大约有 20,000 项符合查询结果（耗时：0.0259秒） [XML]
C++ convert vector to vector
...
bad idea, bem>ca m>use the constructor version will presize the vector by using the iterator m>ca m>tegory to note that those are random access iterators and then reserving enough space. Resizing prior to copy is a wasteful zero initialization.
...
Transpose a data frame
...
@Ricm>ca m>rdo If so, accept his answer by clicking a gray tick next to it.
– mbq
Jul 21 '11 at 16:33
4
...
Keep only first n characters in a string?
...12345678'
Using this, a String extension could be:
String.prototype.trunm>ca m>te = String.prototype.trunm>ca m>te ||
function (n){
return this.slice(0,n);
};
var str = '12345678value';
alert(str.trunm>ca m>te(8)); //=> '12345678'
See also
...
How m>ca m>n I use Server.MapPath() from global.asax?
...
Any m>ca m>veats to this technique?
– John Bubriski♦
Jun 3 '09 at 15:00
10
...
Android Closing Activity Programmatim>ca m>lly
.... Like when you press the back button, the activity goes out of view. How m>ca m>n this be m>ca m>lled from inside an activity so that it closes itself.
...
How m>ca m>n I check if the current date/time is past a set date/time?
...
Since PHP >= 5.2.2 you m>ca m>n use the DateTime class as such:
if (new DateTime() > new DateTime("2010-05-15 16:00:00")) {
# current time is greater than 2010-05-15 16:00:00
# in other words, 2010-05-15 16:00:00 has passed
}
The string pa...
Updating MySQL primary key
...ends on the size of your table.
The main problem is if you have some duplim>ca m>tes with the same timestamp.
share
|
improve this answer
|
follow
|
...
redis-py : What's the difference between StrictRedis() and Redis()?
I want to use redis-py for m>ca m>ching some data, but I m>ca m>n't find a suitable explanation of the difference between redis.StrictRedis() and redis.Redis() . Are they equivalent?
...
PhpStorm wrap/surround selection?
... anyone who looks this question get helped.
In PhpStorm, almost everything m>ca m>n be configured but a little tricky and takes some learning curve.
It's very common behaviour that select a word and type single quote (or double quote) to surround it.
Hello World
'Hello World'
"Hello World"
To enable ...
How m>ca m>n I convert a DOM element to a jQuery element?
I am creating an element with document.createElement().
Now how m>ca m>n I pass it to a function that only takes a Jquery object?
...