50 lines
1.8 KiB
JavaScript
50 lines
1.8 KiB
JavaScript
|
const require_isBuffer = require("../../predicate/isBuffer.js");
|
||
|
|
const require_isArrayLike = require("../predicate/isArrayLike.js");
|
||
|
|
const require_isPrototype = require("../_internal/isPrototype.js");
|
||
|
|
const require_isTypedArray = require("../predicate/isTypedArray.js");
|
||
|
|
const require_times = require("../util/times.js");
|
||
|
|
//#region src/compat/object/keys.ts
|
||
|
|
/**
|
||
|
|
* Creates an array of the own enumerable property names of `object`.
|
||
|
|
*
|
||
|
|
* Non-object values are coerced to objects.
|
||
|
|
*
|
||
|
|
* @param {object} object The object to query.
|
||
|
|
* @returns {string[]} Returns the array of property names.
|
||
|
|
* @example
|
||
|
|
* function Foo() {
|
||
|
|
* this.a = 1;
|
||
|
|
* this.b = 2;
|
||
|
|
* }
|
||
|
|
* Foo.prototype.c = 3;
|
||
|
|
* keys(new Foo); // ['a', 'b'] (iteration order is not guaranteed)
|
||
|
|
*
|
||
|
|
* keys('hi'); // ['0', '1']
|
||
|
|
* keys([1, 2, 3]); // ['0', '1', '2']
|
||
|
|
* keys({ a: 1, b: 2 }); // ['a', 'b']
|
||
|
|
*/
|
||
|
|
function keys(object) {
|
||
|
|
if (require_isArrayLike.isArrayLike(object)) return arrayLikeKeys(object);
|
||
|
|
const result = Object.keys(Object(object));
|
||
|
|
if (!require_isPrototype.isPrototype(object)) return result;
|
||
|
|
return result.filter((key) => key !== "constructor");
|
||
|
|
}
|
||
|
|
function arrayLikeKeys(object) {
|
||
|
|
const indices = require_times.times(object.length, (index) => `${index}`);
|
||
|
|
const filteredKeys = new Set(indices);
|
||
|
|
if (require_isBuffer.isBuffer(object)) {
|
||
|
|
filteredKeys.add("offset");
|
||
|
|
filteredKeys.add("parent");
|
||
|
|
}
|
||
|
|
if (require_isTypedArray.isTypedArray(object)) {
|
||
|
|
filteredKeys.add("buffer");
|
||
|
|
filteredKeys.add("byteLength");
|
||
|
|
filteredKeys.add("byteOffset");
|
||
|
|
}
|
||
|
|
const inheritedKeys = Object.keys(object).filter((key) => !filteredKeys.has(key));
|
||
|
|
if (Array.isArray(object)) return [...indices, ...inheritedKeys];
|
||
|
|
return [...indices.filter((index) => Object.hasOwn(object, index)), ...inheritedKeys];
|
||
|
|
}
|
||
|
|
//#endregion
|
||
|
|
exports.keys = keys;
|