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Difference between one-to-many and many-to-one relationship
...ually add any columns to the table that is the "one". The Customer has no extra columns which describe the relationship with Order. In fact the Customer might also have a one-to-many relationship with ShippingAddress and SalesCall tables and yet have no additional columns added to the Customer tab...
Django in / not in query
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table1.objects.extra(where=["table1.id NOT IN (SELECT table2.key_to_table1 FROM table2 WHERE table2.id = some_parm)"])
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When should assertions stay in production code? [closed]
...ertion fail unacceptable and sloppy development. Developers need to go the extra mile to handle errors gracefully.
– iksnae
Jan 31 '14 at 18:57
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How do I scroll the UIScrollView when the keyboard appears?
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well, you might want to do extra adjustment (reduction) of the content inset bottom per this stackoverflow.com/questions/25704513/… in case the scroller is occupying the whole height of the screen UIEdgeInsetsMake(0.0, 0.0, kbSize.height - ([UIScreen...
How do I hide javascript code in a webpage?
... makes it one step removed from View Source - that's all, but it's a valid extra step.
– jfriend00
Jul 29 '11 at 7:09
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Singleton by Jon Skeet clarification
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Extra points for attempting an answer about a Jon Skeet question in which Jon Skeet has already answered.
– valdetero
May 11 '15 at 19:05
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About Java cloneable
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Cloning invokes an extra-linguistic way of constructing objects - without constructors.
Cloning requires you to treat somehow with CloneNotSupportedException - or to bother client code for treating it.
Benefits are small - you just don't have ...
When and why I should use session_regenerate_id()?
...hen people come to my site and log in I regenerate the session. It adds an extra layer of security that my newly logged in user is less likely to get hijacked.
Any time we add critical data to a session you should consider regenerating the session ID. If you need to harden your application against ...
Why are C character literals ints instead of chars?
...nerating code to get an 'A' into the register may prefer to waste a little extra memory and encode the value as 0 'A' or 'A' 0 - depending on endianness, and also ensuring it is aligned properly (i.e. not at an odd memory address).
My guess is that C's simply carried this level of CPU-centric behav...
Class with single method — best approach?
...ery cheap operation in most languages, so speed is not an issue. Adding an extra line of code to the consumer is a low cost for laying the foundation of a much more maintainable solution in the future. And finally, if you want to avoid creating instances, simply create a singleton wrapper of your cl...