equality

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Comparing two sets for equality recursively?

I am pretty new to programming in general and am trying to construct a function that will take as input two sets, which can contain other sets (a (b c) d e (f g (h)), 开发者_开发知识库(a b c (d e f))[详细]

2023-03-06 13:23 分类：问答
java: comparing classes with == or .equals(): is there a difference? [duplicate]

This question already has answers here: Closed 11 years ago. Possible Duplicate: Does Java guarantee that开发者_运维百科 Object.getClass() == Object.getClass()?[详细]

2023-03-06 06:51 分类：问答
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 || cpass == null || email == null || cemail == null || user == null) {[详细]

2023-03-05 18:03 分类：问答
In SML, how to assert that a particular exception is thrown?

Without taking the effort to actually clone JUnit or something, I\'m throwing together a few utility functions to help test some SML code.I do know about QCheck, but it can\'t do this one thing either[详细]

2023-03-05 08:22 分类：问答
In Scala, is there a neat and simple way to compare one value with multiple values

Say I have a variable x, and I want to check if it\'s equal toany one of multiple values a, b, c, d, e (I mean the == equality, not identity).[详细]

2023-03-04 07:31 分类：问答
How to check class equality in Python 2.5?

I\'ve looked through Python 2.5 documentation and I couldn\'t find an answer to this: How do I check if an object is the same class 开发者_高级运维as another object?[详细]

2023-03-01 09:36 分类：问答
C++ equality in std::tr1::unordered_map

Is there a reason that std::tr1::unordered_map left out the equality (==) operator, which exists for std::map ?[详细]

2023-02-26 21:00 分类：问答
NSSet -member to check equality of NSValue

I have a NSSet containing many thousands of NSValue objects (wrapping CGPoints). I would like to very quickly find if a given CGPoint value exists in the NSSet. It seems to me that the member: method[详细]

2023-02-26 19:07 分类：问答
Java equivalent of .NET object.Equals(object, object)

In .NET System.Object defines a static method bool Equals(object a, object b); That is a useful alternative to a.Equals(b) in cases where a may be null.It also returns true if both a and b are null[详细]

2023-02-23 00:15 分类：问答
comparing 2 objects

I was wondering how you compare two objects for different values. What do i need to research to accomplish this? Is it a comparator and if so could someone point me to a good tutorial?[详细]

2023-02-22 12:26 分类：问答