test

.gitignore

@@ -10,5 +10,4 @@ plugins/
 webpack.config.dump.js
 tmp/
 *todo*
-test.js
 临时暂存待办.md

test.js

@@ -0,0 +1,27 @@
+
+
+function compose(...fns) {
+  var start = fns.length - 1;
+  return function () {
+    var i = start;
+    var result = fns[start].apply(this, arguments);
+    while (i--) result = fns[i].call(this, result);
+    return result;
+  };
+}
+
+// const _pipe = (f, g) => (...args) => g.call(null, f.apply(null, args))
+// const compose = (...fns) => fns.reverse().reduce(_pipe)
+
+
+// const _pipe = (f, g) => (...args) => g(f(...args))
+// const compose = (...fns) => fns.reverse().reduce(_pipe)
+
+
+// test
+function f1(a, b) { return a + b }
+function f2(a) { return 2 * a }
+function f3(a) { return a * a }
+// let f = compose(f1, f2, f3)
+let f = compose(f3, f2, f1)
+console.log(f(1, 2)) // 36

test1.js

@@ -0,0 +1,27 @@
+
+
+function compose(...fns) {
+  var start = fns.length - 1;
+  return function () {
+    var i = start;
+    var result = fns[start].apply(this, arguments);
+    while (i--) result = fns[i].call(this, result);
+    return result;
+  };
+}
+
+// const _pipe = (f, g) => (...args) => g.call(null, f.apply(null, args))
+// const compose = (...fns) => fns.reverse().reduce(_pipe)
+
+
+// const _pipe = (f, g) => (...args) => g(f(...args))
+// const compose = (...fns) => fns.reverse().reduce(_pipe)
+
+
+// test
+function f1(a, b) { return a + b }
+function f2(a) { return 2 * a }
+function f3(a) { return a * a }
+// let f = compose(f1, f2, f3)
+let f = compose(f3, f2, f1)
+console.log(f(1, 2)) // 36