akwap
Version:
A Ugandan Geolocation flow.
42 lines (41 loc) • 1.23 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.similarity = void 0;
function editDistance(s1, s2) {
s1 = s1.toLowerCase();
s2 = s2.toLowerCase();
var costs = new Array();
for (var i = 0; i <= s1.length; i++) {
var lastValue = i;
for (var j = 0; j <= s2.length; j++) {
if (i === 0)
costs[j] = j;
else {
if (j > 0) {
var newValue = costs[j - 1];
if (s1.charAt(i - 1) !== s2.charAt(j - 1))
newValue = Math.min(Math.min(newValue, lastValue), costs[j]) + 1;
costs[j - 1] = lastValue;
lastValue = newValue;
}
}
}
if (i > 0)
costs[s2.length] = lastValue;
}
return costs[s2.length];
}
function similarity(s1, s2) {
var longer = s1;
var shorter = s2;
if (s1.length < s2.length) {
longer = s2;
shorter = s1;
}
var longerLength = longer.length;
if (longerLength === 0) {
return 1.0;
}
return (longerLength - editDistance(longer, shorter)) / longerLength;
}
exports.similarity = similarity;