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How does the Java 'for each' loop work?
...or any object that implements the Iterable interface.
Also, if the right-hand side of the for (:) idiom is an array rather than an Iterable object, the internal code uses an int index counter and checks against array.length instead. See the Java Language Specification.
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Why does scanf() need “%lf” for doubles, when printf() is okay with just “%f”?
...ype float are passed as variadic parameters, such arguments are implicitly converted to type double. This is the reason why in printf format specifiers %f and %lf are equivalent and interchangeable. In printf you can "cross-use" %lf with float or %f with double.
But there's no reason to actually do...
Scale Image to fill ImageView width and keep aspect ratio
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Without using any custom classes or libraries:
<ImageView
android:id="@id/img"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:scaleType="fitCenter" />
scaleType="fitCenter" (default when omitted)
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method overloading vs optional parameter in C# 4.0 [duplicate]
...DoFoo(c:"Hello There, John Doe")
This call takes parameter a value as 10 and parameter b as 23.
Another variant of this call - notice you don't need to set the parameter values in the order as they appear in the method signature, the named parameter makes the value explicit.
DoFoo(c:"hello again...
What should main() return in C and C++?
...t is the correct (most efficient) way to define the main() function in C and C++ — int main() or void main() — and why? And how about the arguments?
If int main() then return 1 or return 0 ?
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Default value of function parameter
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If you put the declaration in a header file, and the definition in a separate .cpp file, and #include the header from a different .cpp file, you will be able to see the difference.
Specifically, suppose:
lib.h
int Add(int a, int b);
lib.cpp
int Add(int a, int b = ...
Array Size (Length) in C#
...nt[,] b = new int[3, 5];)
b.Rank
will give the number of dimensions (2) and
b.GetLength(dimensionIndex)
will get the length of any given dimension (0-based indexing for the dimensions - so b.GetLength(0) is 3 and b.GetLength(1) is 5).
See System.Array documentation for more info.
As @Lucero ...
Write to UTF-8 file in Python
...e help? I need to append a string (paragraph) to a text file. Do I need to convert that into an integer first before writing?
– Mugen
Apr 2 '18 at 12:40
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Programmatically set left drawable in a TextView
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edited Sep 7 at 21:46
Andrew Orobator
5,50911 gold badge2424 silver badges3434 bronze badges
answered Aug 3 '11 at 19:25
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unsigned int vs. size_t
I notice that modern C and C++ code seems to use size_t instead of int / unsigned int pretty much everywhere - from parameters for C string functions to the STL. I am curious as to the reason for this and the benefits it brings.
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