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How do you validate a URL with a regular expression in Python?

I'm building an app on Google App Engine. I'm incredibly new to Python and have been beating my head against the following problem for the past 3 days. ...
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Dynamically update values of a chartjs chart

I created an basic bar chart using chartjs and it works fine. Now I want to update the values on a time based interval. My problem is that after I created the chart, I do not know how to update its values correctly... ...
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What does ||= (or-equals) mean in Ruby?

What does the following code mean in Ruby? 23 Answers 23 ...
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Why doesn't GCC optimize a*a*a*a*a*a to (a*a*a)*(a*a*a)?

I am doing some numerical optimization on a scientific application. One thing I noticed is that GCC will optimize the call pow(a,2) by compiling it into a*a , but the call pow(a,6) is not optimized and will actually call the library function pow , which greatly slows down the performance. (In ...
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Lodash - difference between .extend() / .assign() and .merge()

In the Lodash library, can someone provide a better explanation of merge and extend / assign . 5 Answers ...
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How to test valid UUID/GUID?

How to check if variable contains valid UUID/GUID identifier? 12 Answers 12 ...
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RegEx for matching UK Postcodes

I'm after a regex that will validate a full complex UK postcode only within an input string. All of the uncommon postcode forms must be covered as well as the usual. For instance: ...
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fastest MD5 Implementation in JavaScript

There are many MD5 JavaScript implementations out there. Does anybody know which one is the most advanced, most bugfixed and fastest? ...
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How do the post increment (i++) and pre increment (++i) operators work in Java?

Can you explain to me the output of this Java code? 14 Answers 14 ...
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What is a regular expression which will match a valid domain name without a subdomain?

I need to validate a domain name: 20 Answers 20 ...