prfun - npm Package Compare versions

Comparing version 2.1.3 to 2.1.4

.travis.yml

 language: node_js
 node_js:
   - "stable"
+  - "5.0"
+  - "4.4"
   - "4.2"
@@ -5,0 +7,0 @@ - "4.0"

CHANGELOG.md

@@ -0,1 +1,6 @@
+# prfun 2.1.4 (2016-05-05)
+* Add a cache to ensure that only a single `prfun` `Promise` class is
+  constructed even when using the wrapper interface.
+* Update npm dev dependencies.
+
 # prfun 2.1.3 (2015-12-11)
@@ -2,0 +7,0 @@ * Optimize the `Promise` subclass constructor to avoid costly overhead

lib/index.js

 // Utility functions for ES6 Promises.
 
+var FakeMap = function FakeMap() {
+  'use strict';
+  this.entries = [];
+};
+FakeMap.prototype._getEntry = function _getEntry(key) {
+  'use strict';
+  var entries = this.entries;
+  for (var i = 0; i < entries.length; i++) {
+    if (entries[i].key === key) { return entries[i]; }
+  }
+};
+FakeMap.prototype.set = function set(key, value) {
+  'use strict';
+  var entry = this._getEntry(key);
+  if (entry !== void 0) {
+    entry.value = value;
+  } else {
+    this.entries.push({ key: key, value: value });
+  }
+};
+FakeMap.prototype.get = function get(key) {
+  'use strict';
+  var entry = this._getEntry(key);
+  if (entry !== void 0) {
+    return entry.value;
+  }
+};
+
+var makeMap = (function() {
+  'use strict';
+  var m = null;
+  return function() {
+    if (m === null) {
+      m = global.Map ? new global.Map() : new FakeMap();
+    }
+    return m;
+  };
+})();
+
 module.exports = function(ParentPromise, smash) {
@@ -20,2 +59,7 @@ 'use strict';
   }
+  // Use cached PrFun promise if possible.
+  var cache = makeMap();
+  var PrFunPromise = smash ? null : cache.get(ParentPromise);
+  if (PrFunPromise) { return PrFunPromise; }
+
   // Find an implementation of Object.setPrototypeOf
@@ -34,3 +78,3 @@ var setPrototypeOf = Object.setPrototypeOf;
   var makeResolve = null;
-  var PrFunPromise = (function makeSubclass(ParentPromise) {
+  PrFunPromise = (function makeSubclass(ParentPromise) {
     var PrFunPromise;
@@ -780,3 +824,4 @@ // jscs:disable maximumLineLength
 
+  if (!smash) { cache.set(ParentPromise, Promise); }
   return Promise;
 };

package.json

 {
   "name": "prfun",
-  "version": "2.1.3",
+  "version": "2.1.4",
   "description": "Helper functions for ES6 promises",
@@ -31,10 +31,10 @@ "main": "index.js",
   "devDependencies": {
-    "core-js": "~1.2.6",
-    "jscs": "~2.7.0",
-    "jshint": "~2.8.0",
-    "mocha": "~2.3.4"
+    "core-js": "^2.3.0",
+    "jscs": "^2.11.0",
+    "jshint": "^2.9.2",
+    "mocha": "^2.4.5"
   },
   "optionalDependencies": {
-    "core-js": "~1.2.6"
+    "core-js": "^2.3.0"
   }
 }

README.md

@@ -14,3 +14,3 @@ # prfun
 implementation from [core-js], if there is not already a `Promise`
-implemention present.  The `prfun` package also requires an
+implementation present.  The `prfun` package also requires an
 implementation of `Object.setPrototypeOf`; it will attempt to
@@ -36,7 +36,9 @@ load this from [core-js] if not already present.   Implementations
 var Promise = require('prfun/wrap')( SomeOtherPromise );
+// Note that the same `Promise` object will always be
+// returned if given the same `SomeOtherPromise` to wrap.
 ```
 Note that the `SomeOtherPromise` implementation must support `Promise`
-subclassing using ES6 semantics.  (The implementations in [es6-shim]
-and [core-js] are known to do so.)  We will call the subclass created
-by `prfun` a "`prfun` `Promise`".
+subclassing using ES6 semantics.  (The implementations in [babybird],
+[es6-shim], and [core-js] are known to do so.)  We will call the subclass
+created by `prfun` a "`prfun` `Promise`".
 
@@ -744,3 +746,3 @@ According to the ES6 `Promise` spec, all `Promise` methods (including
 This is identical to `Promise#then` except that it does not return
-a value.  Some `Promise` implementations (for example, `babybird`)
+a value.  Some `Promise` implementations (for example, [babybird])
 export a `then0` implementation which is substantially faster than
@@ -1487,2 +1489,3 @@ calling `Promise#then`.  If such an implementation is present, its
 [core-js]:  https://github.com/zloirock/core-js
+[babybird]: https://github.com/cscott/babybird
 
@@ -1489,0 +1492,0 @@ [NPM1]: https://nodei.co/npm/prfun.png

No alert changes

Improved metrics

Total package byte prevSize

206855

0.71%

Lines of code

4763

0.89%

Number of lines in readme file

1497

0.2%

No dependency changes