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What algorithms compute directions from point A to point B on a map?
...ctions of the more detailed layers, expanding as necessary. Obviously this description leaves out a lot of detail, but you get the idea.
With modifications along those lines, you can do even cross-country routing in a very reasonable timeframe.
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emacs/elisp: What is the hash (pound, number sign, octothorp) symbol used for?
...ith the left angle bracket (<) to indicate that the object printed is a description (but cannot be read). For example:
#<buffer foo.txt>
It is also used in constructs by the reader to represent circular structures. See the docs for Read Syntax for Circular Objects.
And then you have i...
What is the best way to remove accents (normalize) in a Python unicode string?
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This looks elegant in harnessing the semantic descriptions of characters that are available. Do we really need the unicode function call in there with python 3 though? I think a tighter regex in place of the find would avoid all the trouble mentioned in the comment above...
How to evaluate a math expression given in string form?
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I try to give a description of what I understand from the code written by Boann, and examples described wiki.The logic of this algoritm starting from rules of operation orders. 1. operator sign | variable evaluation | function call | parent...
Adding information to an exception?
...ure that there is a (comma,) behind the one element.
Turning a totally nondescript TypeError into a nice message with hints towards a solution without messing up the original Exception.
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Saving grid.arrange() plot to file
...omeone describing the exact problem I have, I have quoted from the problem description from link :
6 Answers
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Nested attributes unpermitted parameters
... white-list all nested parameters.
params.require(:widget).permit(:name, :description).tap do |whitelisted|
whitelisted[:position] = params[:widget][:position]
whitelisted[:properties] = params[:widget][:properties]
end
This method has advantage over other solutions. It allows to permit deep-...
What's the best way to validate an XML file against an XSD file?
...01/XMLSchema which defines XSDs. The above code validates a WAR deployment descriptor against the URL http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd but you could just as easily validate against a local file.
You should not use the DOMParser to validate a document (unless your goal is to create a ...
Which are more performant, CTE or temporary tables?
...a CTE "can be thought of as temporary result set" this is a purely logical description. More often than not it is not materlialized in its own right.
What is a temporary table?
This is a collection of rows stored on data pages in tempdb. The data pages may reside partially or entirely in memory. A...
Can an array be top-level JSON-text?
... @Matthew - Thanks for that, I was getting horribly confused. The json.org description doesn't mention the more restrictive concept of "json-text" at all, and the RFC's kind of vague about its significance.
– mrec
Feb 15 '13 at 17:46
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