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How to implement Android Pull-to-Refresh
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Finally, Google released an official version of the pull-to-refresh library!
It is called SwipeRefreshLayout, inside the support library, and the documentation is here:
Add SwipeRefreshLayout as a parent of view which will be trea...
Officially, what is typename for?
On occasion I've seen some really indecipherable error messages spit out by gcc when using templates... Specifically, I've had problems where seemingly correct declarations were causing very strange compile errors that magically went away by prefixing the typename keyword to the beginning of the...
TypeError: 'NoneType' object is not iterable in Python
What does error TypeError: 'NoneType' object is not iterable mean?
7 Answers
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Computed / calculated / virtual / derived columns in PostgreSQL
Does PostgreSQL support computed / calculated columns, like MS SQL Server? I can't find anything in the docs, but as this feature is included in many other DBMSs I thought I might be missing something.
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What is the difference between window, screen, and document in Javascript?
I see these terms used interchangeably as the global environment for the DOM. What is the difference (if there is one) and when should I use each one?
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window.onload vs
...e between the window.onload event and the onload event of the body tag? when do I use which and how should it be done correctly?
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Unpacking array into separate variables in JavaScript
This is a simple problem, and I've done it before. I just can't remember how, or what exactly it was called.
7 Answers
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How to create a GUID/UUID in Python
...atform independent? I hear there is a method using ActivePython on Windows but it's Windows only because it uses COM. Is there a method using plain Python?
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Why does Java's hashCode() in String use 31 as a multiplier?
Per the Java documentation, the hash code for a String object is computed as:
13 Answers
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How many concurrent AJAX (XmlHttpRequest) requests are allowed in popular browsers?
...x 3, the answer is 6 per domain: as soon as a 7th XmlHttpRequest (on any tab) to the same domain is fired, it is queued until one of the other 6 finish.
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