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How do I create a foreign key in SQL Server?
... I agree naming constraints is a good plan but, in SQL Server 2008 R2 at least, the syntax of the last line has to be "constraint fk_questionbank_exams foreign key (question_exam_id) references exams (exam_id)"
– Jonathan Sayce
Apr 16 '12 at 14:23
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Where and why do I have to put the “template” and “typename” keywords?
... exactly is a dependent name. On a simple read (you know, the principle of least surprise), all it defines as a dependent name is the special case for function names below. But since clearly T::x also needs to be looked up in the instantiation context, it also needs to be a dependent name (fortunate...
On a CSS hover event, can I change another div's styling? [duplicate]
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Then at the very least offer an explanation of why css is inadequate, and what the other, more suitable, options are. I don't think that just throwing a jQuery solution into the question is particularly useful.
– David s...
What is the best way to trigger onchange event in react js
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At least on text inputs, it appears that onChange is listening for input events:
var event = new Event('input', { bubbles: true });
element.dispatchEvent(event);
...
Finding the id of a parent div using Jquery
... I think the 'div:eq(0)' will be wrong if this is all wrapped in at least one div, because you're doing an absolute traversal of the DOM rather than a relative one. Which would be fine if the first element were the "closest" parent, but this suggests otherwise: tinyurl.com/bbegow
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How to get last N records with activerecord?
... Note: this is not a good way of implementing it, performance-wise - at least not up to Rails 3.1. SomeModel.last(5) will execute the select statement without a limit, returning all records of SomeModel to Ruby as an array, after which Ruby will pick out the last (5) elements. Efficiency-wise, c...
Why does the C preprocessor interpret the word “linux” as the constant “1”?
... 10.8.5, I got the output:
#define __DBL_MIN_EXP__ (-1021)
#define __UINT_LEAST16_MAX__ 65535
#define __ATOMIC_ACQUIRE 2
#define __FLT_MIN__ 1.17549435082228750797e-38F
#define __UINT_LEAST8_TYPE__ unsigned char
#define __INTMAX_C(c) c ## L
#define __CHAR_BIT__ 8
#define __UINT8_MAX__ 255
#define _...
CSS media queries: max-width OR max-height
...wing evaluate as true:
The media type is 'screen' and
The viewport is at least 700px wide and
Screen orientation is currently landscape.
Note: I believe that used together, these three feature queries make up a single media query.
2. OR (Comma-separated lists)
Rather than an or keyword, comma-...
In pure functional languages, is there an algorithm to get the inverse function?
...g j (B1 : repeat B0) to a depth of n+j > n
evaluate head $ g j l for at least n different lists matching replicate (n+j) B0 ++ B1 : ls
Up to that point, at least one of the g j is indistinguishable from f, and since inv f hadn't done either of these evaluations, inv could not possibly have told...
Select last row in MySQL
...he primary key is how data is ordered in the database files (for InnoDB at least), and the RDBMS knows where that data ends, and it can optimize order by id + limit 1 to be the same as reach the max(id)
Now the road less traveled is when you don't have an autoincremented primary key. Maybe the prim...