大约有 40,000 项符合查询结果（耗时：0.0420秒） [XML]
How to unset a JavaScript variable?
...ed.
(1) If it is created with var, it cannot be deleted.
For example:
var g_a = 1; //create with var, g_a is a variable
delete g_a; //return false
console.log(g_a); //g_a is still 1
(2) If it is created without var, it can be deleted.
g_b = 1; //create without var, g_b is a property
delete g_b; /...
How do I remove the last comma from a string using PHP?
...
Use the rtrim function:
rtrim($my_string, ',');
The Second parameter indicates the character to be deleted.
share
|
improve this answer
|
...
What is meant by Resource Acquisition is Initialization (RAII)?
...ourceHandle {
public:
ManagedResourceHandle(RawResourceHandle* rawHandle_) : rawHandle(rawHandle_) {};
~ManagedResourceHandle() {delete rawHandle; }
... // omitted operator*, etc
private:
RawResourceHandle* rawHandle;
};
ManagedResourceHandle handle(createNewResource());
handle->perf...
Create an index on a huge MySQL production table without table locking
...
for n in {1..50}; do
#(time mysql -uroot -e 'select * from website_development.users where id = 41225\G'>/dev/null) 2>&1 | grep real;
(time mysql -uroot -e 'update website_development.users set bio="" where id = 41225\G'>/dev/null) 2>&1 | grep real;
done
) | cat -n...
jQuery.inArray(), how to use it right?
...
Thanks @Chips_100 for showing us visual learners how to do it right, it'd be nice if jQuery could update to include that in their own example.
– asherrard
Dec 1 '15 at 15:21
...
Add a CSS border on hover without moving the element [duplicate]
...ing when the thick border is applied. codepen
– aleph_one
Mar 18 at 18:36
add a comment
...
How to get JQuery.trigger('click'); to initiate a mouse click
...ed.
For example, I have some code that I want to be executed when #expense_tickets value is changed, and also, when page is reload
$(function() {
$("#expense_tickets").change(function() {
// code that I want to be executed when #expense_tickets value is changed, and also, when page is relo...
怎么往SetTimer的回调函数传递参数 - C/C++ - 清泛网 - 专注C/C++及内核技术
...立一个Win32工程，然后看自动生成的代码：
int APIENTRY _tWinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
int nCmdShow)
{
...
// 主消息循环:
while (GetMessage(&msg...
Error: Can't set headers after they are sent to the client
...) {
if (err) {
res.send(err);
} else {
User.findOneAndUpdate({ _id: req.user._id }, { $push: { article: doc._id } })
.exec(function(err, doc2) {
if (err) res.send(err);
else res.json(doc2); // Will be called second.
})
res.json(doc1); // Will be ...
How to check what user php is running as?
...
If available you can probe the current user account with posix_geteuid and then get the user name with posix_getpwuid.
$username = posix_getpwuid(posix_geteuid())['name'];
If you are running in safe mode however (which is often the case when exec is disabled), then it's unlikely tha...