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JavaScript: Test whether an array of integers of length 2 does not contain 1 or a 3

JavaScript Basic: Exercise-78 with Solution

Write a JavaScript program to test whether an array of integers of length 2 does not contain 1 or a 3.

Pictorial Presentation:

JavaScript: Test whether an array of integers of length 2 does not contain 1 or a 3.

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JavaScript program to test whether an array of integers of length 2 does not contain 1 or a 3.</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function is13(nums) {
  if (nums.indexOf(1) == -1 && nums.indexOf(3) == -1){
      return true;
  } else {
      return false;
  }
}

console.log(is13([7, 8]));
console.log(is13([3, 2]));
console.log(is13([0, 1]));

Sample Output:

true
false
false

Flowchart:

Flowchart: JavaScript - Test whether an array of integers of length 2 does not contain 1 or a 3

ES6 Version:

function is13(nums) {
  if (!nums.includes(1) && !nums.includes(3)){
      return true;
  } else {
      return false;
  }
}

console.log(is13([7, 8]));
console.log(is13([3, 2]));
console.log(is13([0, 1]));

Live Demo:

See the Pen JavaScript - Test whether an array of integers of length 2 does not contain 1 or a 3-basic-ex-78 by w3resource (@w3resource) on CodePen.


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JavaScript: Tips of the Day

Converts a string to title case

Example:

const toTitleCase = str =>
  str
    .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
    .map(x => x.charAt(0).toUpperCase() + x.slice(1))
    .join(' ');
console.log(toTitleCase('some_database_field_name')); // 'Some Database Field Name'
console.log(toTitleCase('Some label that needs to be title-cased')); // 'Some Label That Needs To Be Title Cased'
console.log(toTitleCase('some-package-name')); // 'Some Package Name'
console.log(toTitleCase('some-mixed_string with spaces_underscores-and-hyphens')); // 'Some Mixed String With Spaces Underscores And Hyphens'

Output:

"Some Database Field Name"
"Some Label That Needs To Be Title Cased"
"Some Package Name"
"Some Mixed String With Spaces Underscores And Hyphens"