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When should we use intern method of String on String literals
According to String#intern() , intern method is supposed to return the String from the String pool if the String is found in String pool, otherwise a new string object will be added in String pool and the reference of this String is returned.
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unix - head AND tail of file
...u can simply:
(head; tail) < file.txt
And if you need to uses pipes for some reason then like this:
cat file.txt | (head; tail)
Note: will print duplicated lines if number of lines in file.txt is smaller than default lines of head + default lines of tail.
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nosetests is capturing the output of my print statements. How to circumvent this?
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Either:
$ nosetests --nocapture mytest.py
Or:
$ NOSE_NOCAPTURE=1 nosetests mytests.py
(it can also be specified in the nose.cfg file, see nosetests --help)
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Overflow Scroll css is not working in the div
I am looking for CSS/Javascript solution for my HTML page scrolling issue.
10 Answers
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What is the use of ObservableCollection in .net?
...event handler to do some additional processing. This may be changing a UI or performing some other operation.
The code below doesn't really do anything but demonstrates how you'd attach a handler in a class and then use the event args to react in some way to the changes. WPF already has many oper...
How to find all occurrences of a substring?
...There is no simple built-in string function that does what you're looking for, but you could use the more powerful regular expressions:
import re
[m.start() for m in re.finditer('test', 'test test test test')]
#[0, 5, 10, 15]
If you want to find overlapping matches, lookahead will do that:
[m.st...
How do I catch a PHP fatal (`E_ERROR`) error?
I can use set_error_handler() to catch most PHP errors, but it doesn't work for fatal ( E_ERROR ) errors, such as calling a function that doesn't exist. Is there another way to catch these errors?
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Do subclasses inherit private fields?
...ts not there.
However. This is different than the notion of inheritance for a class. As is the case in the java world, where there is a question of semantics the arbiter is the Java Language Specification (currently 3rd edition).
As the JLS states (https://docs.oracle.com/javase/specs/jls/se8/ht...
How do you change a repository description on GitHub?
When you create a repository on GitHub, you can optionally create a description of the repository. Unfortunately, I wrote a description that no longer adequately describes the code in the repo.
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What is the advantage of using forwarding references in range-based for loops?
const auto& would suffice if I want to perform read-only operations. However, I have bumped into
3 Answers
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