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26 lines
544 B
Go
26 lines
544 B
Go
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package smetrics
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import (
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"fmt"
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)
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// The Hamming distance is the minimum number of substitutions required to change string A into string B. Both strings must have the same size. If the strings have different sizes, the function returns an error.
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func Hamming(a, b string) (int, error) {
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al := len(a)
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bl := len(b)
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if al != bl {
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return -1, fmt.Errorf("strings are not equal (len(a)=%d, len(b)=%d)", al, bl)
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}
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var difference = 0
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for i := range a {
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if a[i] != b[i] {
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difference = difference + 1
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}
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}
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return difference, nil
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}
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