Mirrors/lodash
1
0
Fork 0
mirror of https://github.com/whoisclebs/lodash.git synced 2026-01-31 23:37:49 +00:00
Code Issues Packages Projects Releases Wiki Activity

_.isEqual: Use [[Class]] checking for consistency and performance.

Browse Source 
* Objects with different `[[Class]]` names are no longer equivalent.
* String, number, and boolean primitives and their corresponding wrappers (e.g., `"5"` and `new String("5")`) are now equivalent.
* Arrays are now recursively compared by their numeric properties only. All non-numeric properties are ignored.
This commit is contained in:
Kit Cambridge
2011-10-25 22:45:48 -06:00
parent 29f4478a86
commit a0b3feca85
2 changed files with 64 additions and 56 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
test/objects.js
View File

@@ -94,19 +94,19 @@ $(document).ready(function() {
// String object and primitive comparisons.
ok(_.isEqual("Curly", "Curly"), "Identical string primitives are equal");
ok(_.isEqual(new String("Curly"), new String("Curly")), "String objects with identical primitive values are equal");
ok(_.isEqual(new String("Curly"), "Curly"), "String primitives and their corresponding object wrappers are equal");
ok(_.isEqual("Curly", new String("Curly")), "Commutative equality is implemented for string objects and primitives");
ok(!_.isEqual("Curly", "Larry"), "String primitives with different values are not equal");
ok(!_.isEqual(new String("Curly"), "Curly"), "String primitives and their corresponding object wrappers are not equal");
ok(!_.isEqual("Curly", new String("Curly")), "Commutative equality is implemented for string objects and primitives");
ok(!_.isEqual(new String("Curly"), new String("Larry")), "String objects with different primitive values are not equal");
ok(!_.isEqual(new String("Curly"), {toString: function(){ return "Curly"; }}), "String objects and objects with a custom `toString` method are not equal");
// Number object and primitive comparisons.
ok(_.isEqual(75, 75), "Identical number primitives are equal");
ok(_.isEqual(new Number(75), new Number(75)), "Number objects with identical primitive values are equal");
ok(_.isEqual(75, new Number(75)), "Number primitives and their corresponding object wrappers are equal");
ok(_.isEqual(new Number(75), 75), "Commutative equality is implemented for number objects and primitives");
ok(!_.isEqual(75, new Number(75)), "Number primitives and their corresponding object wrappers are not equal");
ok(!_.isEqual(new Number(75), 75), "Commutative equality is implemented for number objects and primitives");
ok(!_.isEqual(new Number(75), new Number(63)), "Number objects with different primitive values are not equal");
ok(!_.isEqual(new Number(63), {valueOf: function(){ return 63; }}), "Number objects and objects with a `valueOf` method are not equal");
@@ -119,8 +119,8 @@ $(document).ready(function() {
// Boolean object and primitive comparisons.
ok(_.isEqual(true, true), "Identical boolean primitives are equal");
ok(_.isEqual(new Boolean, new Boolean), "Boolean objects with identical primitive values are equal");
ok(!_.isEqual(true, new Boolean(true)), "Boolean primitives and their corresponding object wrappers are not equal");
ok(!_.isEqual(new Boolean(true), true), "Commutative equality is implemented for booleans");
ok(_.isEqual(true, new Boolean(true)), "Boolean primitives and their corresponding object wrappers are equal");
ok(_.isEqual(new Boolean(true), true), "Commutative equality is implemented for booleans");
ok(!_.isEqual(new Boolean(true), new Boolean), "Boolean objects with different primitive values are not equal");
// Common type coercions.
@@ -178,7 +178,7 @@ $(document).ready(function() {
b.join = b.pop = b.reverse = b.shift = b.slice = b.splice = b.concat = b.sort = b.unshift = null;
// Array elements and properties.
ok(!_.isEqual(a, b), "Arrays containing equivalent elements and different non-numeric properties are not equal");
ok(_.isEqual(a, b), "Arrays containing equivalent elements and different non-numeric properties are equal");
a.push("White Rocks");
ok(!_.isEqual(a, b), "Arrays of different lengths are not equal");
a.push("East Boulder");
@@ -240,7 +240,7 @@ $(document).ready(function() {
// Instances.
ok(_.isEqual(new First, new First), "Object instances are equal");
ok(!_.isEqual(new First, new Second), "Objects with different constructors and identical own properties are not equal");
ok(!_.isEqual({value: 1}, new First), "Object instances and objects sharing equivalent properties are not identical");
ok(!_.isEqual({value: 1}, new First), "Object instances and objects sharing equivalent properties are not equal");
ok(!_.isEqual({value: 2}, new Second), "The prototype chain of objects should not be examined");
// Circular Arrays.