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Get size of all tables in database
...S SchemaName,
p.rows,
SUM(a.total_pages) * 8 AS TotalSpaceKB,
CAST(ROUND(((SUM(a.total_pages) * 8) / 1024.00), 2) AS NUMERIC(36, 2)) AS TotalSpaceMB,
SUM(a.used_pages) * 8 AS UsedSpaceKB,
CAST(ROUND(((SUM(a.used_pages) * 8) / 1024.00), 2) AS NUMERIC(36, 2)) AS UsedSpaceMB,
...
How does a PreparedStatement avoid or prevent SQL injection?
...g. But the input parameters will be sent to the database & appropriate cast/conversions will be applied prior to creating an actual SQL statement.
To give you an example, it might try and see if the CAST/Conversion works.
If it works, it could create a final statement out of it.
SELECT * Fr...
How to avoid overflow in expr. A * B - C * D
...ere's a work-around that only relies on implementation-defined behavior of casting unsigned integer to signed integer. But this can be expected to work on almost every system today.
(long long)((unsigned long long)A * B - (unsigned long long)C * D)
This casts the inputs to unsigned long long wher...
Swapping two variable value without using third variable
...ks for all integer values (that includes pointers then, with some luck and casting). For the sake of completeness I would like to mention another less powerful algorithm with addition/subtraction:
A = A + B
B = A - B
A = A - B
Here you have to be careful of overflows/underflows, but otherwise it ...
Covariance, Invariance and Contravariance explained in plain English?
...fferent generics parameters. Their relationships are the reason why we can cast them.
Co and Contra variance are pretty logical things. Language type system forces us to support real life logic. It's easy to understand by example.
Covariance
For instance you want to buy a flower and you have two ...
How does one generate a random number in Apple's Swift language?
...nteger between 0 and n-1.
let diceRoll = Int(arc4random_uniform(6) + 1)
Cast the result to Int so you don't have to explicitly type your vars as UInt32 (which seems un-Swifty).
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techniques for obscuring sensitive strings in C++
...
Basically, anyone with access to your program and a debugger can and will find the key in the application if they want to.
But, if you just want to make sure the key doesn't show up when running strings on your binary, you could for instance make sure that the key is no...
When would anyone use a union? Is it a remnant from the C-only days?
...pace.
We could use a wacky container of void* pointers to Bx objects with casts to retrieve them, but that's fugly and so C-style... but more importantly that would leave us with the lifetimes of many dynamically allocated objects to manage.
Instead, what can be done is this:
union Bee
{
B1 b...
Calculating the difference between two Java date instances
...oid. Rounding errors exist. Example 19th to 21st May says 1 day because it casts 1.99 to 1. Use round before casting to int.
– Pratik Mandrekar
May 1 '13 at 14:51
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How can I convert NSDictionary to NSData and vice versa?
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For NSData -> NSDictionary, the cast to NSDictionary seems unnecessary.
– Pang
Dec 30 '15 at 8:11
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