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What are the differences between a HashMap and a Hashtable in Java?
...re using Hashtable.
Since synchronization is not an issue for you, I'd recommend HashMap. If synchronization becomes an issue, you may also look at ConcurrentHashMap.
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Django: multiple models in one template using forms [closed]
...d and b_valid and c_valid:
a = formA.save()
b = formB.save(commit=False)
c = formC.save(commit=False)
b.foreignkeytoA = a
b.save()
c.foreignkeytoB = b
c.save()
Here are the docs for custom validation.
...
Automatic Preferred Max Layout Width is not available on iOS versions prior to 8.0
...nes set to anything but 1 if your deployment target is set to 7.1. This is completely reproducible with new single-view project.
Steps to Reproduce:
Create a new single-view, objective-c project
Set the Deployment Target to 7.1
Open the project's storyboard
Drop a label onto the provided view co...
How to use phpexcel to read data and insert into database?
...nsert row data array into your database of choice here
}
Anything more becomes very dependent on your database, and how you want the data structured in it
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What's the difference between “git reset” and “git checkout”?
... as the same, in the sense that both bring the project back to a specific commit. However, I feel they can't be exactly the same, as that would be redundant. What is the actual difference between the two? I'm a bit confused, as the svn only has svn co to revert the commit.
...
Should I use 'border: none' or 'border: 0'?
...e legible. We live in a world of very capable CSS post-processors so I'd recommend you use whatever you prefer and then run it through a "compressor". There's no holy war worth fighting here but Webpack→LESS→PostCSS→PurgeCSS is a good 2020 stack.
That all said, if you're hand-writing all your ...
What is Domain Driven Design?
...ow is not, please refer to this much better answer:
https://stackoverflow.com/a/1222488/1240557
OLD ANSWER (not so complete :))
In order to create good software, you have to know what that software
is all about. You cannot create a banking software system unless you
have a good understandi...
How do I protect Python code? [closed]
...
Python, being a byte-code-compiled interpreted language, is very difficult to lock down. Even if you use a exe-packager like py2exe, the layout of the executable is well-known, and the Python byte-codes are well understood.
Usually in cases like thi...
Android: Difference between onInterceptTouchEvent and dispatchTouchEvent?
...method onTouchEvent.
For ViewGroup.dispatchTouchEvent things are way more complicated. It needs to figure out which one of its child views should get the event (by calling child.dispatchTouchEvent). This is basically a hit testing algorithm where you figure out which child view's bounding rectangle...
ASP.NET MVC JsonResult Date Format
...ed to "\/" (even "\/" must be mapped to "\\/").
See http://msdn.microsoft.com/en-us/library/bb299886.aspx#intro_to_json_topic2 for a better explanation (scroll down to "From JavaScript Literals to JSON")
One of the sore points of JSON is the
lack of a date/time literal. Many
people are surp...