valentine - npm Package Compare versions

Comparing version 1.5.6 to 1.6.0

package.json

 {
     "name": "valentine"
   , "description": "JavaScripts Functional Sister. Utilitiy, Iterators, type checking"
-  , "version": "1.5.6"
+  , "version": "1.6.0"
   , "homepage": "https://github.com/ded/valentine"
@@ -6,0 +6,0 @@ , "author": "Dustin Diaz <[e-mail]> (http://dustindiaz.com)"

src/valentine.js

@@ -235,2 +235,12 @@ (function (name, context, definition) {
 
+  , memo: function (fn, hasher) {
+      var store = {}
+      hasher || (hasher = function (v) {
+        return v
+      })
+      return function () {
+        var key = hasher.apply(this, arguments)
+        return hasOwn.call(store, key) ? store[key] : (store[key] = fn.apply(this, arguments))
+      }
+    }
   }
@@ -237,0 +247,0 @@

tests/tests.js

@@ -217,2 +217,20 @@ if (typeof module !== 'undefined' && module.exports) {
 
+  test('memoize', function (done) {
+    var called = 0
+    var add = v.memo(function (a, b) {
+      ok(++called == 1, 'only calls memoized method once')
+      return a + b
+    })
+    assert.isFunction(add)
+    var computed = add(1, 2)
+    var expected = 3
+    assert.equal(computed, expected, 'should be called once')
+    var secondCall = add(1, 2)
+
+    assert.notEqual(secondCall, 15, 'second call is not equal to 15')
+    assert.equal(secondCall, expected, 'second call should still be cached value')
+
+    done()
+  })
+
   test('first', 1, function () {
@@ -219,0 +237,0 @@ ok(v.first(['a', 'b', 'c']) == 'a', 'a is first');

valentine.js

@@ -242,2 +242,12 @@ /*!
 
+  , memo: function (fn, hasher) {
+      var store = {}
+      hasher || (hasher = function (v) {
+        return v
+      })
+      return function () {
+        var key = hasher.apply(this, arguments)
+        return hasOwn.call(store, key) ? store[key] : (store[key] = fn.apply(this, arguments))
+      }
+    }
   }
@@ -244,0 +254,0 @@

valentine.min.js

@@ -7,2 +7,2 @@ /*!
   */
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No alert changes

Improved metrics

Total package byte prevSize

57631

increased by2.3%

Lines of code

1585

increased by2.26%

No dependency changes