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What issues should be considered when overriding equals and hashCode in Java?
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The theory (for the language lawyers and the mathematically inclined):
equals() (javadoc) must define an equivalence relation (it must be reflexive, symmetric, and transitive). In addition, it must be consistent (if the objects are n...
How to avoid long nesting of asynchronous functions in Node.js
I want to make a page that displays some data from a DB, so I have created some functions that get that data from my DB. I'm just a newbie in Node.js, so as far as I understand, if I want to use all of them in a single page (HTTP response) I'd have to nest them all:
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How to do SELECT COUNT(*) GROUP BY and ORDER BY in Django?
... using a transaction model to keep track all the events going through the system
2 Answers
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Why can I initialize a List like an array in C#?
Today I was surprised to find that in C# I can do:
6 Answers
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How many constructor arguments is too many?
Let's say you have a class called Customer, which contains the following fields:
15 Answers
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How does RewriteBase work in .htaccess
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In my own words, after reading the docs and experimenting:
You can use RewriteBase to provide a base for your rewrites. Consider this
# invoke rewrite engine
RewriteEngine On
RewriteBase /~new/
# add trailing slash if ...
How to return result of a SELECT inside a function in PostgreSQL?
...nction in PostgreSQL, but I don't know how to return the result of the query:
2 Answers
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Check if an apt-get package is installed and then install it if it's not on Linux
I'm working on a Ubuntu system and currently this is what I'm doing:
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Return array in a function
I have an array int arr[5] that is passed to a function fillarr(int arr[]) :
19 Answers
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What's the purpose of git-mv?
From what I understand, Git doesn't really need to track file rename/move/copy operations, so what's the real purpose
of git mv ? The man page isn't specially descriptive...
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