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What is a Context Free Grammar?
...to me what a context free grammar is? After looking at the Wikipedia entry and then the Wikipedia entry on formal grammar, I am left utterly and totally befuddled. Would someone be so kind as to explain what these things are?
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How to get started with Windows 7 gadgets
...to make one. But where do I start? I have tried to search around on google and msdn, but I haven't managed to find anything useful. Either very, very old stuff (Vista beta stuff), already made gadgets or differences between gadgets in Vista and Seven. But that doesn't help me, since I don't have a c...
Why must jUnit's fixtureSetup be static?
I marked a method with jUnit's @BeforeClass annotation, and got this exception saying it must be static. What's the rationale? This forces all my init to be on static fields, for no good reason as far as I see.
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How to customize an end time for a YouTube video?
... to return a Flash/SWF stream... Which works fine for me on Chrome/Windows and IE, but not on Firefox.
– Kai Carver
Sep 16 '14 at 11:03
3
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Django development IDE [closed]
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I use Eclipse and a plain vanilla PyDev. There isn't any specific Django functionality. The best I came up with was setting up a run profile to run the development web server.
If you add the web tools project (WTP), you'll get syntax high...
List directory tree structure in python?
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Similar to answers above, but for python3, arguably readable and arguably extensible:
from pathlib import Path
class DisplayablePath(object):
display_filename_prefix_middle = '├──'
display_filename_prefix_last = '└──'
display_parent_prefix_middle = ' '
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Excel “External table is not in the expected format.”
...xcel 2007 file with a connection string that uses: Microsoft.Jet.OLEDB.4.0 and Extended Properties=Excel 8.0
Using the following connection string seems to fix most problems.
public static string path = @"C:\src\RedirectApplication\RedirectApplication\301s.xlsx";
public static string connStr = "Pr...
How do I define a method which takes a lambda as a parameter in Java 8?
In Java 8, methods can be created as Lambda expressions and can be passed by reference (with a little work under the hood). There are plenty of examples online with lambdas being created and used with methods, but no examples of how to make a method taking a lambda as a parameter. What is the syntax...
In Matlab, when is it optimal to use bsxfun?
...ng
Using bsxfun, like using accumarray, makes me feel good about my understanding of Matlab.
bsxfun will replicate the input arrays along their "singleton dimensions", i.e. the dimensions along which the size of the array is 1, so that they match the size of the corresponding dimension of the othe...
How to check if activity is in foreground or in visible background?
...k that the next activity has started because a system dialogue box pops-up and I only want to finish() ; once the user has selected an option from the dialogue box?
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