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NSString property: copy or retain?
Let's say I have a class called SomeClass with a string property name:
10 Answers
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What is the difference between a map and a dictionary?
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it's also somewhat confusingly called "Object" in JSON (for historical reasons related to JavaScript)
– Aprillion
Oct 9 '15 at 13:17
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Navigation bar show/hide
...an app with a navigation bar consisting of 2 bar buttons. I would like to hide and show this navigation bar when a user double taps the screen.
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usr/bin/ld: cannot find -l
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Now that's what I call a perfect answer! Thanks a lot. It saved a lot of time. Just to add to help someone like me. It can be used to debug path related issues as well. Make sure you check the path with -L<path to directory> with command...
Android studio: new project vs new module
Android Studio uses the concept of modules , whereas other IDEs like Eclipse use projects .
However AS File menu has the option to create a New Module as well as a new Project .
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How to write very long string that conforms with PEP8 and prevent E501
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Also, because neighboring string constants are automatically concatenated, you can code it like this too:
s = ("this is my really, really, really, really, really, really, "
"really long string that I'd like to shorten.")
Note no plus sign, and I added the extra comma an...
Time complexity of Euclid's Algorithm
... is O(lg[4/3](A+B))
S is O(lg(A+B))
S is O(lg(A*B)) //because A*B asymptotically greater than A+B
S is O(lg(A)+lg(B))
//Input size N is lg(A) + lg(B)
S is O(N)
So the number of iterations is linear in the number of input digits. For numbers that fit into cpu registers, it's reasonable to model the...
Iteration over std::vector: unsigned vs signed index variable
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A call to vector<T>::size() returns a value of type std::vector<T>::size_type, not int, unsigned int or otherwise.
Also generally iteration over a container in C++ is done using iterators, like this.
std::vector&l...
Submit jQuery UI dialog on
...ened, which means if the dialog is opened twice, the event handler will be called twice.
– Elezar
Apr 29 '14 at 23:32
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How to convert a Drawable to a Bitmap?
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URL url_value = new URL(name);
ImageView profile = (ImageView)v.findViewById(R.id.vdo_icon);
if (profile != null) {
Bitmap mIcon1 =
BitmapFactory.decodeStream(url_value.openConnection().getInputStream());
profile.setImageBitmap(mIcon1);
}
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