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What is the difference between Strategy pattern and Dependency Injection?
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DI and Strategy work in the same way, but Strategy is used for more fine-grained and short-lived dependencies.
When an object is configured with a "fixed" Strategy, for example when the object is constructed, the distinction between Strategy a...
Aligning text and image on UIButton with imageEdgeInsets and titleEdgeInsets
I would like to place an icon left of the two lines of text such that there's about 2-3 pixels of space between the image and the start of text. The control itself is Center aligned horizontally (set through Interface Builder)
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How to duplicate virtualenv
I have an existing virtualenv with a lot of packages but an old version of Django.
6 Answers
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How to get elements with multiple classes
... edited Jun 6 '19 at 1:11
Mark
56577 silver badges1111 bronze badges
answered Aug 25 '11 at 2:47
JoeJoe
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Change old commit message on Git
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It says:
When you save and exit the editor, it will rewind you back to that last commit in that list and drop you on the command line with the following message:
$ git rebase -i HEAD~3
Stopped at 7482e0d... updated the gemspec to hopefully work better
You can amend the commit now, with
It...
What is 'Pattern Matching' in functional languages?
...rn matching is
Why its awesome.
Algebraic data types in a nutshell
ML-like functional languages allow you define simple data types called "disjoint unions" or "algebraic data types". These data structures are simple containers, and can be recursively defined. For example:
type 'a list =
| Ni...
How to print to console when using Qt
I'm using Qt4 and C++ for making some programs in computer graphics. I need to be able to print some variables in my console at run-time, not debugging, but cout doesn't seem to work even if I add the libraries. Is there a way to do this?
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When do I need to use AtomicBoolean in Java?
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When multiple threads need to check and change the boolean. For example:
if (!initialized) {
initialize();
initialized = true;
}
This is not thread-safe. You can fix it by using AtomicBoolean:
if (atomicInitialized.compareAndSet(false, true)) {
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How do I check if a file exists in Java?
... edited Sep 7 '18 at 12:40
DVK
117k2828 gold badges194194 silver badges306306 bronze badges
answered Nov 29 '09 at 20:35
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Difference between Lookup() and Dictionary(Of list())
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Two significant differences:
Lookup is immutable. Yay :) (At least, I believe the concrete Lookup class is immutable, and the ILookup interface doesn't provide any mutating members. There could be other mutable implementations, of course.)
When you lookup a...