зеркало из https://github.com/github/ruby.git
82 строки
1.8 KiB
Ruby
82 строки
1.8 KiB
Ruby
# The Computer Language Shootout
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# http://shootout.alioth.debian.org/
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# Contributed by Sokolov Yura
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$last = 42.0
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def gen_random (max,im=139968,ia=3877,ic=29573)
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(max * ($last = ($last * ia + ic) % im)) / im
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end
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alu =
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"GGCCGGGCGCGGTGGCTCACGCCTGTAATCCCAGCACTTTGG"+
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"GAGGCCGAGGCGGGCGGATCACCTGAGGTCAGGAGTTCGAGA"+
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"CCAGCCTGGCCAACATGGTGAAACCCCGTCTCTACTAAAAAT"+
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"ACAAAAATTAGCCGGGCGTGGTGGCGCGCGCCTGTAATCCCA"+
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"GCTACTCGGGAGGCTGAGGCAGGAGAATCGCTTGAACCCGGG"+
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"AGGCGGAGGTTGCAGTGAGCCGAGATCGCGCCACTGCACTCC"+
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"AGCCTGGGCGACAGAGCGAGACTCCGTCTCAAAAA"
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iub = [
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["a", 0.27],
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["c", 0.12],
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["g", 0.12],
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["t", 0.27],
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["B", 0.02],
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["D", 0.02],
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["H", 0.02],
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["K", 0.02],
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["M", 0.02],
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["N", 0.02],
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["R", 0.02],
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["S", 0.02],
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["V", 0.02],
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["W", 0.02],
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["Y", 0.02],
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]
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homosapiens = [
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["a", 0.3029549426680],
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["c", 0.1979883004921],
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["g", 0.1975473066391],
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["t", 0.3015094502008],
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]
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def make_repeat_fasta(id, desc, src, n)
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puts ">#{id} #{desc}"
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v = nil
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width = 60
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l = src.length
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s = src * ((n / l) + 1)
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s.slice!(n, l)
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puts(s.scan(/.{1,#{width}}/).join("\n"))
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end
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def make_random_fasta(id, desc, table, n)
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puts ">#{id} #{desc}"
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rand, v = nil,nil
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width = 60
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chunk = 1 * width
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prob = 0.0
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table.each{|v| v[1]= (prob += v[1])}
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for i in 1..(n/width)
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puts((1..width).collect{
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rand = gen_random(1.0)
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table.find{|v| v[1]>rand}[0]
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}.join)
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end
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if n%width != 0
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puts((1..(n%width)).collect{
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rand = gen_random(1.0)
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table.find{|v| v[1]>rand}[0]
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}.join)
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end
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end
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n = (ARGV[0] or 250_000).to_i
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make_repeat_fasta('ONE', 'Homo sapiens alu', alu, n*2)
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make_random_fasta('TWO', 'IUB ambiguity codes', iub, n*3)
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make_random_fasta('THREE', 'Homo sapiens frequency', homosapiens, n*5)
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