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How to delete items from a dictionary while iterating over it?
...ot modify a dictionary while iterating over it:
>>> mydict = {'one': 1, 'two': 2, 'three': 3, 'four': 4}
>>> for k, v in mydict.iteritems():
... if k == 'two':
... del mydict[k]
...
------------------------------------------------------------
Traceback (most recent cal...
Why are mutable structs “evil”?
...he danger of making a copy of a struct, modifying it, and somehow thinking one is modifying the original (when the fact that one is writing a struct field makes self-apparent the fact that one is only writing one's copy) seems pretty small compared to the danger that someone who holds a class object...
Efficient list of unique strings C#
...
var hash = new HashSet<string>();
var collectionWithDup = new []{"one","one","two","one","two","zero"};
// No need to check for duplicates as the Add method
// will only add it if it doesn't exist already
foreach (var str in collectionWithDup)
hash.Add(str);
...
Set every cell in matrix to 0 if that row or column contains a 0
...esets 1st line/col depending on l and c.
I doubt strongly that I can be done in 1 pass as squares in the beginning depend on squares in the end. Maybe my 2nd pass can be made more efficient...
import pprint
m = [[1, 0, 1, 1, 0],
[0, 1, 1, 1, 0],
[1, 1, 1, 1, 1],
[1, 0, 1, 1, 1],
...
What is normalized UTF-8 all about?
...ng form. The resulting code points should appear identical to the original ones barring any bugs in the fonts or rendering engine.
When To Use
Because the results appear identical, it is always safe to apply canonical normalization to a string before storing or displaying it, as long as you can tole...
How do I position one image on top of another in HTML?
...
When running the code snippet, the one image is not displaying on top of the other one.
– kojow7
Mar 31 '19 at 4:51
...
Circle drawing with SVG's arc path
...it, not SVG itself. But that is how you make a circle in SVG/XAMLs Arc component.
– Todd Main
Apr 21 '11 at 4:21
Ahhh,...
Select all columns except one in MySQL?
...lect statement to get all of the columns from a certain MySQL table except one. Is there a simple way to do this?
30 Answer...
How to execute XPath one-liners from shell?
...untu and/or CentOS, that has a command-line tool that can execute an XPath one-liner like foo //element@attribute filename.xml or foo //element@attribute < filename.xml and return the results line by line?
...
How many classes should I put in one file? [closed]
I'm used to the Java model where you can have one public class per file. Python doesn't have this restriction, and I'm wondering what's the best practice for organizing classes.
...