大约有 34,900 项符合查询结果（耗时：0.0403秒） [XML]
Unix command to prepend text to a file
....old '1s;^;to be prepended;' inFile
-i writes the change in place and take a backup if any extension is given. (In this case, .old)
1s;^;to be prepended; substitutes the beginning of the first line by the given replacement string, using ; as a command delimiter.
...
Counting the number of elements with the values of x in a vector
...]
435
3
Or convert it into a data.frame if you're more comfortable working with that:
> as.data.frame(table(numbers))
numbers Freq
1 4 2
2 5 1
3 23 2
4 34 2
...
share
...
How to resolve git's “not something we can merge” error
...h that doesn't exist.
If that is not the problem (as in my case), it is likely that you don't have a local copy of the branch that you want to merge. Git requires local knowledge of both branches in order to merge those branches. You can resolve this by checking out the branch to merge and then goi...
C++: what regex library should I use? [closed]
I'm working on a commercial (not open source) C++ project that runs on a linux-based system. I need to do some regex within the C++ code. (I know: I now have 2 problems.)
...
Cannot use a CONTAINS or FREETEXT predicate on table or indexed view because it is not full-text ind
...
Make sure you have full-text search feature installed.
Create full-text search catalog.
use AdventureWorks
create fulltext catalog FullTextCatalog as default
select *
from sys.fulltext_catalogs
Create full-text search ...
How do I schedule jobs in Jenkins?
I added a new job in Jenkins, which I want to schedule periodically.
10 Answers
10
...
Most pythonic way to delete a file which may not exist
...:
try:
os.remove(filename)
except OSError:
pass
Although this takes even more lines and looks very ugly, it avoids the unnecessary call to os.path.exists() and follows the python convention of overusing exceptions.
It may be worthwhile to write a function to do this for you:
import os, ...
Unable to run app in Simulator: Xcode beta 6 iOS 8
...e iOS Simulator's menu
Select Hardware > Device > Manage Devices
Click on the little + sign at the bottom
Add (if missing) all the devices that you want, or delete and recreate the ones malfunctioning.
If anyone of the simulator is not working then right click on it and delete it and then re-c...
Is there a CSS selector for the first direct child only?
...
MatchuMatchu
74.3k1414 gold badges145145 silver badges157157 bronze badges
...
Get the size of the screen, current web page and browser window
...dth , screenHeight , pageX , pageY , screenX , screenY which will work in all major browsers?
19 Answers
...