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MySQL - force not to use cache for testing speed of query
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This stops it from caching the results but does it also stop it from using the cache?
– Brett
Mar 18 '15 at 15:53
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How to check 'undefined' value in jQuery
... }, is that typeof will never raise an exception in case if variable value does not exist.
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Literal suffix for byte in .NET?
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One, the B suffix is ambiguous if you're writing in hexadecimal (what
does 0xFFB mean?) and even if we had a solution for that, or another
character than 'B' ('Y' was considered, F# uses this) no one could
remember whether the default was signed or unsigned - .NET bytes are
unsigned by de...
Creating temporary files in bash
...s to make a temporary directory using the same naming scheme. While
this does allow one to guarantee that a temporary file will not be
subverted, it still allows a simple denial of service attack. For
these reasons it is suggested that mktemp be used instead.
In a script, I invoke mktemp so...
How to do SELECT COUNT(*) GROUP BY and ORDER BY in Django?
.../ for more insight
Good to note: if using Count, the value passed to Count does not affect the aggregation, just the name given to the final value. The aggregator groups by unique combinations of the values (as mentioned above), not by the value passed to Count. The following queries are the same:
T...
Replace all spaces in a string with '+' [duplicate]
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Here's an alternative that doesn't require regex:
var str = 'a b c';
var replaced = str.split(' ').join('+');
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Which method performs better: .Any() vs .Count() > 0?
...>, List<T>, etc) - then this will be the fastest option, since it doesn't need to go through the GetEnumerator()/MoveNext()/Dispose() sequence required by Any() to check for a non-empty IEnumerable<T> sequence.
For just IEnumerable<T>, then Any() will generally be quicker, as i...
PHP YAML Parsers [closed]
Does anyone know of a good YAML Parser for PHP? If so, what are the pros and cons of this library?
8 Answers
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How to hide Bootstrap modal with javascript?
...ascript is not being sent from the server to the browser correctly.
If it doesn't work then you need to investigate further on the client what is happening. Eg make sure that there aren't two elements with the same id. Eg does it work the first time after page load but not the second time?
Browser...
MySQL: Transactions vs Locking Tables
... How to write INSERT IF NOT EXISTS queries in standard SQL
I realise this does not directly answer your question but the same principle of performing an check and insert as a single statement is very useful; you should be able to modify it to perform your update.
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