36 lines
936 B
JavaScript
36 lines
936 B
JavaScript
|
import _curry2 from "./internal/_curry2.js";
|
||
|
|
import _isInteger from "./internal/_isInteger.js";
|
||
|
|
import nth from "./nth.js";
|
||
|
|
/**
|
||
|
|
* Returns a function that when supplied an object returns the indicated
|
||
|
|
* property of that object, if it exists.
|
||
|
|
*
|
||
|
|
* @func
|
||
|
|
* @memberOf R
|
||
|
|
* @since v0.1.0
|
||
|
|
* @category Object
|
||
|
|
* @typedefn Idx = String | Int | Symbol
|
||
|
|
* @sig Idx -> {s: a} -> a | Undefined
|
||
|
|
* @param {String|Number} p The property name or array index
|
||
|
|
* @param {Object} obj The object to query
|
||
|
|
* @return {*} The value at `obj.p`.
|
||
|
|
* @see R.path, R.props, R.pluck, R.project, R.nth
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* R.prop('x', {x: 100}); //=> 100
|
||
|
|
* R.prop('x', {}); //=> undefined
|
||
|
|
* R.prop(0, [100]); //=> 100
|
||
|
|
* R.compose(R.inc, R.prop('x'))({ x: 3 }) //=> 4
|
||
|
|
*/
|
||
|
|
|
||
|
|
var prop =
|
||
|
|
/*#__PURE__*/
|
||
|
|
_curry2(function prop(p, obj) {
|
||
|
|
if (obj == null) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
return _isInteger(p) ? nth(p, obj) : obj[p];
|
||
|
|
});
|
||
|
|
|
||
|
|
export default prop;
|