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Length of an integer in Python
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Python 2.* ints take either 4 or 8 bytes (32 or 64 bits), depending on your Python build. sys.maxint (2**31-1 for 32-bit ints, 2**63-1 for 64-bit ints) will tell you which of the two possibilities obtains.
In Python 3, ints (like longs in Python 2) can take arbitrary sizes ...
MySQL: Transactions vs Locking Tables
...heir transactions (take out the $20 you're paying, and the $30 they're screwing you over with), and now both code paths have two different balances: $80 and $70. Depending on which ones finishes last, you'll end up with either of those two balances in your account, instead of the $50 you should have...
Purpose of ESI & EDI registers?
... with what you're trying to do, use that instead in your hand-optimized 16-bit x86 assembly code...
– Alexander
Jul 15 '13 at 11:23
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PHP - Get bool to echo false when false
...eally wanted to argue why (string)FALSE == "" is a good idea based on this bit from PHP's documentation: "A boolean TRUE value is converted to the string "1". Boolean FALSE is converted to "" (the empty string). This allows conversion back and forth between boolean and string values." but I tested i...
Seeking clarification on apparent contradictions regarding weakly typed languages
... of opinion. An assembly language compiler will not allow you to move a 64 bit double from the stack into a 32 bit register; it will allow you to move a 32 bit pointer to a 64 bit double from the stack into a 32 bit register. In that sense the language is "typesafe" -- it imposes a restriction on th...
With arrays, why is it the case that a[5] == 5[a]?
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@Dinah: A is an address, say 0x1230. If a was in 32-bit int array, then a[0] is at 0x1230, a[1] is at 0x1234, a[2] at 0x1238...a[5] at x1244 etc. If we just add 5 to 0x1230, we get 0x1235, which is wrong.
– James Curran
Dec 19 '08 at 17:...
How to use PHP OPCache?
...you will first have to enable it. To do this you would have to do the following.
Add the following line to your php.ini:
zend_extension=/full/path/to/opcache.so (nix)
zend_extension=C:\path\to\php_opcache.dll (win)
Note that when the path contains spaces you should wrap it in quotes:
zend_exten...
Code Golf: Collatz Conjecture
Inspired by http://xkcd.com/710/ here is a code golf for it.
70 Answers
70
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Is there a way to get rid of accents and convert a whole string to regular letters?
...ut if you need to do this with a lot of text, pre-compiling the regex is a win.
– David Conrad
Mar 3 '13 at 21:49
3
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More elegant way of declaring multiple variables at the same time
... is probably true, it doesn't come natural to may so I will have to read a bit and play around until I fully get what you mean specially since dictionaries that is one of my weaknesses in python yet. Thank you very much, I'll be back :)
– Trufa
Mar 31 '11 at 5:...