Refactoring day1

node_modules/is-stream/index.js

@@ -1,29 +1,21 @@
 'use strict';
 
-const isStream = stream =>
-	stream !== null &&
-	typeof stream === 'object' &&
-	typeof stream.pipe === 'function';
+var isStream = module.exports = function (stream) {
+	return stream !== null && typeof stream === 'object' && typeof stream.pipe === 'function';
+};
 
-isStream.writable = stream =>
-	isStream(stream) &&
-	stream.writable !== false &&
-	typeof stream._write === 'function' &&
-	typeof stream._writableState === 'object';
+isStream.writable = function (stream) {
+	return isStream(stream) && stream.writable !== false && typeof stream._write === 'function' && typeof stream._writableState === 'object';
+};
 
-isStream.readable = stream =>
-	isStream(stream) &&
-	stream.readable !== false &&
-	typeof stream._read === 'function' &&
-	typeof stream._readableState === 'object';
+isStream.readable = function (stream) {
+	return isStream(stream) && stream.readable !== false && typeof stream._read === 'function' && typeof stream._readableState === 'object';
+};
 
-isStream.duplex = stream =>
-	isStream.writable(stream) &&
-	isStream.readable(stream);
+isStream.duplex = function (stream) {
+	return isStream.writable(stream) && isStream.readable(stream);
+};
 
-isStream.transform = stream =>
-	isStream.duplex(stream) &&
-	typeof stream._transform === 'function' &&
-	typeof stream._transformState === 'object';
-
-module.exports = isStream;
+isStream.transform = function (stream) {
+	return isStream.duplex(stream) && typeof stream._transform === 'function' && typeof stream._transformState === 'object';
+};