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Why does this Java code compile?
...ce by attempting to compile
int x = (x = 1) + x;
as a field declaration and as a local variable declaration. The former will fail, but the latter will succeed, because of the difference in semantics.
Introduction
First off, the rules for field and local variable initializers are very different....
What optimizations can GHC be expected to perform reliably?
...ut I don't know what they all are, nor how likely they are to be performed and under what circumstances.
3 Answers
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Django auto_now and auto_now_add
...Any field with the auto_now attribute set will also inherit editable=False and therefore will not show up in the admin panel. There has been talk in the past about making the auto_now and auto_now_add arguments go away, and although they still exist, I feel you're better off just using a custom save...
What are your favorite extension methods for C#? (codeplex.com/extensionoverflow)
Let's make a list of answers where you post your excellent and favorite extension methods .
150 Answers
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Best way to make Java's modulus behave like it should with negative numbers?
... of the negative values of a, since (a % b) is a negative value between -b and 0, (a % b + b) is necessarily lower than b and positive. The last modulo is there in case a was positive to begin with, since if a is positive (a % b + b) would become larger than b. Therefore, (a % b + b) % b turns it in...
Tools to selectively Copy HTML+CSS+JS From A Specific Element of DOM [closed]
...he source of websites to see how their markup is built. Tools like Firebug and Chrome Developer Tools make it easy to inspect the code, but if I want to copy a specific section and play around with it locally, it would be a pain to copy all the individual elements and their associated CSS. And proba...
PostgreSQL: Difference between text and varchar (character varying)
What's the difference between the text data type and the character varying ( varchar ) data types?
9 Answers
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Javascript Drag and drop for touch devices [closed]
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You can use the Jquery UI for drag and drop with an additional library that translates mouse events into touch which is what you need, the library I recommend is https://github.com/furf/jquery-ui-touch-punch, with this your drag and drop from Jquery UI should ...
Fast way of finding lines in one file that are not in another?
...ile1 file2
The input files should be sorted for this to work. With bash (and zsh) you can sort in-place with process substitution <( ):
diff --new-line-format="" --unchanged-line-format="" <(sort file1) <(sort file2)
In the above new and unchanged lines are suppressed, so only changed...
How to send data to local clipboard from a remote SSH session
...cting this thread because I've been looking for the same kind of solution, and I've found one that works for me. It's a minor modification to a suggestion from OSX Daily.
In my case, I use Terminal on my local OSX machine to connect to a linux server via SSH. Like the OP, I wanted to be able to tra...