equality Archives - Page 2 of 3

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 ...

May 16, 2022
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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? ...

May 16, 2022
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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 ...

May 3, 2022
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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 ...

April 30, 2022
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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 ...

April 30, 2022
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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. ...

April 29, 2022
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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. ...

April 26, 2022
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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 ...

April 26, 2022
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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 || ...

April 22, 2022
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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 ...

April 13, 2022
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