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Difference between Java Enumeration and Iterator
What is the exact difference between these two interfaces? Does Enumeration have benefits over using Iterator ? If anyone could elaborate, a reference article would be appreciated.
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Multiple levels of 'collection.defaultdict' in Python
Thanks to some great folks on SO, I discovered the possibilities offered by collections.defaultdict , notably in readability and speed. I have put them to use with success.
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How to use Bitbucket and GitHub at the same time for one project?
I have one repository which I want to push into Bitbucket and GitHub.
It is vital for my repository to be hosted by both.
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Checking if output of a command contains a certain string in a shell script
I'm writing a shell script, and I'm trying to check if the output of a command contains a certain string. I'm thinking I probably have to use grep, but I'm not sure how. Does anyone know?
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Selectors in Objective-C?
First, I'm not sure I really understand what a selector is. From my understanding, it's the name of a method, and you can assign it to a class of type 'SEL' and then run methods such as respondToSelector to see if the receiver implements that method. Can someone offer up a better explanation?
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Haversine Formula in Python (Bearing and Distance between two GPS points)
I would like to know how to get the distance and bearing between 2 GPS points .
I have researched on the haversine formula.
Someone told me that I could also find the bearing using the same data.
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In Python, how do I use urllib to see if a website is 404 or 200?
How to get the code of the headers through urllib?
4 Answers
4
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Selecting an element in iFrame jQuery
In our application, we parse a web page and load it into another page in an iFrame. All the elements in that loaded page have their tokenid-s. I need to select the elements by those tokenid-s. Means - I click on an element on the main page and select corresponding element in the page in the iFrame. ...
Ruby : How to write a gem? [closed]
I'd like to write a package for Ruby and make it available as a gem.
What are the tools, steps and pitfalls ?
Are there any good tutorials, screencasts, etc., which helped you learning how to do it ?
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How to determine if a record is just created or updated in after_save
The #new_record? function determines if a record has been saved. But it is always false in the after_save hook. Is there a way to determine whether the record is a newly created record or an old one from update?
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