source: node_modules/ramda/es/empty.js

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1import _curry1 from "./internal/_curry1.js";
2import _isArguments from "./internal/_isArguments.js";
3import _isArray from "./internal/_isArray.js";
4import _isObject from "./internal/_isObject.js";
5import _isString from "./internal/_isString.js";
6import _isTypedArray from "./internal/_isTypedArray.js";
7/**
8 * Returns the empty value of its argument's type. Ramda defines the empty
9 * value of Array (`[]`), Object (`{}`), String (`''`),
10 * TypedArray (`Uint8Array []`, `Float32Array []`, etc), and Arguments. Other
11 * types are supported if they define `<Type>.empty`,
12 * `<Type>.prototype.empty` or implement the
13 * [FantasyLand Monoid spec](https://github.com/fantasyland/fantasy-land#monoid).
14 *
15 * Dispatches to the `empty` method of the first argument, if present.
16 *
17 * @func
18 * @memberOf R
19 * @since v0.3.0
20 * @category Function
21 * @sig a -> a
22 * @param {*} x
23 * @return {*}
24 * @example
25 *
26 * R.empty(Just(42)); //=> Nothing()
27 * R.empty([1, 2, 3]); //=> []
28 * R.empty('unicorns'); //=> ''
29 * R.empty({x: 1, y: 2}); //=> {}
30 * R.empty(Uint8Array.from('123')); //=> Uint8Array []
31 */
32
33var empty =
34/*#__PURE__*/
35_curry1(function empty(x) {
36 return x != null && typeof x['fantasy-land/empty'] === 'function' ? x['fantasy-land/empty']() : x != null && x.constructor != null && typeof x.constructor['fantasy-land/empty'] === 'function' ? x.constructor['fantasy-land/empty']() : x != null && typeof x.empty === 'function' ? x.empty() : x != null && x.constructor != null && typeof x.constructor.empty === 'function' ? x.constructor.empty() : _isArray(x) ? [] : _isString(x) ? '' : _isObject(x) ? {} : _isArguments(x) ? function () {
37 return arguments;
38 }() : _isTypedArray(x) ? x.constructor.from('') : void 0 // else
39 ;
40});
41
42export default empty;
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