大约有 30,000 项符合查询结果（耗时：0.0550秒） [XML]
Returning a C string from a function
... important to know when you finally get around to allocating strings dynamically.
So, without this 'terminating zero', you don't have a string. You have an array of characters (also called a buffer) hanging around in memory.
Longevity of data:
The use of the function this way:
const char * myFun...
How can I have ruby logger log output to stdout as well as file?
...ug.log", "a")
Logger.new MultiIO.new(STDOUT, log_file)
Every time Logger calls puts on your MultiIO object, it will write to both STDOUT and your log file.
Edit: I went ahead and figured out the rest of the interface. A log device must respond to write and close (not puts). As long as MultiIO r...
Is it possible to animate scrollTop with jQuery?
...at. Be careful when specifying a complete() function inside the animate() call because it will get executed twice since you have two selectors declared (html and body).
$("html, body").animate(
{ scrollTop: "300px" },
{
complete : function(){
alert('this alert will popu...
Why do we use __init__ in Python classes?
... Spot is a bit of a cripple and is mostly yellow. The __init__ function is called a constructor, or initializer, and is automatically called when you create a new instance of a class. Within that function, the newly created object is assigned to the parameter self. The notation self.legs is an attri...
What is the Git equivalent for revision number?
We use SVN at work, but for my personal projects I decided to use Git. So I installed Git yesterday, and I wonder what is the revision number equivalent in Git .
...
How to set a default value with Html.TextBoxFor?
...e Html.TextBoxFor method, my first guess was to try the following which did not work:
12 Answers
...
MongoDB: How to update multiple documents with a single command?
...
didn't worked db.userActivity.find({ 'appId' : 1234, 'status' : 1}).update({ $set: { 'status': 1 } }); 2017-06-05T17:47:10.038+0530 E QUERY [thread1] TypeError: db.userActivity.find(...).update is not a function :
...
PHP expects T_PAAMAYIM_NEKUDOTAYIM?
...ach($cats as cat the only acceptable character after the cat for a syntactically valid statement is a ::, as it would allow you to specify a static property of some class called cat. Eg, if cat class has a public static member called $mouse, then foreach($cats as cat::$mouse) is perfectly valid php,...
jQuery: Test if checkbox is NOT checked
...ou want to iterate over checked elements use the parent element
$("#parentId").find("checkbox").each(function(){
if ($(this).prop('checked')==true){
//do something
}
});
More info:
This works well because all checkboxes have a property checked which stores the actual state of th...
Replacements for switch statement in Python?
...performance is an issue, so it doesn't re-build the dict on every function call
– Claudiu
Oct 23 '08 at 16:22
56
...