91 lines
2 KiB
JavaScript
91 lines
2 KiB
JavaScript
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import _curry1 from "./internal/_curry1.js";
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import _has from "./internal/_has.js";
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import _isArguments from "./internal/_isArguments.js"; // cover IE < 9 keys issues
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var hasEnumBug = !
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/*#__PURE__*/
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{
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toString: null
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}.propertyIsEnumerable('toString');
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var nonEnumerableProps = ['constructor', 'valueOf', 'isPrototypeOf', 'toString', 'propertyIsEnumerable', 'hasOwnProperty', 'toLocaleString']; // Safari bug
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var hasArgsEnumBug =
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/*#__PURE__*/
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function () {
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'use strict';
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return arguments.propertyIsEnumerable('length');
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}();
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var contains = function contains(list, item) {
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var idx = 0;
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while (idx < list.length) {
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if (list[idx] === item) {
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return true;
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}
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idx += 1;
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}
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return false;
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};
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/**
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* Returns a list containing the names of all the enumerable own properties of
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* the supplied object.
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* Note that the order of the output array is not guaranteed to be consistent
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* across different JS platforms.
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*
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* @func
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* @memberOf R
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* @since v0.1.0
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* @category Object
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* @sig {k: v} -> [k]
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* @param {Object} obj The object to extract properties from
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* @return {Array} An array of the object's own properties.
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* @see R.keysIn, R.values
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* @example
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*
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* R.keys({a: 1, b: 2, c: 3}); //=> ['a', 'b', 'c']
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*/
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var keys = typeof Object.keys === 'function' && !hasArgsEnumBug ?
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/*#__PURE__*/
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_curry1(function keys(obj) {
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return Object(obj) !== obj ? [] : Object.keys(obj);
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}) :
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/*#__PURE__*/
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_curry1(function keys(obj) {
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if (Object(obj) !== obj) {
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return [];
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}
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var prop, nIdx;
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var ks = [];
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var checkArgsLength = hasArgsEnumBug && _isArguments(obj);
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for (prop in obj) {
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if (_has(prop, obj) && (!checkArgsLength || prop !== 'length')) {
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ks[ks.length] = prop;
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}
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}
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if (hasEnumBug) {
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nIdx = nonEnumerableProps.length - 1;
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while (nIdx >= 0) {
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prop = nonEnumerableProps[nIdx];
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if (_has(prop, obj) && !contains(ks, prop)) {
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ks[ks.length] = prop;
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}
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nIdx -= 1;
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}
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}
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return ks;
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});
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export default keys;
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