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Environment variable substitution in sed
...ms hard to diagnose. Potential problems:
You may need double quotes, as in sed 's/xxx/'"$PWD"'/'
$PWD may contain a slash, in which case you need to find a character not contained in $PWD to use as a delimiter.
To nail both issues at once, perhaps
sed 's@xxx@'"$PWD"'@'
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Can overridden methods differ in return type?
... return type is assignable to the return type of the method you are overriding, it's allowed.
For example:
class ShapeBuilder {
...
public Shape build() {
....
}
class CircleBuilder extends ShapeBuilder{
...
@Override
public Circle build() {
....
}
This is specified ...
What is polymorphism, what is it for, and how is it used?
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If you think about the Greek roots of the term, it should become obvious.
Poly = many: polygon = many-sided, polystyrene = many styrenes (a), polyglot = many languages, and so on.
Morph = change or form: morphology = study of biolog...
Correct way to define C++ namespace methods in .cpp file
...h namespace MyClass belongs to and it's just illogical (class function not in the same namespace?)
Version 1 is right because it shows that in the namespace, you are defining the function.
Version 3 is right also because you used the :: scope resolution operator to refer to the MyClass::method () ...
preferredStatusBarStyle isn't called
...sn't called.
Are there any options that I can change to enable it? (I'm using XIBs in my project.)
25 Answers
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Getting the class name from a static method in Java
How can one get the name of the class from a static method in that class. For example
15 Answers
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Declaring variables inside loops, good practice or bad practice?
Question #1: Is declaring a variable inside a loop a good practice or bad practice?
6 Answers
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UITableViewCell, show delete button on swipe
How do I get the delete button to show when swiping on a UITableViewCell ? The event is never raised and the delete button never appears.
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Parse string to DateTime in C#
I have date and time in a string formatted like that one:
8 Answers
8
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Detecting taps on attributed text in a UITextView in iOS
I have a UITextView which displays an NSAttributedString . This string contains words that I'd like to make tappable, such that when they are tapped I get called back so that I can perform an action. I realise that UITextView can detect taps on a URL and call back my delegate, but these aren't ...