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Move levenshtein() and min3() into Zotero.Utilities

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This commit is contained in:
Dan Stillman 2008-06-23 20:33:57 +00:00
parent 224d51eeb9
commit a1e3f8aefd
2 changed files with 39 additions and 30 deletions
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32
chrome/content/zotero/xpcom/db.js
View File

@ -956,40 +956,12 @@ Zotero.DBConnection.prototype._getDBConnection = function () {
// Implements mozIStorageFunction
// TODO: move somewhere else
var lev = {
min3: function (a, b, c) {
var min;
min = a;
if (b < min)
min = b;
if (c < min)
min = c;
return min;
},
ZU: new Zotero.Utilities,
onFunctionCall: function (arg) {
var a = arg.getUTF8String(0);
var b = arg.getUTF8String(1);
var arr = new Array(a.length+1);
var i, j, cost;
for(i=0; i<=a.length; i++)
arr[i] = new Array(b.length);
for (i = 0; i <= a.length; i++) {
arr[i][0] = i;
}
for (j = 0; j <= b.length; j++) {
arr[0][j] = j;
}
for (i = 1; i <= a.length; i++) {
for (j = 1; j <= b.length; j++) {
cost = (a[i-1] == b[j-1])? 0 : 1;
arr[i][j] = this.min3(arr[i-1][j] + 1, arr[i][j-1] + 1, arr[i-1][j-1] + cost);
}
}
return arr[a.length][b.length];
return this.ZU.levenshtein(a, b);
}
};

37
chrome/content/zotero/xpcom/utilities.js
View File

@ -251,6 +251,43 @@ Zotero.Utilities.prototype.parseMarkup = function(str) {
}
Zotero.Utilities.prototype.min3 = function (a, b, c) {
var min;
min = a;
if (b < min) {
min = b;
}
if (c < min) {
min = c;
}
return min;
}
Zotero.Utilities.prototype.levenshtein = function (a, b) {
var arr = new Array(a.length+1);
var i, j, cost;
for(i=0; i<=a.length; i++)
arr[i] = new Array(b.length);
for (i = 0; i <= a.length; i++) {
arr[i][0] = i;
}
for (j = 0; j <= b.length; j++) {
arr[0][j] = j;
}
for (i = 1; i <= a.length; i++) {
for (j = 1; j <= b.length; j++) {
cost = (a[i-1] == b[j-1])? 0 : 1;
arr[i][j] = this.min3(arr[i-1][j] + 1, arr[i][j-1] + 1, arr[i-1][j-1] + cost);
}
}
return arr[a.length][b.length];
}
/*
* Test if a string is an integer
*/