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- function every(array, predicate) {
- for (var i = 0; i < array.length; i++) {
- if (!predicate(array[i]))
- return false;
- }
- return true;
- }
- function some(array, predicate) {
- for (var i = 0; i < array.length; i++) {
- if (predicate(array[i]))
- return true;
- }
- return false;
- }
- console.log(every([NaN, NaN, NaN], isNaN));
- // → true
- console.log(every([NaN, NaN, 4], isNaN));
- // → false
- console.log(some([NaN, 3, 4], isNaN));
- // → true
- console.log(some([2, 3, 4], isNaN));
- // → false
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