blob: 964182b59b7469a145d3530f163e0dffb84243f9 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
'use strict';
module.exports = function similar_text(first, second, percent) {
// eslint-disable-line camelcase
// discuss at: http://locutus.io/php/similar_text/
// original by: Rafał Kukawski (http://blog.kukawski.pl)
// bugfixed by: Chris McMacken
// bugfixed by: Jarkko Rantavuori original by findings in stackoverflow (http://stackoverflow.com/questions/14136349/how-does-similar-text-work)
// improved by: Markus Padourek (taken from http://www.kevinhq.com/2012/06/php-similartext-function-in-javascript_16.html)
// example 1: similar_text('Hello World!', 'Hello locutus!')
// returns 1: 8
// example 2: similar_text('Hello World!', null)
// returns 2: 0
if (first === null || second === null || typeof first === 'undefined' || typeof second === 'undefined') {
return 0;
}
first += '';
second += '';
var pos1 = 0;
var pos2 = 0;
var max = 0;
var firstLength = first.length;
var secondLength = second.length;
var p;
var q;
var l;
var sum;
for (p = 0; p < firstLength; p++) {
for (q = 0; q < secondLength; q++) {
for (l = 0; p + l < firstLength && q + l < secondLength && first.charAt(p + l) === second.charAt(q + l); l++) {// eslint-disable-line max-len
// @todo: ^-- break up this crazy for loop and put the logic in its body
}
if (l > max) {
max = l;
pos1 = p;
pos2 = q;
}
}
}
sum = max;
if (sum) {
if (pos1 && pos2) {
sum += similar_text(first.substr(0, pos1), second.substr(0, pos2));
}
if (pos1 + max < firstLength && pos2 + max < secondLength) {
sum += similar_text(first.substr(pos1 + max, firstLength - pos1 - max), second.substr(pos2 + max, secondLength - pos2 - max));
}
}
if (!percent) {
return sum;
}
return sum * 200 / (firstLength + secondLength);
};
//# sourceMappingURL=similar_text.js.map
|
