Sha256: 9afc41f4fc2f023f3ffd03b40550d7ef1da8aded7a264886517c5e0d7896951b
Contents?: true
Size: 1 KB
Versions: 262
Compression:
Stored size: 1 KB
Contents
package dna
import (
"errors"
"strings"
)
const testVersion = 2
// Histogram is a mapping from nucleotide to its count in given DNA
type Histogram map[byte]int
// DNA is a list of nucleotides
type DNA string
const validNucleotides = "ACGT"
// Count counts number of occurrences of given nucleotide in given DNA
func (dna DNA) Count(nucleotide byte) (count int, err error) {
if !strings.Contains(validNucleotides, string(nucleotide)) {
return 0, errors.New("dna: invalid nucleotide " + string(nucleotide))
}
return strings.Count(string(dna), string(nucleotide)), nil
}
// Counts generates a histogram of valid nucleotides in given DNA.
// Returns error if DNA contains invalid nucleotide.
func (dna DNA) Counts() (Histogram, error) {
var total int
h := Histogram{}
for i := range validNucleotides {
nucleotide := validNucleotides[i]
h[nucleotide], _ = dna.Count(nucleotide)
total += h[nucleotide]
}
if total != len(dna) {
return nil, errors.New("dna: contains invalid nucleotide")
}
return h, nil
}
Version data entries
262 entries across 262 versions & 1 rubygems