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Database development mistakes made by application developers [closed]

...Specifically, using a natural key will give you the ability to control the order in which data in your table is written to the disk. If you know how your table will be queried, you can index it so concurrently-accessed rows will end-up in the same page. Furthermore, you can enforce data integrity us...
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Getting key with maximum value in dictionary?

... I thought dict is unsorted, couldn't d.keys and d.values theoretically be ordered differently? – Dimath Apr 1 '15 at 13:28 1 ...
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What are deferred objects?

...ynchronous nature leads to a problem when you want to execute things in an order, for example, you want to print something after Y (asynch) is done executing or done fetching data. Here jQuery provide us with Deffered Object. Basically, jQuery has taken care of all boilerplate code that usually we w...
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Fastest exit strategy for a Panic Button in Crisis/Abuse Websites? [closed]

...or weather report with a similar look and feel to your original website in order to avoid suspicion if the abuser got a quick glance at the website. Also make sure the browser's doesn't cache by using the <META HTTP-EQUIV="CACHE-CONTROL" CONTENT="NO-CACHE">tag. Additional Remarks Ideally your...
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CSS Progress Circle [closed]

...ake up the progress bar */ .circle { width: 80px; height: 80px; border: 10px solid green; border-radius: 50px; position: absolute; clip: rect(0px, 50px, 100px, 0px); } /* Using the data attributes for the animation selectors. */ /* Base settings for all animated elements */ di...
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Why don't they teach these things in school? [closed]

...this agreement is based on personal experience and informal reasoning. In order to be a socially accepted "best practice", we need quantitative data which can be very expensive to gather: how much does version control help? How does it help? Unit testing? We can reason about the effectiveness of...
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How to become an OpenCart guru? [closed]

...0); Understanding variable assignment in views from the controller In order to pass values to the view from the controller, you simply need to assign your data to the $this->data variable, which is essentially an array of key => value pairs. As an example $this->data['example_var'] = ...
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A monad is just a monoid in the category of endofunctors, what's the problem?

...;) and (>>=) both provide simultaneous access to the two m values in order to compute the the single return value. The logic used to compute the return value is exactly the same. If it were not for the different shapes of the functions they parameterize (f :: a -> b versus k :: a -> m b...
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How to use ScrollView in Android?

...t the text is more than fits into the screen size. What do I need to do in order to make a ScrollView ? 8 Answers ...
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C++ performance vs. Java/C#

...pertise to get it), you'll have to go unmanaged, but for me, I'll take the order of magnitude advantage I have on the first versions over the 33% I gain if I try 6 times. share ...