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< > BotCompany Repo | #1022301 - levenIC - case-insensitive Levenshtein string distance function in JavaX

JavaX fragment (include)

static int levenIC(S s, S t) {
  // degenerate cases
  if (eqic(s, t)) ret 0;
  int ls = l(s), lt = l(t);
  if (ls == 0) ret lt;
  if (lt == 0) ret ls;

  // create two work vectors of integer distances
  int[] v0 = new int[lt + 1];
  int[] v1 = new int[lt + 1];

  // initialize v0 (the previous row of distances)
  // this row is A[0][i]: edit distance for an empty s
  // the distance is just the number of characters to delete from t
  for (int i = 0; i < v0.length; i++) v0[i] = i;

  for (int i = 0; i < ls; i++) {
      // calculate v1 (current row distances) from the previous row v0

      // first element of v1 is A[i+1][0]
      //   edit distance is delete (i+1) chars from s to match empty t
      v1[0] = i + 1;

      // use formula to fill in the rest of the row
      for (int j = 0; j < lt; j++) {
          int cost = equalsIgnoreCase(s.charAt(i), t.charAt(j)) ? 0 : 1;
          v1[j + 1] = Math.min(Math.min(
            v1[j] + 1,      // delete
            v0[j + 1] + 1), // insert
            v0[j] + cost);  // edit
      }

      // swap arrays
      int[] v = v1; v1 = v0; v0 = v;
  }

  return v0[lt];
}

Author comment

Began life as a copy of #1000388

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Snippet ID: #1022301
Snippet name: levenIC - case-insensitive Levenshtein string distance function in JavaX
Eternal ID of this version: #1022301/9
Text MD5: 73aaa9978fe7fcca6e71ac7168684f55
Author: stefan
Category: javax
Type: JavaX fragment (include)
Public (visible to everyone): Yes
Archived (hidden from active list): No
Created/modified: 2020-04-19 12:19:46
Source code size: 1170 bytes / 38 lines
Pitched / IR pitched: No / No
Views / Downloads: 102 / 136
Version history: 8 change(s)
Referenced in: [show references]

Formerly at http://tinybrain.de/1022301 & http://1022301.tinybrain.de