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Coding Katas for practicing the refactoring of legacy code
... is this:
Find an old, small, unmaintained open source project on sourceforge
Download it, get it to compile/build/run
Read the documentation, get a feel for the code
Use the techniques in Working Effectively with Legacy Code to get a piece of it under test
Refactor that piece, perhaps fixing bugs...
Given a class, see if instance has method (Ruby)
...=> true
NOTE
In case you are coming to Ruby from another OO language OR you think that method_defined means ONLY methods that you defined explicitly with:
def my_method
end
then read this:
In Ruby, a property (attribute) on your model is basically a method also. So method_defined? will als...
Modular multiplicative inverse function in Python
...
I was having problems with negative numbers using this algorithm. modinv(-3, 11) didn't work. I fixed it by replacing egcd with the implementation on page two of this pdf: anh.cs.luc.edu/331/notes/xgcd.pdf Hope that helps!
– Qaz
Nov 3 '14 at 23...
What is the best way to do GUIs in Clojure?
...
I will humbly suggest Seesaw.
Here's a REPL-based tutorial that assumes no Java or Swing knowledge.
Seesaw's a lot like what @tomjen suggests. Here's "Hello, World":
(use 'seesaw.core)
(-> (frame :title "Hello"
:content "Hello, Seesaw"
:on-close :exit)
p...
Undo changes in entity framework entities
this might be a trivial question but: Since ADO.NET entity framework automatically tracks changes (in generated entities) and therefore keeps the original values, how can I rollback changes made to the entity objects?
...
Check if list of objects contain an object with a certain attribute value
...
As you can easily see from the documentation, the any() function short-circuits an returns True as soon as a match has been found.
any(x.name == "t2" for x in l)
share
|
improve this answe...
The current SynchronizationContext may not be used as a TaskScheduler
...d back on Dispatcher using TaskScheduler.FromSyncronizationContext() . For example:
3 Answers
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How to make a copy of a file in android?
... my head I found the problem was missing permission to write to external storage. now it works fine.
– A S
Feb 16 '12 at 9:51
8
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Difference between DirectCast() and CType() in VB.NET
...as just gotten into VB.NET. I generally use CType (and CInt, CBool, CStr) for casts because it is fewer characters and was the first way of casting which I was exposed to, but I am aware of DirectCast and TryCast as well.
...
Cleaner way to update nested structures
...al and 'mutation' of an immutable data structure. Scalaz provides Zippers for Stream (scalaz.Zipper), and Tree (scalaz.TreeLoc). It turns out that the structure of the zipper is automatically derivable from the original data structure, in a manner that resembles symbolic differentiation of an algebr...