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Stop setInterval call in JavaScript
I am using setInterval(fname, 10000); to call a function every 10 seconds in JavaScript. Is it possible to stop calling it on some event?
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Exception thrown inside catch block - will it be caught again?
...compile, to avoid that kind of erroneous situation. In general, you're not allowed to have a catch for a subclass after a catch of its superclass in the same try block.
– Chris Jester-Young
Aug 22 '16 at 23:32
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Set up a scheduled job?
...Django, and I'm curious if there is a way to schedule a job to run periodically.
24 Answers
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Counting null and non-null values in a single query
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If I understood correctly you want to count all NULL and all NOT NULL in a column...
If that is correct:
SELECT count(*) FROM us WHERE a IS NULL
UNION ALL
SELECT count(*) FROM us WHERE a IS NOT NULL
Edited to have the full query, after reading the comments :]
S...
How can I eliminate slow resolving/loading of localhost/virtualhost (a 2-3 second lag) on Mac OS X L
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I had the exact same problem and it was driving me crazy!
Put all your hosts file entries for localhost into one line like so:
127.0.0.1 localhost myproject.dev myotherproject.dev
::1 localhost
fe80::1%lo0 localhost
Worked like a charm for me. Seems like a bug in Lion.
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Removing duplicate rows in vi?
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this hightlights all the duplicate lines for me but doesn't delete, am I missing a step here?
– ak85
Sep 14 '12 at 23:57
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difference between #if defined(WIN32) and #ifdef(WIN32)
... can do compound conditionals.
For example in your case:
#if defined(WIN32) && !defined(UNIX)
/* Do windows stuff */
#elif defined(UNIX) && !defined(WIN32)
/* Do linux stuff */
#else
/* Error, both can't be defined or undefined same time */
#endif
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Why do you have to link the math library in C?
...es libm, so if you compile a C++ program with GCC (g++), you will automatically get libm linked in.
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The case against checked exceptions
...jlsberg and his work, this argument has always struck me as bogus. It basically boils down to:
"Checked exceptions are bad because programmers just abuse them by always catching them and dismissing them which leads to problems being hidden and ignored that would otherwise be presented to the us...
Fixing slow initial load for IIS
... know, the timeout exists to save memory that other websites running in parallel on that machine might need. The price being that one time slow load time.
Besides the fact that the app pool gets shutdown in case of user inactivity, the app pool will also recycle by default every 1740 minutes (29 ho...