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Is 'switch' faster than 'if'?
...table is memory address that holds pointer to the labels in something like array structure. following example will help you understand how jump tables are laid out
00B14538 D8 09 AB 00 D8 09 AB 00 D8 09 AB 00 D8 09 AB 00 Ø.«.Ø.«.Ø.«.Ø.«.
00B14548 D8 09 AB 00 D8 09 AB 00 D8 09 AB 00 00 00...
What is the usefulness of PUT and DELETE HTTP request methods?
... and you'll find it straight away.
Building an API without the whole HTTP array of methods makes it easier to be consumed and maintained afterwards
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PHP Function Comments
...data type can be any of PHP's data types
* (int, float, bool, string, array, object, resource, mixed)
* and should contain the type primarily returned. For example, if
* a method returns an object when things work correctly but false
* when an error happens, say 'object' rather ...
How exactly does __attribute__((constructor)) work?
....
The following snippet adds new function pointers to the .ctors function array, principally the same way as __attribute__((constructor)) does (method can coexist with __attribute__((constructor))).
#define SECTION( S ) __attribute__ ((section ( S )))
void test(void) {
printf("Hello\n");
}
void...
When would anyone use a union? Is it a remnant from the C-only days?
...llocated (perhaps they are in-place constructed in a map, or members of an array).
And now, an example, with a UML class diagram:
The situation in plain English: an object of class A can have objects of any class among B1, ..., Bn, and at most one of each type, with n being a pretty big number,...
The new keyword “auto”; When should it be used to declare a variable type? [duplicate]
...ity here
for(auto it = std::begin(v); it != std::end(v); ++it)//v could be array as well
{
//..
}
But when the type is not very well-known and infrequently used , then I think auto seems to reduce readability, such as here:
//bad : auto decreases readability here
auto obj = ProcessData(s...
How do I use reflection to call a generic method?
...the method name as a string in Type.GetMethod and arguments as the objects array in MethodInfo.Invoke.
Below is a simple example that illustrates how some errors can be caught at compile time (commented code) and other at runtime. It also shows how the DLR tries to resolve which method to call.
in...
Using StringWriter for XML Serialization
...s sense. If you want to store data in a different encoding, you use a byte array instead.
SQL Server works on a similar principle; any string passed into an xml column must be encoded as UTF-16. SQL Server will reject any string where the XML declaration does not specify UTF-16. If the XML declarat...
How to change the CHARACTER SET (and COLLATION) throughout a database?
... separately.
I simply used a Perl script to return all these alters as an array and iterated over them, fixed the columns that were too long (generally they were varchar(256) when the data generally only had 20 characters in them so that was an easy fix).
I found some data was corrupted when alter...
Difference between Python's Generators and Iterators
...uples, lists, dictionaries, sets, frozen sets, strings, byte strings, byte arrays, ranges and memoryviews:
>>> all(isinstance(element, collections.Iterable) for element in (
(), [], {}, set(), frozenset(), '', b'', bytearray(), range(0), memoryview(b'')))
True
Iterators require a...