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Where is the itoa function in Linux?
itoa() is a really handy function to convert a number to a string. Linux does not seem to have itoa() , is there an equivalent function or do I have to use sprintf(str, "%d", num) ?
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Find index of last occurrence of a sub-string using T-SQL
...create function fnLastIndexOf(@text varChar(max),@char varchar(1))
returns int
as
begin
return len(@text) - charindex(@char, reverse(@text)) -1
end
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(-2147483648> 0) returns true in C++?
...whose integer conversion rank (4.13) is less than the rank of
int can be converted to a prvalue of type int if int can represent all
the values of the source type; otherwise, the source prvalue can be
converted to a prvalue of type unsigned int.
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How can I truncate a double to only two decimal places in Java?
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Formating as a string and converting back to double i think will give you the result you want.
The double value will not be round(), floor() or ceil().
A quick fix for it could be:
String sValue = (String) String.format("%.2f", oldValue);
Double ...
Is it better practice to use String.format over string Concatenation in Java?
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@AmirRaminar: The compiler converts "+" to calls to StringBuilder automatically.
– Martin Schröder
Feb 23 '12 at 14:50
43
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Can someone explain __all__ in Python?
...lias their imports, for example, in ctypes/__init__.py:
import os as _os, sys as _sys
Using the _ convention can be more elegant because it removes the redundancy of naming the names again. But it adds the redundancy for imports (if you have a lot of them) and it is easy to forget to do this cons...
How can I reliably get an object's address when operator& is overloaded?
...ent and returning no result. This reference to a function can be trivially converted into a pointer to function -- from @Konstantin: According to 13.3.3.2 both T & and T * are indistinguishable for functions. The 1st one is an Identity conversion and the 2nd one is Function-to-Pointer conversion...
How to convert an enum type variable to a string?
...stead, but I think it's a bit cleaner to require an explicit "ToString" to convert the value to string form.
As a usage example, your OS_type enumeration would be defined as follows:
DEFINE_ENUM_WITH_STRING_CONVERSIONS(OS_type, (Linux)(Apple)(Windows))
While the macro looks at first like it is a...
Verify version of rabbitmq
...q can not start I found the only way to determine version is via installer system.
Eample Debian/Ubuntu:
dpkg -s rabbitmq-server | grep Version
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Why is iostream::eof inside a loop condition (i.e. `while (!stream.eof())`) considered wrong?
...ful.
// if it wasn't, the returned stream from operator>> would be converted to false
// and the loop wouldn't even be entered
// do stuff with correctly initialized data (hopefully)
}
And on your second question: Because
if(scanf("...",...)!=EOF)
is the same as
if(!(inStream >&...