Not logged in.  Login/Logout/Register | List snippets | | Create snippet | Upload image | Upload data

38
LINES

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

JavaX fragment (include)

1  
static int levenIC(S s, S t) {
2  
  // degenerate cases
3  
  if (eqic(s, t)) ret 0;
4  
  int ls = l(s), lt = l(t);
5  
  if (ls == 0) ret lt;
6  
  if (lt == 0) ret ls;
7  
8  
  // create two work vectors of integer distances
9  
  int[] v0 = new int[lt + 1];
10  
  int[] v1 = new int[lt + 1];
11  
12  
  // initialize v0 (the previous row of distances)
13  
  // this row is A[0][i]: edit distance for an empty s
14  
  // the distance is just the number of characters to delete from t
15  
  for (int i = 0; i < v0.length; i++) v0[i] = i;
16  
17  
  for (int i = 0; i < ls; i++) {
18  
      // calculate v1 (current row distances) from the previous row v0
19  
20  
      // first element of v1 is A[i+1][0]
21  
      //   edit distance is delete (i+1) chars from s to match empty t
22  
      v1[0] = i + 1;
23  
24  
      // use formula to fill in the rest of the row
25  
      for (int j = 0; j < lt; j++) {
26  
          int cost = equalsIgnoreCase(s.charAt(i), t.charAt(j)) ? 0 : 1;
27  
          v1[j + 1] = Math.min(Math.min(
28  
            v1[j] + 1,      // delete
29  
            v0[j + 1] + 1), // insert
30  
            v0[j] + cost);  // edit
31  
      }
32  
33  
      // swap arrays
34  
      int[] v = v1; v1 = v0; v0 = v;
35  
  }
36  
37  
  return v0[lt];
38  
}

Author comment

Began life as a copy of #1000388

download  show line numbers  debug dex  old transpilations   

Travelled to 9 computer(s): bhatertpkbcr, cfunsshuasjs, mqqgnosmbjvj, pyentgdyhuwx, pzhvpgtvlbxg, tvejysmllsmz, vouqrxazstgt, whxojlpjdney, xrpafgyirdlv

No comments. add comment

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: 331 / 381
Version history: 8 change(s)
Referenced in: [show references]