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What is the difference between an int and an Integer in Java and C#?
I was reading More Joel on Software when I came across Joel Spolsky saying something about a particular type of programmer knowing the difference between an int and an Integer in Java/C# (Object-Oriented Programming Languages).
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How to check a string for specific characters?
How can I check if a string has several specific characters in it using Python 2?
5 Answers
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PHP global in functions
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Globals are evil
This is true for the global keyword as well as everything else that reaches from a local scope to the global scope (statics, singletons, registries, constants). You do not want to use them. A function call should not have to rely on anything outside, e.g.
function fn()
{
gl...
Naming convention - underscore in C++ and C# variables
It's common to see a _var variable name in a class field. What does the underscore mean? Is there a reference for all these special naming conventions?
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what is faster: in_array or isset? [closed]
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The answers so far are spot-on. Using isset in this case is faster because
It uses an O(1) hash search on the key whereas in_array must check every value until it finds a match.
Being an opcode, it has less overhead than calling the in_array built-in functi...
Why is String immutable in Java?
I was asked in an interview why String is immutable
12 Answers
12
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Why does C++ not have reflection?
...e language design decision and to identify the possibilities of reflection in C++.
14 Answers
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What is the advantage to using bloom filters?
I am reading up on bloom filters and they just seem silly. Anything you can accomplish with a bloom filter, you could accomplish in less space, more efficiently, using a single hash function rather than multiple, or that's what it seems. Why would you use a bloom filter and how is it useful?
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How can I use pointers in Java?
I know Java doesn't have pointers, but I heard that Java programs can be created with pointers and that this can be done by the few who are experts in java. Is it true?
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Purpose of Unions in C and C++
...eople miss it quite often.
The purpose of union is to save memory by using the same memory region for storing different objects at different times. That's it.
It is like a room in a hotel. Different people live in it for non-overlapping periods of time. These people never meet, and generally do...