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How to declare constant map
...t = 1
Second = 2
Third = 4
)
You can not create constants of maps, arrays and it is written in effective go:
Constants in Go are just that—constant. They are created at compile
time, even when defined as locals in functions, and can only be
numbers, characters (runes), strings or b...
Beyond Stack Sampling: C++ Profilers
...-row, cell-by-cell. It turns out if you build the row all at once, from an array of values, it's a lot faster.
P.S. If you're multi-threaded, when you pause it, all threads pause. Take a look at the call stack of each thread. Chances are, only one of them is the real culprit, and the others are id...
How to unit test an object with database queries
...mockRepository.CreateMockOfType(FooDataProvider);
// create a new array of Foo objects
testFooArray = new Foo[] {Foo.new(), Foo.new(), Foo.new()}
// the next statement will cause testFooArray to be returned every time we call FooDAtaProvider.GetAllFoos,
// instead o...
What is the difference between JavaScript and ECMAScript?
...Language Specification defines all logic for creating and editing objects, arrays, numbers, etc...
DOM (Document Object Model) makes it possible to communicate with HTML/XML documents (e.g. document.getElementById('id');).
BOM (Browser Object Model) is the hierarchy of browser objects (e.g. location...
Why do some claim that Java's implementation of generics is bad?
...aints of Java/it's generics. Enums have a static values() method giving an array of their elements typed as the enum, not Enum, and that type is determined by the generic parameter, meaning you want Enum<T>. Of course, that typing only makes sense in the context of an enumerated type, and all ...
MIN and MAX in C
...tic types (integers, floats, pointers etc) will be used and not structs or arrays etc.
If all types are correct, the GENERIC_MAX macro will be called. Extra parenthesis are needed around each macro parameter, as the usual standard precaution when writing C macros.
Then there's the usual problems w...
How do PHP sessions work? (not “how are they used?”)
...is un-serialized when the file is loaded by PHP, to populate the $_SESSION array.
Sometimes, the session id is not stored in a cookie, but sent in URLs, too -- but that's quite rare, nowadays.
For more informations, you can take a look at the Session Handling section of the manual, that gives so...
When to use single quotes, double quotes, and backticks in MySQL
...it has been validated against a list of acceptable table names - create an array of permissible names and check the variable matches something in the list to make it safe to use. Otherwise you cannot safely escape a table name variable for use.
– Michael Berkowski
...
What are the special dollar sign shell variables?
...
$1, $2, $3, ... are the positional parameters.
"$@" is an array-like construct of all positional parameters, {$1, $2, $3 ...}.
"$*" is the IFS expansion of all positional parameters, $1 $2 $3 ....
$# is the number of positional parameters.
$- current options set for the shell.
$$ pi...
How do you tell someone they're writing bad code? [closed]
...plain why a function is better than cutting & pasting.
Explain why an array is better than $foo1, $foo2, $foo3.
Explain why global variables are dangerous, and that local variables will make life easier.
Simply whipping out a coding standard and saying "do this" is worthless because it doesn'...