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CHECK constraint in MySQL is not working
...e MySQL Reference Manual says:
The CHECK clause is parsed but ignored by all storage engines.
Try a trigger...
mysql> delimiter //
mysql> CREATE TRIGGER trig_sd_check BEFORE INSERT ON Customer
-> FOR EACH ROW
-> BEGIN
-> IF NEW.SD<0 THEN
-> SET NEW.SD...
Overlaying histograms with ggplot2 in R
...h this could just be due to my lack of knowledge). The other answer below by @kohske will by default display a legend which can then be modified (along with the specific colors displayed on the histogram) with, e.g. scale_fill_manual().
– Michael Ohlrogge
Sep ...
What are the file limits in Git (number and size)?
...mous (but inter-dependent) parts, you must use submodules.
As illustrated by Talljoe's answer, the limit can be a system one (large number of files), but if you do understand the nature of Git (about data coherency represented by its SHA-1 keys), you will realize the true "limit" is a usage one: i....
Does making a struct volatile make all its members volatile?
... involving the object
because the value of the object might
be changed by means undetectable by an
implementation. See 1.9 for detailed
semantics. In general, the semantics
of volatile are intended to be the
same in C + + as they are in C. ]
That means, if your object is an instance of...
Simple tool to 'accept theirs' or 'accept mine' on a whole file using git
...
@Santhos: the -- is used by Git to separate revisions (branch names etc.) from path names (filenames, directories). It is important if Git cannot decide if a name is the name of branch or the name of file. This follows POSIX (or GNU) convention of ...
My attempt at value initialization is interpreted as a function declaration, and why doesn't A a(())
... no enlightened answer, it's just because it's not defined as valid syntax by the C++ language... So it is so, by definition of the language.
If you do have an expression within then it is valid. For example:
((0));//compiles
Even simpler put: because (x) is a valid C++ expression, while () i...
TypeError: sequence item 0: expected string, int found
...the [,] from your second example, a list comprehension is not required and by removing them you have a generator which is more efficient.
– jamylak
Jun 4 '12 at 12:01
3
...
What is the proper way to comment functions in Python?
... string. It doesn't need to be multiline and double quotes can be replaced by single quotes.
See: PEP 257
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XAMPP, Apache - Error: Apache shutdown unexpectedly
...ues, none of the other answers resolved my issue.
As the port is not used by Skype, but by some other internal applications,
I followed the below steps to resolve the issue:
Step 1 - From the XAMPP Control Panel, under Apache, click the Config button, and select the Apache (httpd.conf).
Inside th...
Load Testing with AB … fake failed requests (length)
...as the first that popped up in Google. Sometimes the length error reported by ab may have been caused by a real problem: if the connection is closed server-side before the total amount of bytes declared in the Content-Length header has not been received by the client. That can happen if there are ot...