51 lines
1.5 KiB
JavaScript
51 lines
1.5 KiB
JavaScript
import _curry2 from "./internal/_curry2.js";
|
|
import _has from "./internal/_has.js";
|
|
/**
|
|
* Takes a spec object and a test object; returns true if the test satisfies
|
|
* the spec. Each of the spec's own properties must be a predicate function.
|
|
* Each predicate is applied to the value of the corresponding property of the
|
|
* test object. `where` returns true if all the predicates return true, false
|
|
* otherwise.
|
|
*
|
|
* `where` is well suited to declaratively expressing constraints for other
|
|
* functions such as [`filter`](#filter) and [`find`](#find).
|
|
*
|
|
* @func
|
|
* @memberOf R
|
|
* @since v0.1.1
|
|
* @category Object
|
|
* @sig {String: (* -> Boolean)} -> {String: *} -> Boolean
|
|
* @param {Object} spec
|
|
* @param {Object} testObj
|
|
* @return {Boolean}
|
|
* @see R.propSatisfies, R.whereEq
|
|
* @example
|
|
*
|
|
* // pred :: Object -> Boolean
|
|
* const pred = R.where({
|
|
* a: R.equals('foo'),
|
|
* b: R.complement(R.equals('bar')),
|
|
* x: R.gt(R.__, 10),
|
|
* y: R.lt(R.__, 20)
|
|
* });
|
|
*
|
|
* pred({a: 'foo', b: 'xxx', x: 11, y: 19}); //=> true
|
|
* pred({a: 'xxx', b: 'xxx', x: 11, y: 19}); //=> false
|
|
* pred({a: 'foo', b: 'bar', x: 11, y: 19}); //=> false
|
|
* pred({a: 'foo', b: 'xxx', x: 10, y: 19}); //=> false
|
|
* pred({a: 'foo', b: 'xxx', x: 11, y: 20}); //=> false
|
|
*/
|
|
|
|
var where =
|
|
/*#__PURE__*/
|
|
_curry2(function where(spec, testObj) {
|
|
for (var prop in spec) {
|
|
if (_has(prop, spec) && !spec[prop](testObj[prop])) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
});
|
|
|
|
export default where; |