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Algorithm to detect corners of paper sheet in photo
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edited Feb 27 '16 at 17:35
John_West
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How do I use vi keys in ipython under *nix?
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In case someone's wandering in here recently, IPython 5.0 switched from readline to prompt_too...
What are the differences between the BLOB and TEXT datatypes in MySQL?
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TEXT and CHAR will convert to/from the character set they have associated with time. BLOB and ...
What is the difference between save and export in Docker?
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The short answer is:
save will fetch an image : for a VM or a physical server, that would be...
How can I convert a file pointer ( FILE* fp ) to a file descriptor (int fd)?
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The proper function is int fileno(FILE *stream). It can be found in <stdio.h>, and is a P...
How to copy directories in OS X 10.7.3?
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Is there something special with that directory or are you really just asking how to copy directo...
How to remove a lua table entry by its key?
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.NET 4.0 build issues on CI server
...0 applications compiling on a CI server without installing Visual Studio 2010 on a CI server?
4 Answers
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foldl versus foldr behavior with infinite lists
... so here's a more general overview:
Consider folding a list of n values [x1, x2, x3, x4 ... xn ] with some function f and seed z.
foldl is:
Left associative: f ( ... (f (f (f (f z x1) x2) x3) x4) ...) xn
Tail recursive: It iterates through the list, producing the value afterwards
Lazy: Nothing i...
LINQ - Left Join, Group By, and Count
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from p in context.ParentTable
join c in context.ChildTable on p.ParentId equals c.ChildParentI...