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Code Golf: Collatz Conjecture
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x86 assembly, 1337 characters
;
; To assemble and link this program, just run:
;
; >> $ nasm -f elf collatz.asm && gcc -o collatz collatz.o
;
; You can then enjoy its output by passing a number to it on the comm...
Get underlying NSData from UIImage
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CarolineCaroline
4,81022 gold badges2727 silver badges4545 bronze badges
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Using Mockito's generic “any()” method
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Since Java 8 you can use the argument-less any method and the type argument will get inferred by the compiler:
verify(bar).doStuff(any());
Explanation
The new thing in Java 8 is that the target type of an expression will be used t...
Ruby/Rails: converting a Date to a UNIX timestamp
...xample:
>> Date.new(2009,11,26).to_time
=> Thu Nov 26 00:00:00 -0800 2009
>> Date.new(2009,11,26).to_time.to_i
=> 1259222400
>> Time.at(1259222400)
=> Thu Nov 26 00:00:00 -0800 2009
Note that the intermediate DateTime object is in local time, so the timestamp might be a...
Are tuples more efficient than lists in Python?
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8 Answers
8
Active
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Ruby on Rails Callback, what is difference between :before_save and :before_create?
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Vishal Nagda
9961313 silver badges1818 bronze badges
answered Jun 6 '11 at 8:46
ChowlettChowlett
41.5k1616 gold b...
C++ performance challenge: integer to std::string conversion
...nclude <string>
const char digit_pairs[201] = {
"00010203040506070809"
"10111213141516171819"
"20212223242526272829"
"30313233343536373839"
"40414243444546474849"
"50515253545556575859"
"60616263646566676869"
"70717273747576777879"
"80818283848586878889"
"90919293949596979...
How to sort two lists (which reference each other) in the exact same way
...ps = zip(list1, list2); tups.sort(); zip(*tups)
100000 loops, best of 3: 2.84 us per loop
On the other hand, for larger lists, the one-line version could be faster:
>>> %timeit zip(*sorted(zip(list1, list2)))
100 loops, best of 3: 8.09 ms per loop
>>> %timeit tups = zip(list1, l...
Regex to validate date format dd/mm/yyyy
...to take dd/mm/yyyy, dd-mm-yyyy or dd.mm.yyyy.
^(?:(?:31(\/|-|\.)(?:0?[13578]|1[02]))\1|(?:(?:29|30)(\/|-|\.)(?:0?[13-9]|1[0-2])\2))(?:(?:1[6-9]|[2-9]\d)?\d{2})$|^(?:29(\/|-|\.)0?2\3(?:(?:(?:1[6-9]|[2-9]\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00))))$|^(?:0?[1-9]|1\d|2[0...
Expanding tuples into arguments
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Alex MartelliAlex Martelli
724k148148 gold badges11251125 silver badges13241324 bronze badges
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