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Concatenate two string literals
...ncatenate a std::string object with a literal it will make the appropriate casting for the literal.
But if you try to concatenate two literals, the compiler won't be able to find an operator that takes two literals.
share
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How to compare two colors for similarity/difference
...t;/b> pctDiffRed = diffRed / 255; is going to give you 0 unless you cast to a float somewhere. <b>2</b> You'll need to multiply by 100 somewhere to get a percentage.
– vaughandroid
Jan 26 '12 at 12:34
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What does 'const static' mean in C and C++?
...e you saying const declaration implies static there as well? As in, if you cast const away, and modify the value, all values will be modified?
– Cookie
Mar 26 '14 at 20:44
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How to speed up insertion performance in PostgreSQL
...h statement using SQLSetConnectAttr(conn, SQL_ATTR_AUTOCOMMIT, reinterpret_cast<SQLPOINTER>(SQL_AUTOCOMMIT_OFF), 0);
Once all rows have been inserted, commit the transaction using SQLEndTran(SQL_HANDLE_DBC, conn, SQL_COMMIT);. There is no need to explicitly open a transaction.
Unfortunately,...
How do I check if a list is empty?
... Part 1
The "pythonic" way fails with NumPy arrays because NumPy tries to cast the array to an array of bools, and if x tries to evaluate all of those bools at once for some kind of aggregate truth value. But this doesn't make any sense, so you get a ValueError:
>>> x = numpy.array([0,1]...
Random string generation with upper case letters and digits
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If you want to skip the string casting & hyphen replacing, you can just call my_uuid.get_hex() or uuid.uuid4().get_hex() and it will return a string generated from the uuid that does not have hyphens.
– dshap
Apr ...
Difference between decimal, float and double in .NET?
...a double/float.
Decimals and Floats/Doubles cannot be compared without a cast whereas Floats and Doubles can. Decimals also allow the encoding or trailing zeros.
float flt = 1F/3;
double dbl = 1D/3;
decimal dcm = 1M/3;
Console.WriteLine("float: {0} double: {1} decimal: {2}", flt, dbl, dcm);
Res...
How to strip all non-alphabetic characters from string in SQL Server?
...nstead of NVARCHAR within his function otherwise, your system will need to cast the string values from VARCHAR to NVARCHAR before it can perform the function which is more expensive. Even with those changes your function still might be faster, but those are a few examples I can see where his functi...
Checking for empty arrays: count vs empty
...
Alternatively, you can cast the variable as a boolean (implicitly or explicitly):
if( $value )
{
// array is not empty
}
if( (bool) $value )
{
// array is still not empty
}
This method does generate an E_NOTICE if the variable is not define...
How do I unit test web api action method when it returns IHttpActionResult?
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Time to resurrect a dead question
The current answers all rely on casting the response object to a known type. Unfortunately, the responses do not seem to have a useable hierarchy or implicit conversion path for this to work without intimate knowledge of the controller implementation. Consi...