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How to center align the cells of a UICollectionView?

I am currently using UICollectionView for the user interface grid, and it works fine. However, I'd like to be enable horizontal scrolling. The grid supports 8 items per page and when the total number of items are, say 4, this is how the items should be arranged with horizontal scroll direction ena...
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Django Forms: if not valid, show form with error message

... @AlexanderSupertramp myForm is an instance of either forms.Form or forms.ModelForm, read about Django Forms – Aamir Adnan Mar 9 '15 at 17:54 ...
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How do I split a string with multiple separators in javascript?

...ith multiple separators in JavaScript? I'm trying to split on both commas and spaces but, AFAIK, JS's split function only supports one separator. ...
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Having a UITextField in a UITableViewCell

I'm trying to do that for a couple of days now, and after reading tons of messages of people trying to do that too, I'm still unable to have a fully working UITextField in some of my UITableViewCells , just like in this example: ...
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What is the difference between a generative and a discriminative algorithm?

Please, help me understand the difference between a generative and a discriminative algorithm, keeping in mind that I am just a beginner. ...
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How to make a in Bootstrap look like a normal link in nav-tabs?

I'm working in (formerly Twitter) Bootstrap 2 and I wanted to style buttons as though they were normal links. Not just any normal links, though; these are going in a <ul class="nav nav-tabs nav-stacked"> container. The markup will end up like this: ...
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Python Requests throwing SSLError

... If you have a self-signed certificate, then download it and set verify to its filename. There is no excuse whatsoever for setting verify=False. verify='/path/to/cert.pem' – Matthias Urlichs Oct 9 '13 at 6:30 ...
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Storing Images in PostgreSQL

... Updating to 2012, when we see that image sizes, and number of images, are growing and growing, in all applications... We need some distinction between "original image" and "processed image", like thumbnail. As Jcoby's answer says, there are two options, then, I recommend: ...
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Unicode (UTF-8) reading and writing to files in Python

I'm having some brain failure in understanding reading and writing text to a file (Python 2.4). 14 Answers ...
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Best way to determine user's locale within browser

I have a website (Flash) localized into a dozen of languages and I want to auto-define a default value depending on the user's browser settings in order to minimize the steps to access the content. ...