29 lines
608 B
Nim
Executable file
29 lines
608 B
Nim
Executable file
# compute the edit distance between two strings
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import
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io
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proc editDistance(a, b: string): int =
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var c: seq[int] = []
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var
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n = a.len
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m = b.len
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setLength(c, (n+1)*(m+1))
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for i in 0..n:
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c[i*n] = i # [i,0]
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for j in 0..m:
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c[j] = j # [0,j]
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for i in 1..n:
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for j in 1..m:
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var x = c[(i-1)*n + j]+1
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var y = c[i*n + j-1]+1
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var z: int
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if a[i-1] == b[j-1]:
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z = c[(i-1)*n + j-1]
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else:
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z = c[(i-1)*n + j-1]+1
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c[(i-1)*n + (j-1)] = min(x,min(y,z))
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return c[n*m]
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write(stdout, editDistance("abc", "abd"))
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