大约有 36,010 项符合查询结果（耗时：0.0446秒） [XML]
How do I get the current date and time in PHP?
...te in a different time zone,
* say if you come from Nairobi, Kenya like I do, you can set
* the time zone to Nairobi as shown below.
*/
date_default_timezone_set('Africa/Nairobi');
// Then call the date functions
$date = date('Y-m-d H:i:s');
// Or
$date = date('Y/m/d H:i:s');
// date_default_t...
What is the use of interface constants?
...tants() {
// restrict instantiation
}
public static final double PI = 3.14159;
public static final double PLANCK_CONSTANT = 6.62606896e-34;
}
And to access the constants without having to fully qualify them (i.e. without having to prefix them with the class name), use a static...
Performance - Date.now() vs Date.getTime()
... construction (or at whatever time/date it's been set to). That is, if you do this:
var now = new Date();
and then wait a while, a subsequent call to now.getTime() will tell the time at the point the variable was set.
sha...
When do I need to use AtomicBoolean in Java?
...
It doesn't look like a real-world example - other thread can see true when initialize() haven't been completed. So, it works only if other threads don't care about completion of initialize().
– axtavt
...
How can I clear previous output in Terminal in Mac OS X?
I know the clear command that 'clears' the current screen, but it does this just by printing lots of newlines - the cleared contents just get scrolled up.
...
Delete sql rows where IDs do not have a match from another table
...ier - "wrong" is a bit strong. To make sure people understand, the answers do work if fileidis non-nullable. Also, the third solution (NOT IN) only requires that f.id by non-nullable. Presumably that is a primary key, so it would be.
– ToolmakerSteve
Sep 26 '16...
Why does 'continue' behave like 'break' in a Foreach-Object?
If I do the following in a PowerShell script:
4 Answers
4
...
What are the main performance differences between varchar and nvarchar SQL Server data types?
...
Always use nvarchar.
You may never need the double-byte characters for most applications. However, if you need to support double-byte languages and you only have single-byte support in your database schema it's really expensive to go back and modify throughout your ap...
Selecting a row in DataGridView programmatically
...
Not tested, but I think you can do the following:
dataGrid.Rows[index].Selected = true;
or you could do the following (but again: not tested):
dataGrid.SelectedRows.Clear();
foreach(DataGridViewRow row in dataGrid.Rows)
{
if(YOUR CONDITION)
r...
Python int to binary string?
...ke a format spec.
>>> "{0:b}".format(37)
'100101'
Format spec docs for Python 2
Format spec docs for Python 3
share
|
improve this answer
|
follow
...