大约有 30,000 项符合查询结果（耗时：0.0474秒） [XML]
get NSDate today, yesterday, this Week, last Week, this Month, last Month… variables
...s taken from Google
NSDate *yesterday = [today dateByAddingTimeInterval: -86400.0];
NSDate *thisWeek = [today dateByAddingTimeInterval: -604800.0];
NSDate *lastWeek = [today dateByAddingTimeInterval: -1209600.0];
// To get the correct number of seconds in each month use NSCalendar
NSDate *thisMon...
Select distinct values from a table field
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
Draft saved
Draft discarded
...
Is there an auto increment in sqlite?
...n alias for the
ROWID (except in WITHOUT ROWID tables) which is always a 64-bit signed
integer.
On an INSERT, if the ROWID or INTEGER PRIMARY KEY column is not
explicitly given a value, then it will be filled automatically with an
unused integer, usually one more than the largest ROWID cur...
Django Model - Case-insensitive Query / Filtering
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
Draft saved
Draft discarded
...
How to count TRUE values in a logical vector
...ystem.time(length(which(z)))
user system elapsed
1.34 0.28 1.64
system.time(table(z)["TRUE"])
user system elapsed
10.62 0.52 11.19
So clearly using sum is the best approach in this case. You may also want to check for NA values as Marek suggested.
Just to add a note r...
Android ACTION_IMAGE_CAPTURE Intent
... mRequestCode);
then in activity that i return to, i do different things based on the device.
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
switch (requestCode) {
case GlobalConstants.IMAGE_CAPTURE:
Uri u;
if (hasImageCap...
Difference between del, remove and pop on lists
...
Remember guys... anything index based is one shot O(n-1)... if you have to do a lookup (by value), it will traverse the collection until the element is found.
– Pepito Fernandez
Oct 14 '17 at 14:13
...
Cookies on localhost with explicit domain
...I modified that portion of my code to conditionally set the 'secure' param based on $_SERVER['HTTP_HOST'] being 'localhost' or not. Working well now.
I hope this helps someone.
share
|
improve this...
How do I activate a virtualenv inside PyCharm's terminal?
...
Based on answers from Peter and experimentation, I've come up with a good "general solution", which solves the following:
Restores the behaviour of a login shell. PyCharm normally runs a login shell, but --rcfile stopped th...
Find a pair of elements from an array whose sum equals a given number
...
64
Implementation in Java : Using codaddict's algorithm (Maybe slightly different)
import java.ut...