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Get nth character of a string in Swift programming language

...ng a linear loop inside another linear loop means this for loop is accidentally O(n2) — as the length of the string increases, the time this loop takes increases quadratically. Instead of doing that you could use the characters's string collection. – ignaciohugog ...
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How can I safely encode a string in Java to use as a filename?

...m with escape sequences. The reverse of the above encoding should be equally straight-forward to implement. share | improve this answer | follow | ...
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How to remove constraints from my MySQL table?

... Postgres, MSSQL, and Oracle all have alter table .. drop constraint. MySQL is the odd one out, it seems. – Jared Beck Mar 23 '15 at 23:48 ...
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sizeof single struct member in C

... char text[member_size(Parent, text)]; int used; } Child; I'm actually a bit surprised that sizeof((type *)0)->member) is even allowed as a constant expression. Cool stuff. share | impr...
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Multiple constructors in python? [duplicate]

... Now you can do: c = C(fd) # or: c = C.fromfilename('a filename') Notice all those classmethods still go through the same __init__, but using classmethods can be much more convenient than having to remember what combinations of keyword arguments to __init__ work. isinstance is best avoided becaus...
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How to query MongoDB with “like”?

... Actually, it depends. If the query doesn't use an index, and must do a table scan, then it can certainly be expensive. If you're doing a 'starts with' regex query, then that can use an index. Best to run an explain() to see what'...
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How to use ng-repeat without an html element

I need to use ng-repeat (in AngularJS) to list all of the elements in an array. 8 Answers ...
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What are best practices for validating email addresses on iOS 2.0

... ; "]", or "\" Yes, that means +, ', etc are all legit. share | improve this answer | follow | ...
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Get list of all routes defined in the Flask app

... with the @app.route('/...') decorator. Is there a way to get a list of all the routes that have been declared throughout my app? Perhaps there is some method I can call on the app object? ...
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Calculating arithmetic mean (one type of average) in Python

... Why have you called max? – 1 -_- Jul 25 '17 at 6:41 3 ...