@awesome-fe/translate
Version:
Translation utils
63 lines • 2.22 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.leven = void 0;
var array = [];
var characterCodeCache = [];
function leven(first, second) {
if (first === second) {
return 0;
}
var swap = first;
// Swapping the strings if `a` is longer than `b` so we know which one is the
// shortest & which one is the longest
if (first.length > second.length) {
first = second;
second = swap;
}
var firstLength = first.length;
var secondLength = second.length;
// Performing suffix trimming:
// We can linearly drop suffix common to both strings since they
// don't increase distance at all
// Note: `~-` is the bitwise way to perform a `- 1` operation
while (firstLength > 0 && (first.charCodeAt(~-firstLength) === second.charCodeAt(~-secondLength))) {
firstLength--;
secondLength--;
}
// Performing prefix trimming
// We can linearly drop prefix common to both strings since they
// don't increase distance at all
var start = 0;
while (start < firstLength && (first.charCodeAt(start) === second.charCodeAt(start))) {
start++;
}
firstLength -= start;
secondLength -= start;
if (firstLength === 0) {
return secondLength;
}
var bCharacterCode;
var result;
var temporary;
var temporary2;
var index = 0;
var index2 = 0;
while (index < firstLength) {
characterCodeCache[index] = first.charCodeAt(start + index);
array[index] = ++index;
}
while (index2 < secondLength) {
bCharacterCode = second.charCodeAt(start + index2);
temporary = index2++;
result = index2;
for (index = 0; index < firstLength; index++) {
temporary2 = bCharacterCode === characterCodeCache[index] ? temporary : temporary + 1;
temporary = array[index];
// eslint-disable-next-line no-multi-assign
result = array[index] = temporary > result ? (temporary2 > result ? result + 1 : temporary2) : (temporary2 > temporary ? temporary + 1 : temporary2);
}
}
return result;
}
exports.leven = leven;
//# sourceMappingURL=leven.js.map