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-rw-r--r--node_modules/locutus/php/strings/similar_text.js63
1 files changed, 63 insertions, 0 deletions
diff --git a/node_modules/locutus/php/strings/similar_text.js b/node_modules/locutus/php/strings/similar_text.js
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+'use strict';
+
+module.exports = function similar_text(first, second, percent) {
+ // eslint-disable-line camelcase
+ // discuss at: http://locutus.io/php/similar_text/
+ // original by: RafaƂ 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 \ No newline at end of file