大约有 40,000 项符合查询结果（耗时：0.0399秒） [XML]
Using emit vs calling a signal as if it's a regular function in Qt
...e this:
#ifndef QT_NO_EMIT
# define emit
#endif
(The define guard is to allow you to use Qt with other frameworks that have colliding names via the no_keywords QMake config option.)
share
|
impro...
(Built-in) way in JavaScript to check if a string is a valid number
...
A very important note about parseInt is that it will allow you to specify a radix for converting the string to an int. This is a big gotcha as it tries to guess a radix for you if you don't supply it. So, for example: parseInt("17") results in 17 (decimal, 10), but parseInt("...
ASP.NET MVC Ajax Error handling
How do I handle exceptions thrown in a controller when jquery ajax calls an action?
6 Answers
...
Getting values from query string in an url using AngularJS $location
...e so:
$location.search().user
If you wish not to use a key, value like ?foo=bar, I suggest using a hash #test_user_bLzgB ,
and calling
$location.hash()
would return 'test_user_bLzgB' which is the data you wish to retrieve.
Additional info:
If you used the query string method and you are g...
jQuery - hashchange event
... of 2017, should anyone need it, is that onhashchange is well supported in all major browsers. See caniuse for details. To use it with jQuery no plugin is needed:
$( window ).on( 'hashchange', function( e ) {
console.log( 'hash changed' );
} );
Occasionally I come across legacy systems where ...
#ifdef vs #if - which is better/safer as a method for enabling/disabling compilation of particular s
...
My initial reaction was #ifdef, of course, but I think #if actually has some significant advantages for this - here's why:
First, you can use DEBUG_ENABLED in preprocessor and compiled tests. Example - Often, I want longer timeouts when debug is enabled, so using #if, I can write this
...
Override compile flags for single files
...
It would be preferable to use add_compile_options
add_compile_options(-Wall -Weffc++ -pedantic -std=c++0x)
or for CMake versions < 3.0 to do something more like:
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Weffc++ -pedantic -std=c++0x")
In response to further questions in the comment...
Initializing multiple variables to the same value in Java
...n, thirdPerson;
firstPerson = secondPerson = thirdPerson = new Person();
All the variables would be pointing to the same instance. Probably what you would need in that case is:
Person firstPerson = new Person();
Person secondPerson = new Person();
Person thirdPerson = new Person();
Or better ye...
jQuery how to bind onclick event to dynamically added HTML element [duplicate]
I want to bind an onclick event to an element I insert dynamically with jQuery
9 Answers
...
Checking Bash exit status of several commands efficiently
...ncourages bad practice. Consider the simple case of ls. If you invoke ls foo and get an error message of the form ls: foo: No such file or directory\n you understand the problem. If instead you get ls: foo: No such file or directory\nerror with ls\n you become distracted by superfluous informatio...