/
all.js
40 lines (38 loc) · 1.08 KB
/
all.js
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import _curry2 from './internal/_curry2';
import _dispatchable from './internal/_dispatchable';
import _xall from './internal/_xall';
/**
* Returns `true` if all elements of the list match the predicate, `false` if
* there are any that don't.
*
* Dispatches to the `all` method of the second argument, if present.
*
* Acts as a transducer if a transformer is given in list position.
*
* @func
* @memberOf R
* @since v0.1.0
* @category List
* @sig (a -> Boolean) -> [a] -> Boolean
* @param {Function} fn The predicate function.
* @param {Array} list The array to consider.
* @return {Boolean} `true` if the predicate is satisfied by every element, `false`
* otherwise.
* @see R.any, R.none, R.transduce
* @example
*
* const equals3 = R.equals(3);
* R.all(equals3)([3, 3, 3, 3]); //=> true
* R.all(equals3)([3, 3, 1, 3]); //=> false
*/
var all = _curry2(_dispatchable(['all'], _xall, function all(fn, list) {
var idx = 0;
while (idx < list.length) {
if (!fn(list[idx])) {
return false;
}
idx += 1;
}
return true;
}));
export default all;