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How to RSYNC a single file?
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edited Aug 24 at 9:00
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answered Feb 15 '13 at 4:36
Michael PlaceMichael...
Select rows which are not present in other table
....ip
WHERE i.ip IS NULL;
EXCEPT
Short. Not as easily integrated in more complex queries.
SELECT ip
FROM login_log
EXCEPT ALL -- "ALL" keeps duplicates and makes it faster
SELECT ip
FROM ip_location;
Note that (per documentation):
duplicates are eliminated unless EXCEPT ALL is used.
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How to set an environment variable only for the duration of the script?
...s to run vblank_mode=0 glxgears. It works, but it also says vblank_mode=0: command not found after running, whereas prepending env doesn't cause this. [testing...] Apparently zsh doesn't like it (yet still uses it correctly), but bash is fine with it. I guess I'll go with the env method from now on....
How find all unused classes in Intellij Idea?
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Press Ctrl+Shift+A (in Mac Command+Shift+A)
Enter "unused declar"
Double-click on "Unused declaration"
Settings will pop up
Click on Java/Declaration redundancy/Unused declaration
on the right bottom select "On the fly editor settings"
untick check...
How do I choose grid and block dimensions for CUDA kernels?
...ummarized as:
Each block cannot have more than 512/1024 threads in total (Compute Capability 1.x or 2.x and later respectively)
The maximum dimensions of each block are limited to
[512,512,64]/[1024,1024,64] (Compute 1.x/2.x or later)
Each block cannot consume more than 8k/16k/32k/64k/32k/64k/32k/6...
Synchronously waiting for an async operation, and why does Wait() freeze the program here
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The await inside your asynchronous method is trying to come back to the UI thread.
Since the UI thread is busy waiting for the entire task to complete, you have a deadlock.
Moving the async call to Task.Run() solves the issue.
Because the async call is now running on a thread p...
Select statement to find duplicates on certain fields
...k for more information on how to delete the rows.
http://support.microsoft.com/kb/139444
There should be a criterion for deciding how you define "first rows" before you use the approach in the link above. Based on that you'll need to use an order by clause and a sub query if needed. If you can post ...
How do I read image data from a URL in Python?
... do is fairly simple when we're dealing with a local file, but the problem comes when I try to do this with a remote URL.
1...
How to get key names from JSON using jq
curl http://testhost.test.com:8080/application/app/version | jq '.version' | jq '.[]'
7 Answers
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vs
...namespace in C++ is a minefield, try to avoid it. One might argue that the committee has ratified a practice by implementations that is nearly as harmful as sticking using namespace std; at top level in a header file -- the difference being that the implementations only do it for symbols in the C st...