This is what the equals method does: public boolean equals(Object obj) { if (obj instanceof Integer) { return value == ((Integer)obj).intValue(); } return false; } As you can see, there’s no hash code calculation, but there are a few other operations taking place there. Although x.intValue() == y.intValue() might be slightly faster, you’re getting into … Read more
Simple ES6 approach: const shallowCompare = (obj1, obj2) => Object.keys(obj1).length === Object.keys(obj2).length && Object.keys(obj1).every(key => obj1[key] === obj2[key]); Here I added the object keys amount equality checking for the following comparison should fail (an important case that usually does not taken into the account): shallowCompare({ x: 1, y: 3}, { x: 1, y: 3, a: … Read more
In Expression Language you can just use the == or eq operator to compare object values. Behind the scenes they will actually use the Object#equals(). This way is done so, because until with the current EL 2.1 version you cannot invoke methods with other signatures than standard getter (and setter) methods (in the upcoming EL … Read more
Python (like Java, C, C++, .NET) uses string pooling / interning. The interpreter realises that “hello” is the same as “hello”, so it optimizes and uses the same location in memory. Another goodie: “hell” + “o” is “hello” ==> True
I was looking for the same thing and found an existing way to do so without any custom code or matchers. Use toEqual().
In general, the answer to your question is “yes”, but… .equals(…) will only compare what it is written to compare, no more, no less. If a class does not override the equals method, then it defaults to the equals(Object o) method of the closest parent class that has overridden this method. If no parent classes … Read more
Unfortunately there is no perfect way, unless you use _proto_ recursively and access all non-enumerable properties, but this works in Firefox only. So the best I can do is to guess usage scenarios. 1) Fast and limited. Works when you have simple JSON-style objects without methods and DOM nodes inside: JSON.stringify(obj1) === JSON.stringify(obj2) The ORDER … Read more