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Why does this code using random strings print “hello world”?
The following print statement would print "hello world".
Could anyone explain this?
15 Answers
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Remove Fragment Page from ViewPager in Android
...ted by this answer, I found that the solution is to override the getItemId(int position) method of FragmentPagerAdapter to give a new unique ID whenever there has been a change in the expected position of a Fragment.
Source Code:
private class MyPagerAdapter extends FragmentPagerAdapter {
pri...
When is assembly faster than C?
...
Here is a real world example: Fixed point multiplies on old compilers.
These don't only come handy on devices without floating point, they shine when it comes to precision as they give you 32 bits of precision with a predictable error (float only has 23 bit and ...
Sorting a vector of custom objects
...
A simple example using std::sort
struct MyStruct
{
int key;
std::string stringValue;
MyStruct(int k, const std::string& s) : key(k), stringValue(s) {}
};
struct less_than_key
{
inline bool operator() (const MyStruct& struct1, const MyStruct& struct2)...
Inspecting standard container (std::map) contents with gdb
... Note: the std::map functionality in these scripts assumes 32-bit pointer types. For 64-bit machines, replace "+ 4" to "+ 8" everywhere in the file.
– Kyle Simek
May 20 '12 at 20:22
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How to lock orientation during runtime
...nfiguration returns and what setRequestedOrientation wants - they are both int, but they are coming from different constant definitions.
Here's how to lock the current orientation, while allowing 180 degree flips
int currentOrientation = getResources().getConfiguration().orientation;
if (currentOr...
Is String.Format as efficient as StringBuilder
...may no longer apply to later versions.
String.Format uses a StringBuilder internally:
public static string Format(IFormatProvider provider, string format, params object[] args)
{
if ((format == null) || (args == null))
{
throw new ArgumentNullException((format == null) ? "format" :...
Unicode Processing in C++
...n 22.4.1.4 "Class template codecvt" - discusses the codecvt class used for converting between character encodings (including UTF-8, UTF-16 and UTF-32). There is more about Unicode support peppered throughout the document, but these seem to be the most critical sections on the subject.
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How to check if an object is an array?
...ts a list of strings, or a single string. If it's a string, then I want to convert it to an array with just the one item so I can loop over it without fear of an error.
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How to insert a character in a string at a certain position?
I'm getting in an int with a 6 digit value. I want to display it as a String with a decimal point (.) at 2 digits from the end of int . I wanted to use a float but was suggested to use String for a better display output (instead of 1234.5 will be 1234.50 ). Therefore, I need a function t...