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Get PostGIS version
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Since some of the functions depend on other libraries like GEOS and proj4 you might want to get their versions too. Then use:
SELECT PostGIS_full_version();
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Template default arguments
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@OlafDietsche but you can't have a template class and a non-template class with the same name, so the compiler should be able to decide by just looking at what the name is.
– Seth Carnegie
Mar 12 '13 at 23:13
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How can I determine if a String is non-null and not only whitespace in Groovy?
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and what if foo = null ?
– Bertl
Sep 1 at 10:54
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Select a Dictionary with LINQ
I have used the "select" keyword and extension method to return an IEnumerable<T> with LINQ, but I have a need to return a generic Dictionary<T1, T2> and can't figure it out. The example I learned this from used something in a form similar to the following:
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Node.js + Express: Routes vs controller
New to Node.js and Express, I am trying to understand the two seems overlapping concepts, routes vs controller.
2 Answers
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Difference between Destroy and Delete
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ActiveRecord::Persistence.delete
Deletes the record in the database and freezes this instance to reflect that no changes should be made (since they can't be persisted). Returns the frozen instance.
The row is simply removed with an SQL DELETE statement on the record's primary key, and no...
.htaccess mod_rewrite - how to exclude directory from rewrite rule
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@Kelvin: The alternation ($|/) should handle both cases.
– Gumbo
Dec 4 '09 at 21:56
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Fill between two vertical lines in matplotlib
...r than one of the fill between functions. The differences is that axvspan (and axhspan) will fill up the entire y (or x) extent of the plot regardless of how you zoom.
For example, let's use axvspan to highlight the x-region between 8 and 14:
import matplotlib.pyplot as plt
fig, ax = plt.subplots...
How to select first and last TD in a row?
How can you select the first and the last TD in a row?
5 Answers
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How can I merge two hashes without overwritten duplicate keys in Ruby?
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If you have two hashes, options and defaults, and you want to merge defaults into options without overwriting existing keys, what you really want to do is the reverse: merge options into defaults:
options = defaults.merge(options)
Or, if you're using Rai...