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Why #define TRUE (1==1) in a C boolean macro instead of simply as 1?
... there's no practical difference as far as the compiler is concerned. But by letting the compiler define TRUE and FALSE according to its own rules, you're making their meanings explicit to programmers, and you're guaranteeing consistency within your program and any other library (assuming the other...
Mixin vs inheritance
... places than where it is used, so it is good to mitigate that disadvantage by keeping it close by.
I have personally found a mix-in necessary to use over single inheritance where we are unittesting a lot of similar code, but the test-cases are instantiated based on their inheritance of a base case...
Why all the Active Record hate? [closed]
... ways, so before anyone says "ActiveRecord Sucks" it needs to be qualified by saying "which ActiveRecord, there's heaps?"
I'm only familiar with Rails' ActiveRecord, I'll try address all the complaints which have been raised in context of using it.
@BlaM
The problem that I see with Active ...
Is Python interpreted, or compiled, or both?
...n is compiled. Not compiled to machine code ahead of time (i.e. "compiled" by the restricted and wrong, but alas common definition), "only" compiled to bytecode, but it's still compilation with at least some of the benefits. For example, the statement a = b.c() is compiled to a byte stream which, wh...
Explanation of …
... implement templating functionality (like in PHP) but on the client side.
By setting the type to "text/template", it's not a script that the browser can understand, and so the browser will simply ignore it. This allows you to put anything in there, which can then be extracted later and used by a te...
Difference between a Seq and a List in Scala
...oming defender methods. Scala's List is an abstract class that is extended by Nil and ::, which are the concrete implementations of List.
So, where Java's List is an interface, Scala's List is an implementation.
Beyond that, Scala's List is immutable, which is not the case of LinkedList. In fact, ...
When are you supposed to use escape instead of encodeURI / encodeURIComponent?
...," / ";" / "="
A percent sign is only allowed if it is directly followed by two hexdigits, percent followed by u is not allowed.
encodeURI()
Use encodeURI when you want a working URL. Make this call:
encodeURI("http://www.example.org/a file with spaces.html")
to get:
http://www.example.org/a...
View markdown files offline [closed]
...l lines in the code block on a single line. So I tried Markview mentioned by swcool. The style doesn't completely match github, but it at least puts each line in the code block on separate lines.
– E L Rayle
Jun 28 '15 at 14:09
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Fatal error: use of unimplemented initializer 'init(coder:)' for class
...
Issue
This is caused by the absence of the initializer init?(coder aDecoder: NSCoder) on the target UIViewController. That method is required because instantiating a UIViewController from a UIStoryboard calls it.
To see how we initialize a UIView...
How do you increase the max number of concurrent connections in Apache?
... an apache is started, it will start 2 child processes which is determined by StartServers parameter. Then each process will start 25 threads determined by ThreadsPerChild parameter so this means 2 process can service only 50 concurrent connections/clients i.e. 25x2=50. Now if more concurrent users ...