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Python (and Python C API): __new__ versus __init__
The question I'm about to ask seems to be a duplicate of Python's use of __new__ and __init__? , but regardless, it's still unclear to me exactly what the practical difference between __new__ and __init__ is.
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How to remove convexity defects in a Sudoku square?
...ge using OpenCV (as in Google goggles etc). And I have completed the task, but at the end I found a little problem for which I came here.
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How to get duplicate items from a list using LINQ? [duplicate]
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var duplicates = lst.GroupBy(s => s)
.SelectMany(grp => grp.Skip(1));
Note that this will return all duplicates, so if you only want to know which items are duplicated in the source list, you could apply Distinct to the resulting sequence ...
Batch file. Delete all files and folders in a directory
I want to have a batch file that will delete all the folders and files in my cache folder for my wireless toolkit.
15 Answe...
How to get a resource id with a known resource name?
I want to access a resource like a String or a Drawable by its name and not its int id.
10 Answers
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if (key in object) or if(object.hasOwnProperty(key)
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Be careful - they won't produce the same result.
in will also return true if key gets found somewhere in the prototype chain, whereas Object.hasOwnProperty (like the name already tells us), will only return true if key is av...
How to search for a string in text files?
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The reason why you always got True has already been given, so I'll just offer another suggestion:
If your file is not too large, you can read it into a string, and just use that (easier and often faster than reading and checking line per line):
with open('example.txt') ...
MySQL foreign key constraints, cascade delete
...e foreign keys to keep the integrity and avoid orphans (I already use innoDB).
3 Answers
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How do I perform an IF…THEN in an SQL SELECT?
...ons of SQL Server.
SELECT CAST(
CASE
WHEN Obsolete = 'N' or InStock = 'Y'
THEN 1
ELSE 0
END AS bit) as Saleable, *
FROM Product
You only need to do the CAST if you want the result as a Boolean value. If you are hap...
Variable declaration in a C# switch statement [duplicate]
Why is it that in a C# switch statement, for a variable used in multiple cases, you only declare it in the first case?
7 An...