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What does the “@” symbol mean in reference to lists in Haskell?
...ny constructor; if you have data Tree a = Tree a [Tree a], then t@(Tree _ kids) gives you access to both the tree and its children.
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How to get one value at a time from a generator function in Python?
...these end up calling a specially named function, next(), which can be overridden by subclassing. In Python 3, however, this function has been renamed to __next__(), to be consistent with other special functions.
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Conditional import of modules in Python
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I've seen this idiom used a lot, so you don't even have to do OS sniffing:
try:
import json
except ImportError:
import simplejson as json
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Notepad++: How to automatically set Language as Xml when load files
...you get the +1 for the screenshot :)
– Thanasis Ioannidis
Dec 11 '13 at 9:05
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How to create a listbox in HTML without allowing multiple selection?
...t5</option>
</select>
To clarify, adding the size attribute did not remove the multiple selection.
The single selection works because you removed the multiple="multiple" attribute.
Adding the size="5" attribute is still a good idea, it means that at least 5 lines must be displayed. S...
Take all my changes on the current branch and move them to a new branch in Git
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@PaulLynch considering those commits (on master) that should be on edge are on master, yes. I have edited the answer.
– VonC
Mar 20 '13 at 6:15
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Ruby/Rails: converting a Date to a UNIX timestamp
...answered Nov 26 '09 at 22:46
David GraysonDavid Grayson
68k2222 gold badges131131 silver badges165165 bronze badges
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What exactly happens when I set LoadUserProfile of IIS pool?
...s now.
This is most likely because the Windows Cryptographic Service Provider was trying to store or load a key for your certificate in the user store, and since a profile was not available, a cryptographic context was not available. Note that the Load User Profile setting only applies to user acc...
How to quit scala 2.11.0 REPL?
... with sys.exit suggested instead, so this works as well:
sys.exit
As a side note, I think they did this so you can distinguish between exiting the scala console in sbt and exiting sbt itself, though I could be wrong.
shar...
Should methods that throw RuntimeException indicate it in method signature?
...them in any way. Such
problems include arithmetic exceptions, such as dividing by zero;
pointer exceptions, such as trying to access an object through a null
reference; and indexing exceptions, such as attempting to access an
array element through an index that is too large or too small.
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