大约有 40,000 项符合查询结果（耗时：0.0631秒） [XML]
Are there benefits of passing by pointer over passing by reference in C++?
...fy the parameter and the value is easy to copy (ints, doubles, char, bool, etc... simple types. std::string, std::vector, and all other STL containers are NOT simple types.)
Pass by const pointer when the value is expensive to copy AND the function does not want to modify the value pointed to AND ...
What is Func, how and when is it used
... use exactly as you would use sqr:
f1(2);
Console.WriteLine(f2(f1(4)));
etc.
Remember though, that it's a delegate, for more advanced info refer to documentation.
share
|
improve this answer
...
How do you iterate through every file/directory recursively in standard C++?
...Is there any way to make it work with Cyrilic characters like - б, в, г etc ?
– unresolved_external
Aug 1 '12 at 19:29
...
Converting NSString to NSDate (and back again)
...ng "10" for representing a year is not good, because it can be 1910, 1810, etc. You probably should use 4 digits for that.
If you can change the date to something like
yyyymmdd
Then you can use:
// Convert string to date object
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[date...
jQuery event to trigger action when a div is made visible
...e "extension" for all methods that reveal the element: show(), slideDown() etc. Something more universal is required to solve this problem for once and all, since its impossible to have "ready" event for delegate() or live().
– Shahriyar Imanov
Feb 24 '11 at 17...
Performance of Arrays vs. Lists
...ut unless you need to micro-optimise, keep it simple and use List<T> etc.
Of course, this only applies if you are reading all of the data; a dictionary would be quicker for key-based lookups.
Here's my results using "int" (the second number is a checksum to verify they all did the same work)...
UIGestureRecognizer on UIImageView
I have a UIImageView , which I want to be able to resize and rotate etc.
8 Answers
8
...
How should one use std::optional?
... fail
This requires dynamic memory allocation, worrying about ownership, etc. - always prefer one of the other two signatures above.
Another example:
class Contact
{
std::optional<std::string> home_phone;
std::optional<std::string> work_phone;
std::optional<std::stri...
How to call a JavaScript function from PHP?
...me
window[returnedData]();
},
'text'
);
* Or JSON or XML etc.
share
|
improve this answer
|
follow
|
...
How do I read configuration settings from Symfony2 config.yml?
...ass Configuration implements ConfigurationInterface
{
public function getConfigTreeBuilder()
{
$treeBuilder = new TreeBuilder();
$rootNode = $treeBuilder->root( 'my_nice_project' );
$rootNode->children()->scalarNode( 'contact_email' )->end();
ret...