大约有 44,400 项符合查询结果（耗时：0.0555秒） [XML]
Check if element is visible in DOM
...
652
According to this MDN documentation, an element's offsetParent property will return null wheneve...
How to sort List of objects by some property
...
12 Answers
12
Active
...
On Duplicate Key Update same as insert
... update it in any case?
For eg. if your columns a to g are already set as 2 to 8; there would be no need to re-update it.
Alternatively, you can use:
INSERT INTO table (id,a,b,c,d,e,f,g)
VALUES (1,2,3,4,5,6,7,8)
ON DUPLICATE KEY
UPDATE a=a, b=b, c=c, d=d, e=e, f=f, g=g;
To get the id from ...
How do I check the difference, in seconds, between two dates?
...ates, use total_seconds like this:
import datetime as dt
a = dt.datetime(2013,12,30,23,59,59)
b = dt.datetime(2013,12,31,23,59,59)
(b-a).total_seconds()
86400.0
#note that seconds doesn't give you what you want:
(b-a).seconds
0
...
How set maximum date in datepicker dialog in android?
...
answered May 25 '13 at 12:19
ozbekozbek
19.7k44 gold badges5353 silver badges7878 bronze badges
...
How to redirect stderr to null in cmd.exe
...
Your DOS command 2> nul
Read page Using command redirection operators. Besides the "2>" construct mentioned by Tanuki Software, it lists some other useful combinations.
...
Install Gem from Github Branch?
...
201
You don't need to build the gem locally. In your gemfile you can specify a github source with ...
Naming of enums in Java: Singular or Plural?
...
2 Answers
2
Active
...