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List vs tuple, when to use each? [duplicate]
.... Stick with immutable points and create new ones, they're cheap enough. If you are dealing with millions of points, use the Flyweight pattern and keep a cache of recently used points.
– John Cowan
Mar 31 '15 at 13:37
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Multi-line commands in GHCi
...xample, the following is sufficient:
Prelude> let addTwo x y = x + y
If you really want a definition with a type signature, or your definition spans over multiple lines, you can do this in ghci:
Prelude> :{
Prelude| let addTwo :: Int -> Int -> Int
Prelude| addTwo x y = x + y
Pre...
How to insert tab character when expandtab option is on in Vim
...nsert mode, <CTRL-V> inserts a literal copy of your next character.
If you need to do this often, @Dee`Kej suggested (in the comments) setting Shift+Tab to insert a real tab with this mapping:
:inoremap <S-Tab> <C-V><Tab>
Also, as noted by @feedbackloop, on Windows you ma...
How can I make SQL case sensitive string comparison on MySQL?
I have a function that returns five characters with mixed case. If I do a query on this string it will return the value regardless of case.
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What are the differences between Helper and Utility classes?
... it can be stateful or require an instance be created. I would avoid this if possible.
If you can make the name more specific. e.g. if it has sorting methods, make it XSorter
For arrays you can find helper classes like
Array
Arrays
ArrayUtil
ArrayUtils
ArrayHelper
BTW a short hand for a utilit...
Get all git commits since last tag
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git log <yourlasttag>..HEAD ?
If you want them like in your example, on the one line with commit id + message, then
git log <yourlasttag>..HEAD --oneline
and in case you don't know your latest tag or want this to be dynamic, on windows you could d...
How do I get list of methods in a Python class?
...erate through the methods in a class, or handle class or instance objects differently based on the methods present. How do I get a list of class methods?
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Convert a RGB Color Value to a Hexadecimal String
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String hex = String.format("#%02x%02x%02x", r, g, b);
Use capital X's if you want your resulting hex-digits to be capitalized (#FFFFFF vs. #ffffff).
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Android: how to make keyboard enter button say “Search” and handle its click?
...boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
if (actionId == EditorInfo.IME_ACTION_SEARCH) {
performSearch();
return true;
}
return false;
}
});
shar...
Compare two objects in Java with possible null values
...ts - making it more generic? And then it is the same as what you will get if you move to Java 7.
– Tom
Nov 7 '13 at 18:31
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