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How do I convert between big-endian and little-endian values in C++?
...wap_endian(T u)
{
static_assert (CHAR_BIT == 8, "CHAR_BIT != 8");
union
{
T u;
unsigned char u8[sizeof(T)];
} source, dest;
source.u = u;
for (size_t k = 0; k < sizeof(T); k++)
dest.u8[k] = source.u8[sizeof(T) - k - 1];
return dest.u;
}
us...
Is it possible to solve the “A generic array of T is created for a varargs parameter” compiler warni
...
As you can see in Joseph Darcy's blog post, the Project Coin exercise to select some small incremental language improvements for Java 7 accepted Bob Lee's proposal to allow something like @SuppressWarnings("varargs") at the method side to make this warning go away in situations where it was known ...
PHP prepend associative array with literal keys?
...hat contains the new key-value pair at the beginning of the array with the union operator +. The outcome is an entirely new array though and creating the new array has O(n) complexity.
The syntax is below.
$new_array = array('new_key' => 'value') + $original_array;
Note: Do not use array_merg...
switch / pattern matching idea
...is is less useful with open ended types, but when matching a discriminated union or tuples, it's very nifty. In F#, you expect people to pattern match, and it instantly makes sense.
The "problem" is that once you start using some functional concepts, it's natural to want to continue. However, leve...
What is the Difference Between Mercurial and Git?
...can merge with an unrelated repository by doing:
git fetch <project-to-union-merge>
GIT_INDEX_FILE=.git/tmp-index git-read-tree FETCH_HEAD
GIT_INDEX_FILE=.git/tmp-index git-checkout-cache -a -u
git-update-cache --add -- (GIT_INDEX_FILE=.git/tmp-index git-ls-files)
cp .git/FETCH_HEAD .git/MERG...
Cycles in family tree software
...mes as needed, hinting at the duplication by lighting up all the copies on selecting one of them.
share
edited Mar 6 '14 at 14:47
...
Python - Passing a function into another function
...o be passed to `func`.
Example
-------
>>> def foo(a:Union[float, int], b:Union[float, int]):
... '''The function to pass'''
... print(a+b)
>>> looper(foo, 3, 2, b=4)
6
6
6
"""
for i in range(n):
fn(*args, **kwargs)
...
In what areas might the use of F# be more appropriate than C#? [closed]
...a structures used to represent program code in F# are mostly discriminated unions (which are not supported in C# in any reasonable way) and this makes a huge difference for this kind of application (where you need to process tree structures, such as program code). Discriminated unions and pattern ma...
When do I use a dot, arrow, or double colon to refer to members of a class in C++?
...
Dot operator is used in direct member selection scenarios.
print(a.b)
Here, we are accessing b, which is a direct member of an object a. So, primarily, a is an object and b is a member (function/ variable etc) of a.
Arrow operator is used in indirect membe...
Getting attributes of a class
...dict = {**type(mc).__dict__, **mc.__dict__}
# Or Python < 3.5
def dict_union(d1, d2):
z = d1.copy()
z.update(d2)
return z
combined_dict = dict_union(type(mc).__dict__, mc.__dict__)
attributes = [a for a, v in combined_dict.items()
if not re.match('<function.*?>'...