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How to create default value for function argument in Clojure
...iffer in arity. You can use that to supply default values.
(defn string->integer
([s] (string->integer s 10))
([s base] (Integer/parseInt s base)))
Note that assuming false and nil are both considered non-values, (if (nil? base) 10 base) could be shortened to (if base base 10), or fur...
“Auth Failed” error with EGit and GitHub
...ut hopefully it can be useful for someone.
In your Eclipse go to Window >
Preferences > General > Network Connections >
SSH2 (or just type "SSH2" in
preferences window filter box).
In "Key Management" tab press
"Generate RSA Key..." button. Optionally you can add comment
(usually e-mai...
Extracting specific columns in numpy array
...
Just:
>>> m = np.matrix(np.random.random((5, 5)))
>>> m
matrix([[0.91074101, 0.65999332, 0.69774588, 0.007355 , 0.33025395],
[0.11078742, 0.67463754, 0.43158254, 0.95367876, 0.85926405],
[0.9866518...
Is floating point math broken?
..., which means:
Do not do if (x == y) { ... }
Instead do if (abs(x - y) < myToleranceValue) { ... }.
where abs is the absolute value. myToleranceValue needs to be chosen for your particular application - and it will have a lot to do with how much "wiggle room" you are prepared to allow, and w...
How to change highlighted occurrences color in Eclipse's sidebar?
...the text is highlighted with in the editor. It is set by going to
Window > Preferences > General > Editors > Text Editors > Annotations
and changing the Occurrences and Write Occurrences colors.
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Suggestions for debugging print stylesheets?
...now be found by clicking on the "three-dots" menu in the top right corner > More Tools > Rendering Settings > Emulate media > print.
Source: Google DevTools page*
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How to remove unused imports from Eclipse
...
I just found the way. Right click on the desired package then Source -> Organize Imports.
Shortcut keys:
Windows: Ctrl + Shift + O
Mac: Cmd + Shift + O
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...
Convert a timedelta to days, hours and minutes
...datetime objects to seconds. This way the system calculates DST for you.
>>> m13 = datetime(2010, 3, 13, 8, 0, 0) # 2010 March 13 8:00 AM
>>> m14 = datetime(2010, 3, 14, 8, 0, 0) # DST starts on this day, in my time zone
>>> mktime(m14.timetuple()) - mktime(m13.timetupl...
How to check if UILabel is truncated?
I have a UILabel that can be varying lengths depending on whether or not my app is running in portrait or landscape mode on an iPhone or iPad. When the text is too long to show on one line and it truncates I want the user to be able to press it and get a popup of the full text.
...
Preserving signatures of decorated functions
...x*y + 2*z
When executed in Python 3, this would produce the following:
>>> funny_function("3", 4.0, z="5")
22
>>> help(funny_function)
Help on function funny_function in module __main__:
funny_function(x, y, z=3)
Computes x*y + 2*z
Its only drawback is that in Python 2 ho...