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What is the difference between an interface and a class, and why I should use an interface when I ca
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@ZachM. If i am right, The answer means is, he will not instantiate the classes , but other developers will instantiate the classes and pass it as parameter to MyLogClass WriteLog method. So his method can handle any object which implements IMyLogInterface ....
Does free(ptr) where ptr is NULL corrupt memory?
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NO, it means free(ptr) where ptr is null has no side effects. But in any case, every memory allocated using malloc() or calloc() must be released afterwards using free()
– Gregory Pakosz
Dec 2...
Which SQL query is faster? Filter on Join criteria or Where clause?
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SELECT *
FROM TableA a
LEFT JOIN
TableXRef x
ON x.TableAID = a.ID
AND a.ID = 1
LEFT JOIN
TableB b
ON x.TableBID = b.ID
or this:
SELECT *
FROM TableA a
LEFT JOIN
TableXRef x
ON x.TableAID = a.ID
LEFT JOIN
TableB b
ON b.id = x.Ta...
Confirm deletion in modal / dialog using Twitter Bootstrap?
...ant to have delete confirmation for:
<a href="#" data-href="delete.php?id=23" data-toggle="modal" data-target="#confirm-delete">Delete record #23</a>
<button class="btn btn-default" data-href="/delete.php?id=54" data-toggle="modal" data-target="#confirm-delete">
Delete record...
What is the difference between hg forget and hg remove?
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If you use "hg remove b" against a file with "A" status, which means it has been added but not commited, Mercurial will respond:
not removing b: file has been marked for add (use forget to undo)
This response is a very clear explication of the difference between remove and forget....
How to use support FileProvider for sharing content to other apps?
...at.IntentBuilder), and that intent is not openable by external apps in any meaningful way. I've spent literally most of the day on this nonsense until finally finding your answer.
– Violet Giraffe
Jun 18 '19 at 18:27
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Java RegEx meta character (.) and ordinary dot?
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If you want the dot or other characters with a special meaning in regexes to be a normal character, you have to escape it with a backslash. Since regexes in Java are normal Java strings, you need to escape the backslash itself, so you need two backslashes e.g. \\.
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Defining an abstract class without any abstract methods
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Of course.
Declaring a class abstract only means that you don't allow it to be instantiated on its own.
Declaring a method abstract means that subclasses have to provide an implementation for that method.
The two are separate concepts, though obviously you can't hav...
Fixing Sublime Text 2 line endings?
...ine = true
[*.md]
trim_trailing_whitespace = false
The root = true line means that EditorConfig won't look for other .editorconfig files in the upper levels of the directory structure.
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How to make a HTTP request using Ruby on Rails?
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what does the 'req' mean here?
– sixty4bit
Sep 4 '14 at 15:20
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