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Hide Utility Class Constructor : Utility classes should not have a public or default constructor
...our code. Additionally, you can make the class final, so that it can't be em>x m>tended in subclasses, which is a best practice for utility classes. Since you declared only a private constructor, other classes wouldn't be able to em>x m>tend it anyway, but it is still a best practice to mark the class as fina...
How to break out of a loop from inside a switch?
...the implied contract of a while loop.
The while loop declaration should em>x m>plicitly state the only em>x m>it condition.
Implies that it loops forever.
Code within the loop must be read to understand the terminating clause.
Loops that repeat forever prevent the user from terminating the program from w...
“:” (colon) in C struct - what does it mean? [duplicate]
...d uses. Here is a quote from MSDN describing bit fields:
The constant-em>x m>pression specifies the width of the field in bits. The
type-specifier for the declarator must be unsigned int, signed int, or
int, and the constant-em>x m>pression must be a nonnegative integer value.
If the value is zero, ...
Unzipping files in Python
...pfile
with zipfile.ZipFile(path_to_zip_file, 'r') as zip_ref:
zip_ref.em>x m>tractall(directory_to_em>x m>tract_to)
That's pretty much it!
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Where do “pure virtual function call” crashes come from?
...base class version, which in the case of a pure virtual function, doesn't em>x m>ist.
(See live demo here)
class Base
{
public:
Base() { doIt(); } // DON'T DO THIS
virtual void doIt() = 0;
};
void Base::doIt()
{
std::cout<<"Is it fine to call pure virtual function from constructor?...
How to convert a char to a String?
...efficient
// #2
String stringValueOfCharArray = String.valueOf(new char[]{m>x m>});
// #3
String characterToString = Character.toString('c');
// #4
String characterObjectToString = new Character('c').toString();
// #5
// Although this method seems very simple,
// this is less efficient because...
How to clear gradle cache?
...adle cache locates at
On Windows: %USER_HOME%\.gradle/caches/
On Mac/Unim>x m>: ~/.gradle/caches/
You can browse to these directory and manually delete it or run
rm -rf $HOME/.gradle/caches/
on Unim>x m> system. Run this command will also force to download dependencies.
Update 2: Clear the Android b...
Installing rmagick on Ubuntu
...wered Aug 29 '13 at 3:33
Daniel m>X m> MooreDaniel m>X m> Moore
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Using switch statement with a range of value in each case?
...rite a switch statement where each case contains more than one value? For em>x m>ample (though clearly the following code won't work):
...
Postgres NOT in array
...3 != all (recipient_ids)
From the fine manual:
9.21.4. ALL (array)
em>x m>pression operator ALL (array em>x m>pression)
The right-hand side is a parenthesized em>x m>pression, which must yield an array value. The left-hand em>x m>pression is evaluated and compared to each element of the array using the giv...