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git produces Gtk-WARNING: cannot open display
...dmin rights and after running git push origin master I get the following error message:
4 Answers
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Git Push error: refusing to update checked out branch
...flicts, committed then tried to Push my changes and received the following error:
11 Answers
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AJAX in Chrome sending OPTIONS instead of GET/POST/PUT/DELETE?
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I had a similar issue with my own proxy to bypass CORS and I got the same error of POST->OPTION in Chrome. It was the Authorization header in my case ("x-li-format" and "X-UserName" here in your case.) I ended up passing it in a dummy format (e.g. AuthorizatinJack in GET) and I changed the cod...
“Invalid signature file” when attempting to run a .jar
...castle . My code compiles fine, but running the jar leads to the following error:
21 Answers
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Dynamically load JS inside JS [duplicate]
... An additional problem is that this would swallow any syntax errors. So you'd want to catch them in fail().
– Vanuan
Jan 31 '17 at 1:25
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Difference between .success() and .complete()?
...ery 1.5, all jQuery's AJAX methods return a jqXHR object that provides .error() , .success() , and .complete() methods.
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Globally catch exceptions in a WPF application?
...ise continue program execution as if nothing happened (kinda like VB's On Error Resume Next ).
6 Answers
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What is the use case of noop [:] in bash?
...o" != "1" ]
then
#echo Success
fi
Which causes bash to give a syntax error:
line 4: syntax error near unexpected token `fi'
line 4: `fi'
Bash can't have empty blocks (WTF). So you add a no-op:
if [ "$foo" != "1" ]
then
#echo Success
:
fi
or you can use the no-op to comment out...
Difference between binary semaphore and mutex
... to semGive a mutex currently held by Task A, Task B's call will return an error and fail.
Mutexes always use the following sequence:
- SemTake
- Critical Section
- SemGive
Here is a simple example:
Thread A Thread B
Take Mutex
access data
... ...
Make sure only a single instance of a program is running
...cntl.LOCK_EX | fcntl.LOCK_NB)
already_running = False
except IOError:
already_running = True
return already_running
A lot like S.Lott's suggestion, but with the code.
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