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Elegant way to invert a map in Scala
...alues are unique, this works:
(Map() ++ origMap.map(_.swap))
On Scala 2.8, however, it's easier:
origMap.map(_.swap)
Being able to do that is part of the reason why Scala 2.8 has a new collection library.
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Java GUI frameworks. What to choose? Swing, SWT, AWT, SwingX, JGoodies, JavaFX, Apache Pivot? [close
...here is currently a bug which prevents some of the examples to work (PIVOT-858) in your browser.
My second impression of Pivot is that it's easy to use. When I ran into a problem, I could usually solve it quickly by looking at an example. I'm missing a reference of all the styles which each compone...
Using a constant NSString as the key for NSUserDefaults
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18
For access from other classes:
.h
extern NSString * const PolygonNumberOfSidesPrefsKey;
.m
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Elegant setup of Python logging in Django
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58
The best way I've found so far is to initialize logging setup in settings.py - nowhere else. You...
Case in Select Statement
...t SQL Reference - CASE page.
http://msdn.microsoft.com/en-us/library/ms181765.aspx
USE AdventureWorks2012;
GO
SELECT ProductNumber, Name, "Price Range" =
CASE
WHEN ListPrice = 0 THEN 'Mfg item - not for resale'
WHEN ListPrice < 50 THEN 'Under $50'
WHEN ListPrice >= 50...
e.printStackTrace equivalent in python
... # will print this message followed by traceback
Output:
ERROR 2007-09-18 23:30:19,913 error 1294 Something awful happened!
Traceback (most recent call last):
File "b.py", line 22, in f
g()
File "b.py", line 14, in g
1/0
ZeroDivisionError: integer division or modulo by zero
(From ht...
How to get current date & time in MySQL?
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edited Jan 26 '18 at 9:35
Yuri
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answere...
Rounding float in Ruby
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182
When displaying, you can use (for example)
>> '%.2f' % 2.3465
=> "2.35"
If you want...
How to securely save username/password (local)?
...t going to verify/validate the entered user name and password, use the Rfc2898DerivedBytes class (also known as Password Based Key Derivation Function 2 or PBKDF2). This is more secure than using encryption like Triple DES or AES because there is no practical way to go from the result of RFC2898Der...
How do I use $rootScope in Angular to store variables?
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