Oliver Eyton-Williams 0bd52f8bd1

and change all the challenges to new `md` format.

2020-11-27 10:02:05 -08:00

1.6 KiB

Raw Blame History

id, title, challengeType, forumTopicId

id	title	challengeType	forumTopicId
587d7dab367417b2b2512b6f	Use the some Method to Check that Any Elements in an Array Meet a Criteria	1	301314

--description--

The some method works with arrays to check if any element passes a particular test. It returns a Boolean value - true if any of the values meet the criteria, false if not.

For example, the following code would check if any element in the numbers array is less than 10:

var numbers = [10, 50, 8, 220, 110, 11];
numbers.some(function(currentValue) {
  return currentValue < 10;
});
// Returns true

--instructions--

Use the some method inside the checkPositive function to check if any element in arr is positive. The function should return a Boolean value.

--hints--

Your code should use the some method.

assert(code.match(/\.some/g));

checkPositive([1, 2, 3, -4, 5]) should return true.

assert(checkPositive([1, 2, 3, -4, 5]));

checkPositive([1, 2, 3, 4, 5]) should return true.

assert(checkPositive([1, 2, 3, 4, 5]));

checkPositive([-1, -2, -3, -4, -5]) should return false.

assert(!checkPositive([-1, -2, -3, -4, -5]));

--seed--

--seed-contents--

function checkPositive(arr) {
  // Only change code below this line


  // Only change code above this line
}
checkPositive([1, 2, 3, -4, 5]);

--solutions--

function checkPositive(arr) {
  // Only change code below this line
  return arr.some(elem => elem > 0);
  // Only change code above this line
}
checkPositive([1, 2, 3, -4, 5]);

1.6 KiB Raw Blame History