To create a function for calculating the distance between two strings in Delphi, you can use the Levenshtein distance algorithm. This is a measure of the difference between two strings, where the distance is the minimum number of single-character edits (insertions, deletions, or substitutions) required to transform one string into the other.
Here is an example of how you could implement this function in Delphi:
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function LevenshteinDistance(const s, t: string): Integer; var i, j: Integer; d: array of array of Integer; begin SetLength(d, Length(s) + 1, Length(t) + 1); for i := 0 to Length(s) do d[i, 0] := i; for j := 0 to Length(t) do d[0, j] := j; for i := 1 to Length(s) do for j := 1 to Length(t) do begin if s[i] = t[j] then d[i, j] := d[i – 1, j – 1] else d[i, j] := Min(Min(d[i – 1, j] + 1, d[i, j – 1] + 1), d[i – 1, j – 1] + 1); end; Result := d[Length(s), Length(t)]; end; |
This function takes two strings as parameters (
s and t) and returns an integer representing the Levenshtein distance between them. To use this function, you can call it and pass in the two strings that you want to compare, like this:|
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distance := LevenshteinDistance(‘string1’, ‘string2’); |
The resulting
distance variable will contain the Levenshtein distance between the two strings.
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