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Find the nth occurrence of substring in a string

... Mark's iterative approach would be the usual way, I think. Here's an alternative with string-splitting, which can often be useful for finding-related processes: def findnth(haystack, needle, n): parts= haystack.split(needle, n+1) if len(parts)<=n+1: return -...
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What is a vertical tab?

What was the original historical use of the vertical tab character ( \v in the C language, ASCII 11)? 10 Answers ...
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How to change package name of an Android Application

My keystore is corrupt, therefore the Android Market is requiring me to rename the app and resubmit it. However, whenever I go to edit the package names in Manifest and throughout the files, it gives me tons of errors. ...
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What is the difference between task and thread?

In C# 4.0, we have Task in the System.Threading.Tasks namespace. What is the true difference between Thread and Task . I did some sample program(help taken from MSDN) for my own sake of learning with ...
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ActiveRecord.find(array_of_ids), preserving order

When you do Something.find(array_of_ids) in Rails, the order of the resulting array does not depend on the order of array_of_ids . ...
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SQL Server Text type vs. varchar data type [closed]

I have variable length character data and want to store in SQL Server (2005) database. I want to learn some best practices about how to choose TEXT SQL type or choose VARCHAR SQL type, pros and cons in performance/footprint/function. ...
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How can I sort a dictionary by key?

...en if you sorted the (key,value) pairs, you wouldn't be able to store them in a dict in a way that would preserve the ordering. The easiest way is to use OrderedDict, which remembers the order in which the elements have been inserted: In [1]: import collections In [2]: d = {2:3, 1:89, 4:5, 3:0} ...
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Why does the use of 'new' cause memory leaks?

I learned C# first, and now I'm starting with C++. As I understand, operator new in C++ is not similar to the one in C#. ...
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Operation on every pair of element in a list

Using Python, I'd like to compare every possible pair in a list. 4 Answers 4 ...
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Loop through all the resources in a .resx file

Is there a way to loop through all the resources in a .resx file in C#? 10 Answers 1...