Compare object instances for equality by their attributes
I have a class MyClass, which contains two member variables foo and bar: class MyClass: def __init__(self, foo, bar): self.foo = foo self.bar … Read more
equality
How do you test to see if a double is equal to NaN?
I have a double in Java and I want to check if it is NaN. What is the best way to do this? … Read more
Elegant ways to support equivalence (“equality”) in Python classes
When writing custom classes it is often important to allow equivalence by means of the == and != operators. In Python, this is … Read more
What’s the difference between equal?, eql?, ===, and ==?
I am trying to understand the difference between these four methods. I know by default that == calls the method equal? which returns … Read more
String comparison in Python: is vs. == [duplicate]
This question already has answers here: Why does comparing strings using either ‘==’ or ‘is’ sometimes produce a different result? (15 answers) Closed … Read more
Is there a difference between “==” and “is”?
This question’s answers are a community effort. Edit existing answers to improve this post. It is not currently accepting new answers or interactions. … Read more
How do I compare strings in Java?
This question’s answers are a community effort. Edit existing answers to improve this post. It is not currently accepting new answers or interactions. … Read more
What is the difference between == and equals() in Java?
I wanted to clarify if I understand this correctly: == is a reference comparison, i.e. both objects point to the same memory location … Read more
How do I check for null values in JavaScript?
How can I check for null values in JavaScript? I wrote the code below but it didn’t work. if (pass == null || … Read more
Why does comparing strings using either ‘==’ or ‘is’ sometimes produce a different result?
Two string variables are set to the same value. s1 == s2 always returns True, but s1 is s2 sometimes returns False. If … Read more