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Strange, unexpected behavior (disappearing/changing values) when using Hash default value, e.g. Hash
...ior applies to any default value that is subsequently mutated (e.g. hashes and strings), not just arrays.
TL;DR: Use Hash.new { |h, k| h[k] = [] } if you want the most idiomatic solution and don’t care why.
What doesn’t work
Why Hash.new([]) doesn’t work
Let’s look more in-depth at why...
Given the lat/long coordinates, how can we find out the city/country?
...ding API provides this service via a HTTP REST API. Note, the API is usage and rate limited, but you can pay for unlimited access.
Try this link to see an example of the output (this is in json, output is also available in XML)
https://maps.googleapis.com/maps/api/geocode/json?latlng=40.714224,-73...
switch / pattern matching idea
I've been looking at F# recently, and while I'm not likely to leap the fence any time soon, it definitely highlights some areas where C# (or library support) could make life easier.
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XML Schema (XSD) validation tool? [closed]
... the best answer is Xerces, as it implements all of XSD, is cross-platform and widely used. I've created a small Java project on github to validate from the command line using the default JRE parser, which is normally Xerces. This can be used on Windows/Mac/Linux.
There is also a C++ version of Xe...
Trigger change() event when setting 's value with val() function
What is the easiest and best way to trigger change event when setting the value of select element.
5 Answers
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How do I select elements of an array given condition?
...e elements in y corresponding to elements in x that are greater than 1 and less than 5.
6 Answers
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Differences between SP initiated SSO and IDP initiated SSO
... anyone explain to me what the main differences between SP initiated SSO and IDP initiated SSO are, including which would be the better solution for implementing single sign on in conjunction with ADFS + OpenAM Federation?
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How to add an extra column to a NumPy array
...
I think a more straightforward solution and faster to boot is to do the following:
import numpy as np
N = 10
a = np.random.rand(N,N)
b = np.zeros((N,N+1))
b[:,:-1] = a
And timings:
In [23]: N = 10
In [24]: a = np.random.rand(N,N)
In [25]: %timeit b = np.hstac...
Converting RGB to grayscale/intensity
... from RGB to grayscale, it is said that specific weights to channels R, G, and B ought to be applied. These weights are: 0.2989, 0.5870, 0.1140.
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How to dynamically insert a tag via jQuery after page load?
...ems getting this to work. I first tried setting my script tags as strings and then using jquery replaceWith() to add them to the document after page load:
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