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On design patterns: When should I use the singleton?
...e locators and client side UI's also being possibly "acceptable" choices.
Read more at Singleton I love you, but you're bringing me down.
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Declare a const array
...
Yes, but you need to declare it readonly instead of const:
public static readonly string[] Titles = { "German", "Spanish", "Corrects", "Wrongs" };
The reason is that const can only be applied to a field whose value is known at compile-time. The array ini...
Secure hash and salt for PHP passwords
...shing & checking method.
The theory of the answer is still a good read though.
TL;DR
Don'ts
Don't limit what characters users can enter for passwords. Only idiots do this.
Don't limit the length of a password. If your users want a sentence with supercalifragilisticexpialidocious in it,...
Why is Multiple Inheritance not allowed in Java or C#?
...languages while providing too little benefit.
For a more fun and in-depth read, there are some articles available on the web with interviews of some of the language designers. For example, for .NET, Chris Brumme (who worked at MS on the CLR) has explained the reasons why they decided not to:
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Resolve promises one after another (i.e. in sequence)?
Consider the following code that reads an array of files in a serial/sequential manner. readFiles returns a promise, which is resolved only once all files have been read in sequence.
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not None test in Python [duplicate]
... not (val is None):
# ...
this is simply part of the Zen of Python: "Readability counts." Good Python is often close to good pseudocode.
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What is the difference between HTTP and REST?
After reading a lot about the differences between REST and SOAP, I got the impression that REST is just another word for HTTP. Can someone explain what functionality REST adds to HTTP?
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How to prevent SIGPIPEs (or handle them properly)
...all server program that accepts connections on a TCP or local UNIX socket, reads a simple command and, depending on the command, sends a reply. The problem is that the client may have no interest in the answer sometimes and exits early, so writing to that socket will cause a SIGPIPE and make my serv...
How to rsync only a specific list of files?
... this option allows you to specify the exact list of files to transfer (as read from the specified FILE or - for standard input). It also tweaks the default behavior of rsync to make transferring just the specified files and directories easier:
The --relative (-R) option is implied, which p...
Is there a command line utility for rendering GitHub flavored Markdown?
...rote a small CLI in Python and added GFM support. It's called Grip (Github Readme Instant Preview).
Install it with:
$ pip install grip
And to use it, simply:
$ grip
Then visit localhost:5000 to view the readme.md file at that location.
You can also specify your own file:
$ grip CHANGES.md
...