New answers tagged random
0
votes
Randomize the scalars of an array
RProgN 2, 3 bytes
0Rñ
Explained
0Rñ
0R # Range of numbers 0-n (Implicit input)
ñ # Shuffle, Implicit output.
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- 10.2k
0
votes
Output a random unary string
Volatile, 7 bytes
~(:-.~)
Assumes that the . instruction is present in the interpreter. Prints a random length of ...
- 771
1
vote
Make your code error, but only sometimes!
Volatile, 3 bytes
~~/
~ pushes a random number onto the stack (which may include zero), and ...
- 771
0
votes
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MathGolf, 4 bytes
‼ww╙
Try it online.
Port of @DominicVanEssen's second R answer.
Explanation:
...
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0
votes
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05AB1E, 5 bytes
{.s˜Ω
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Or alternatively, a port of @DominicVanEssen's second R answer is 5 bytes as well:
ΩIΩ‚à
...
- 121k
0
votes
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JavaScript (V8), 53 bytes
a=>Math.max(...a.map(_=>a[a.length*Math.random()|0]))
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Not best now though
- 19.1k
4
votes
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Wolfram Language (Mathematica), 19 bytes
RandomChoice[#->#]&
Try it online! Like other languages, the builtin can use weights, so the input can serve as the ...
- 15.4k
4
votes
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Jelly, 3 bytes
X»X
Attempt This Online!
Distribution over 1000 runs: Attempt This Online!
Uses Dominic van Essen's insight: pick a random element (...
- 23.2k
4
votes
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Raku, 13 bytes
*.roll(2).max
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Picks two elements independently and returns the max of the two.
- 47k
3
votes
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Jelly, 4 bytes
ṢxJX
A monadic Link that accepts a list of distinct floats and outputs a random one.
Try it online! Or see the results of 10,000 runs.
How?
Weights ...
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7
votes
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Vyxal, 4 bytes
℅?℅∴
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Return the highest of two random picks
...
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3
votes
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Julia, 37 bytes
!l=rand([fill.(sort(l),keys(l))...;])
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sort the list and repeat each element by their index before randomly choosing a number
...
- 6,165
3
votes
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Factor, 35 bytes
[ [ dup <array> ] map-flat random ]
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Create n copies of each n, and select one at random (uniformly).
For instance, <...
- 20.9k
5
votes
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Ruby, 32 24 bytes
->l{(l+l).sample(2).max}
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Thanks to Dominic van Essen for -4 bytes and the idea to get to -8.
- 20.8k
14
votes
7
votes
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JavaScript (Node.js), 41 bytes
a=>a.sort()[a.length*Math.random()**.5|0]
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Takes an ...
- 761
11
votes
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Python, 64 bytes (also supports negative numbers)
lambda l:sorted(l)[int(len(l)*random()**.5)]
from random import*
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Explanation
Sort the list, ...
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6
votes
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WolframLanguage, 63 48 bytes
Thanks to att for shaving of 15
Sort[#][[Floor@Log2[Random[](2^Tr[1^#]2-3)+2]]]&
Original answer:
...
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8
votes
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J, 8 bytes
#~{~1?+/
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1?+/ Sum the numbers and then choose a random index between 0 and the sum
...
- 32.5k
1
vote
4
votes
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JavaScript (Node.js), 58 bytes
a=>a.sort((a,b)=>b-a).filter(_=>Math.random()<.5)[0]||a[0]
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Sorts the numbers, filters them randomly, ...
- 639
4
votes
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Charcoal, 10 bytes
ＦＡＦι⊞υιＩ‽υ
Try it online! Link is to verbose version of code. Explanation:
ＦＡ
Loop over the input numbers.
<...
- 163k
25
votes
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Python, 41 bytes
lambda l:choices(l,l)
from random import*
Attempt This Online! or run it 100000 times
Uses the list itself as the weights.
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