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How to make a variadic macro (variable number of arguments)
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C99 way, also supported by VC++ compiler.
#define FOO(fmt, ...) printf(fmt, ##__VA_ARGS__)
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Is there a benefit to defining a class inside another class in Python?
...that you can accomplish exactly the same (perhaps in a less confusing way) by using a module.
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namespaces for enum types - best practices
...d Principle: Class should be closed for modifying, but open for extending. By extending I mean not adding to the existing code, but wrapping over it with the new code (eg. deriving).
– SasQ
Dec 12 '12 at 2:31
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How to create a self-signed certificate with OpenSSL
...previously. If you need more security, you should use a certificate signed by a certificate authority (CA).
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How do I add a library project to Android Studio?
...has changed.
My description is focused on adding external library project by hand via Gradle files (for better understanding the process). If you want to add a library via Android Studio creator just check the answer below with visual guide (there are some differences between Android Studio 1.0 and...
How to detect if a variable is an array
...oundaries as each frame has its own Array object. You can work around this by checking the internal [[Class]] property of the object. To get it, use Object.prototype.toString() (this is guaranteed to work by ECMA-262):
Object.prototype.toString.call(obj) === '[object Array]'
Both methods will onl...
github: No supported authentication methods available
...sion is probably accessed through plink and your keys are probably managed by Pageant.
Import the key you need each time you load Pageant. If you followed guides that said "import your key", and saw that it worked, but it doesn't work now, see Chapter 9: Using Pageant for authentication.
One last t...
What is this: [Ljava.lang.Object;?
... an array type then the binary name of the class is returned, as specified by the Java Language Specification (§13.1).
If this class object represents a primitive type or void, then the name returned is the Java language keyword corresponding to the primitive type or void.
If this class ...
CHECK constraint in MySQL is not working
...e MySQL Reference Manual says:
The CHECK clause is parsed but ignored by all storage engines.
Try a trigger...
mysql> delimiter //
mysql> CREATE TRIGGER trig_sd_check BEFORE INSERT ON Customer
-> FOR EACH ROW
-> BEGIN
-> IF NEW.SD<0 THEN
-> SET NEW.SD...
HTTP headers in Websockets client API
...WebSockets API, but it seems they are just developing the API on an island by itself.
– eleotlecram
May 1 '12 at 14:26
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