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Why does scanf() need “%lf” for doubles, when printf() is okay with just “%f”?
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Since С99 the matching between format specifiers and floating-point argument types in C is consistent between printf and scanf. It is
%f for float
%lf for double
%Lf for long double
It just so happens that when arguments of type float are passed as variadic parameters,...
Object reference not set to an instance of an object.Why doesn't .NET show which object is `null`?
Regarding this .NET unhandled exception message:
5 Answers
5
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Check a collection size with JSTL
...r Facelets:
<... xmlns:fn="http://java.sun.com/jsp/jstl/functions">
And use like this in your page:
<p>The length of the companies collection is: ${fn:length(companies)}</p>
So to test with length of a collection:
<c:if test="${fn:length(companies) gt 0}">
</c:if>
A...
How do I declare a global variable in VBA?
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When I try to declare an array as public it says: array and user-defined data types can't be declared as public.
– kapilddit
Nov 13 '19 at 12:25
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How to convert a number to string and vice versa in C++
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Update for C++11
As of the C++11 standard, string-to-number conversion and vice-versa are built in into the standard library. All the following functions are present in <string> (as per paragraph 21.5).
string to numeric
float stof(const s...
How can I measure the actual memory usage of an application or process?
...r example, Valgrind can give you insights about the amount of memory used, and, more importantly, about possible memory leaks in your program. The heap profiler tool of Valgrind is called 'massif':
Massif is a heap profiler. It performs detailed heap profiling by taking regular snapshots of a prog...
How to generate sample XML documents from their DTD or XSD?
...answered Aug 26 '08 at 14:05
levandlevand
7,87222 gold badges3636 silver badges5252 bronze badges
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Math functions in AngularJS bindings
...a use case where I have multiple templates with completely different logic and want to isolate them as much as possible. Perfect
– Yablargo
Nov 6 '13 at 2:16
49
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What's the best way to convert a number to a string in JavaScript? [closed]
...he only conceivable: the number does not care nor know how it was entered, and the standard printed representation is with exactly one digit before the dot.
– Svante
Sep 2 '15 at 18:32
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Using union and order by clause in mysql
...all
select 3 as Rank, id, add_date from Table where distance between 5 and 15
) a
order by rank, id, add_date desc
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