freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-every-method-to-check-that-every-element-in-an-array-meets-a-criteria.md

id, title, challengeType, forumTopicId, dashedName

id	title	challengeType	forumTopicId	dashedName
587d7dab367417b2b2512b6e	Use the every Method to Check that Every Element in an Array Meets a Criteria	1	301312	use-the-every-method-to-check-that-every-element-in-an-array-meets-a-criteria

--description--

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

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

var numbers = [1, 5, 8, 0, 10, 11];
numbers.every(function(currentValue) {
  return currentValue < 10;
});

The every method would return false here.

--instructions--

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

--hints--

Your code should use the every method.

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

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

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

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

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

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

assert.isFalse(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.every(num => num > 0);
  // Only change code above this line
}
checkPositive([1, 2, 3, -4, 5]);