Improve examples

Author: tshemsedinov

JavaScript/1-wrap.js

@@ -19,5 +19,5 @@ const func = (par1, par2) => {
   return [par1, par2];
 };
 
-const cloned = wrap(func);
-cloned('Uno', 'Due');
+const wrapped = wrap(func);
+wrapped('Uno', 'Due');

JavaScript/2-before-after.js

@@ -21,5 +21,11 @@ const after = (...args) => {
   return args;
 };
 
-const cloned = wrap(before, after, func);
-cloned('Uno', 'Due');
+const wrapped = wrap(before, after, func);
+wrapped('Uno', 'Due');
+
+console.dir({
+  func: func.length,
+  wrapped: wrapped.length
+});
+

JavaScript/7-once.js

@@ -2,14 +2,11 @@
 
 // Wrapper will prevent calls > n
 
-const once = (fn) => {
-  let finished = false;
-  return (...args) => {
-    if (finished) return;
-    const res = fn(...args);
-    finished = true;
-    return res;
-  };
+const once = fn => (...args) => {
+  if (!fn) return;
+  const res = fn(...args);
+  fn = null;
+  return res;
 };
 
 // Usage

JavaScript/8-limit.js

@@ -6,9 +6,8 @@ const limit = (count, fn) => {
   let counter = 0;
   return (...args) => {
     if (counter === count) return;
-    const res = fn(...args);
     counter++;
-    return res;
+    return fn(...args);
   };
 };
 

JavaScript/9-cancelable.js

@@ -4,10 +4,7 @@ const cancelable = (fn) => {
   const wrapper = (...args) => {
     if (fn) return fn(...args);
   };
-  wrapper.cancel = () => {
-    fn = null;
-    return wrapper;
-  };
+  wrapper.cancel = () => fn = null;
   return wrapper;
 };
 
@@ -18,7 +15,7 @@ const fn = (par) => {
 };
 
 const f = cancelable(fn);
-f('first');
 
+f('first');
 f.cancel();
 f('second');