to-function - npm Package Compare versions

Comparing version 1.0.0 to 1.1.0

component.json

@@ -5,4 +5,4 @@ {
   "description": "Convert property access strings into functions",
-  "version": "1.0.0",
-  "keywords": ["utility"],
+  "version": "1.1.0",
+  "keywords": ["utility", "function"],
   "dependencies": {},
@@ -9,0 +9,0 @@ "development": {},

History.md

 
+1.1.0 / 2012-11-20 
+==================
+
+  * add js expression support
+  * add strict equality default
+  * add regexp support
+
 1.0.0 / 2012-11-08 
@@ -3,0 +10,0 @@ ==================

index.js

@@ -11,4 +11,2 @@
  *
- * TODO: consider compiling to functions.
- *
  * @param {Mixed} obj
@@ -20,9 +18,11 @@ * @return {Function}
 function toFunction(obj) {
-  switch (typeof obj) {
-    case 'function':
+  switch ({}.toString.call(obj)) {
+    case '[object Function]':
       return obj;
-    case 'string':
+    case '[object String]':
       return stringToFunction(obj);
+    case '[object RegExp]':
+      return regexpToFunction(obj);
     default:
-      throw new TypeError('invalid callback "' + obj + '"');
+      return defaultToFunction(obj);
   }
@@ -32,2 +32,30 @@ }
 /**
+ * Default to strict equality.
+ *
+ * @param {Mixed} val
+ * @return {Function}
+ * @api private
+ */
+
+function defaultToFunction(val) {
+  return function(obj){
+    return val === obj;
+  }
+}
+
+/**
+ * Convert `re` to a function.
+ *
+ * @param {RegExp} re
+ * @return {Function}
+ * @api private
+ */
+
+function regexpToFunction(re) {
+  return function(obj){
+    return re.test(obj);
+  }
+}
+
+/**
  * Convert property `str` to a function.
@@ -41,15 +69,3 @@ *
 function stringToFunction(str) {
-  var props = str.split('.');
-  return function(obj){
-    for (var i = 0; i < props.length; ++i) {
-      if (null == obj) return;
-      var name = props[i];
-      if ('function' == typeof obj[name]) {
-        obj = obj[name]();
-      } else {
-        obj = obj[name];
-      }
-    }
-    return obj;
-  }
+  return new Function('_', 'return _.' + str);
 }

package.json

@@ -5,3 +5,3 @@ {
   "description": "Convert property access strings into functions",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "keywords": ["utility"],
@@ -8,0 +8,0 @@ "dependencies": {},

Readme.md

@@ -1,2 +0,1 @@
-
 # to-function
@@ -20,4 +19,11 @@
 
-# License
+## Converts
 
+  - strings to expressions, for ex `foo.bar()` becomes `return _.foo.bar()`
+  - regexps to `re.test(val)` calls
+  - functions to themselves
+  - defaults to `===` equality
+
+## License
+
   MIT

test/index.js

@@ -16,13 +16,14 @@
 
-  it('should ignore undefined properties', function(){
-    var fn = toFunction('name.first');
-    assert(null == fn({}));
-  })
-
   it('should invoke getter-style functions', function(){
     var user = { attrs: { name: 'tj' }};
     user.name = function(){ return this.attrs.name };
-    var fn = toFunction('name');
+    var fn = toFunction('name()');
     assert('tj' == fn(user));
   })
+
+  it('should support js expressions', function(){
+    var fn = toFunction('age > 18');
+    assert(true === fn({ age: 20 }));
+    assert(false === fn({ age: 18 }));
+  })
 })
@@ -35,2 +36,20 @@
   })
+})
+
+describe('toFunction(regexp)', function(){
+  it('should .test the value', function(){
+    var fn = toFunction(/^tob/);
+    assert(false === fn({}));
+    assert(false === fn('luna'));
+    assert(true === fn('tobi'));
+  })
+})
+
+describe('toFunction(other)', function(){
+  it('should default to === equality', function(){
+    var fn = toFunction(null);
+    assert(true == fn(null));
+    assert(false == fn(0));
+    assert(false == fn());
+  })
 })

No alert changes

Improved metrics

Total package byte prevSize

4018

increased by31.48%

Lines of code

111

increased by35.37%

Number of lines in readme file

29

increased by26.09%

No dependency changes