21 lines
520 B
JavaScript
21 lines
520 B
JavaScript
'use strict';
|
|
|
|
Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
|
|
|
|
const IS_UNSIGNED_INTEGER = /^(?:0|[1-9]\d*)$/;
|
|
function isIndex(value, length = Number.MAX_SAFE_INTEGER) {
|
|
switch (typeof value) {
|
|
case 'number': {
|
|
return Number.isInteger(value) && value >= 0 && value < length;
|
|
}
|
|
case 'symbol': {
|
|
return false;
|
|
}
|
|
case 'string': {
|
|
return IS_UNSIGNED_INTEGER.test(value);
|
|
}
|
|
}
|
|
}
|
|
|
|
exports.isIndex = isIndex;
|