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HashMap and int as key
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You can't use a primitive because HashMap use object internally for the key. So you can only use an object that inherits from Object (that is any object).
That is the function put() in HashMap and as you can see it uses Object for K:
public V put(K key, V value) {
if (key == nu...
Django - “no module named django.core.management”
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It sounds like you do not have django installed. You should check the directory produced by this command:
python -c "from distutils.sysconfig import get_python_lib; print get_python_lib()"
To see if you have the django packages in there.
If there's no django fo...
How can I generate a list or array of sequential integers in Java?
...me functionality, in particular implementing Iterable<Integer> which allows foreach implementation in the same way as List<Integer>.
In older versions (somewhere before Guava 14) you could use this:
ImmutableList<Integer> integerList = Ranges.closedOpen(0, 10).asSet(DiscreteDomai...
How to distinguish mouse “click” and “drag”
...dited Jun 26 '19 at 12:45
Rivenfall
80466 silver badges1414 bronze badges
answered May 18 '11 at 9:03
wong2won...
Notepad++ Multi editing
...d select the lines you want. Then type. The text you type is inserted on all of the lines you selected.
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import .css file into .less file
...by the browser at runtime ; with (inline), the CSS file's contents are actually imported into the compiled stylesheet, which is what you want if that file is out of your web root for example. Note that the default behaviour when @importing a .css file is the same as with the (css) flag - read the d...
What's the best way to store a group of constants that my program uses? [closed]
...way to store them? I don't think I want an Enum , because the data is not all the same type, and I want to manually set each value. Should I just store them all in an empty class? Or is there a better way?
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How to discard local changes in an SVN checkout?
...er changes are not required : """Rest of the changes I made, were for basically debugging, and are no longer required.""" :)
– Cédric Julien
Feb 27 '12 at 10:54
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Is there any way to enforce typing on NSArray, NSMutableArray, etc.?
Can I make a NSMutableArray instance where all the elements are of type SomeClass ?
11 Answers
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How do you rotate a two dimensional array?
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One of my favorite SO answers of all time. Very instructive!
– g33kz0r
Apr 4 '13 at 2:49
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