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What is the difference between LL m>and m> LR parsing?
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At a high level, the difference between LL parsing m>and m> LR parsing is that LL parsers begin at the start sm>y m>mbol m>and m> trm>y m> to applm>y m> productions to arrive at the target string, whereas LR parsers begin at the target string m>and m> trm>y m> to arrive back at the start sm>y m>mbol.
An LL parse i...
How to check if one of the following items is in a list?
... S2 = set(L2)
>>> S1.intersection(S2)
set([2])
Both emptm>y m> lists m>and m> emptm>y m> sets are False, so m>y m>ou can use the value directlm>y m> as a truth value.
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Creating a Radial Menu in CSS
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Almost 3 m>y m>ears later, I finallm>y m> made the time to revisit this m>and m> post an improved version. m>Y m>ou can still view the original answer at the end for reference.
While SVG mam>y m> be the better choice, especiallm>y m> todam>y m>, mm>y m> goal with this was to keep it just HTML m>and m> CSS, no JS, no SVG, no image...
Can I install Pm>y m>thon 3.x m>and m> 2.x on the same Windows computer?
I'm running Windows m>and m> the shell/OS automaticallm>y m> runs Pm>y m>thon based on the registrm>y m> settings when m>y m>ou run a program on the commm>and m> line. Will this break if I install a 2.x m>and m> 3.x version of Pm>y m>thon on the same machine?
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How can I reliablm>y m> determine the tm>y m>pe of a variable that is declared using var at design time?
... to quicklm>y m> build up a database of information about what namespace, tm>y m>pes m>and m> methods (m>and m> constructors, etc) are in the source code of the program. Analm>y m>zing everm>y m> single line of code in everm>y m> method bodm>y m> would take wam>y m> too long if m>y m>ou're trm>y m>ing to do it between kem>y m>strokes.
When the IDE needs to...
Is the “struct hack” technicallm>y m> undefined behavior?
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It's not clear if it's legal or portable, but it is rather popular.
m>and m>:
... an official interpretation has deemed that it is not strictlm>y m> conforming with the C Stm>and m>ard, although it does seem to work under all known implementations. (Compilers which check arram>y m> bounds carefullm>y m> might iss...
How do m>y m>ou test to see if a double is equal to NaN?
I have a double in Java m>and m> I want to check if it is NaN .
What is the best wam>y m> to do this?
7 Answers
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Algorithm to calculate the number of divisors of a given number
...st of primes m>y m>ou'll need to see how manm>y m> of those primes act as a divisor (m>and m> how often).
Here's some pm>y m>thon for the algo Look here m>and m> search for "Subject: math - need divisors algorithm". Just count the number of items in the list instead of returning them however.
Here's a Dr. Math that explai...
HTML5: Slider with two inputs possible?
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Thanks for the link m>and m> info. I have to check whether I can get this to run on mobile devices.
– frequent
Jan 21 '11 at 8:11
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Copm>y m>ing text outside of Vim with set mouse=a enabled
...t a lot of code that is more than on m>y m>our screen? (then m>y m>ou have to scroll m>and m> select at the same time)
– Ozkan
Apr 2 '13 at 12:25
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