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What is the difference between float and double?
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528
Huge difference.
As the name implies, a double has 2x the precision of float[1]. In general a d...
How to remove an item for a OR'd enum?
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edited Aug 9 '16 at 20:53
David Sherret
74.1k2222 gold badges149149 silver badges154154 bronze badges
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Is R's apply family more than syntactic sugar?
...ntly different performance:
> fibo <- function(n) {
+ if ( n < 2 ) n
+ else fibo(n-1) + fibo(n-2)
+ }
> system.time(for(i in 0:26) fibo(i))
user system elapsed
7.48 0.00 7.52
> system.time(sapply(0:26, fibo))
user system elapsed
7.50 0.00 7.54
> s...
Is unsigned integer subtraction defined behavior?
...t can be
represented by the resulting type.
(ISO/IEC 9899:1999 (E) §6.2.5/9)
As you can see, (unsigned)0 - (unsigned)1 equals -1 modulo UINT_MAX+1, or in other words, UINT_MAX.
Note that although it does say "A computation involving unsigned operands can never overflow", which might lead ...
John Carmack's Unusual Fast Inverse Square Root (Quake III)
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answered Aug 28 '09 at 21:52
RushyoRushyo
6,85133 gold badges2929 silver badges4242 bronze badges
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Use 'import module' or 'from module import'?
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edited Jan 27 '14 at 22:14
NullUserException
75.1k2424 gold badges194194 silver badges225225 bronze badges
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Modular multiplicative inverse function in Python
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answered Mar 18 '12 at 12:08
Märt BakhoffMärt Bakhoff
1,31111 gold badge88 silver badges22 bronze badges
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How to remove an element from a list by index
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1820
Use del and specify the index of the element you want to delete:
>>> a = [0, 1, 2, 3,...
Should I use multiplication or division?
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25 Answers
25
Active
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How do I copy a hash in Ruby?
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227
The clone method is Ruby's standard, built-in way to do a shallow-copy:
irb(main):003:0> h...