? options.finalWord : 'and';
+	if (finalWord.length > 0) {
+		finalWord += ' ';
+	}
+
+	var trimmed = filter(list, trim);
+	var str;
+	if (trimmed.length === 2 && finalWord.length > 0) {
+		str = join(trimmed, ' ' + finalWord);
+	} else if (trimmed.length < 3) {
+		str = join(trimmed, separator);
+	} else {
+		str = join(concat(slice(trimmed, 0, -1), finalWord + trimmed[trimmed.length - 1]), separator);
+	}
+	return str;
+};
+