JavaScript: Check whether a given string contains equal number of p's and t's

Last update on May 30 2022 10:01:55 (UTC/GMT +8 hours)

JavaScript Basic: Exercise-55 with Solution

Write a JavaScript program to check whether a given string contains equal number of p's and t's.

Pictorial Presentation:

JavaScript: Check whether a given string contains equal number of p's and t's

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>check whether a given string contains equal number of p's and t's</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function equal_pt(str)
{ 
  var str_p = str.replace(/[^p]/g, "");

  var str_t = str.replace(/[^t]/g, "");

  var p_num = str_p.length;
  var s_num = str_t.length;

  return p_num === s_num;
         
}
console.log(equal_pt("paatpss"));
console.log(equal_pt("paatps"));

Sample Output:

false
false

Flowchart:

ES6 Version:

function equal_pt(str)
{ 
  const str_p = str.replace(/[^p]/g, "");

  const str_t = str.replace(/[^t]/g, "");

  const p_num = str_p.length;
  const s_num = str_t.length;

  return p_num === s_num;
         
}
console.log(equal_pt("paatpss"));
console.log(equal_pt("paatps"));

Live Demo:

See the Pen JavaScript - Check whether a given string contains equal number of p's and t's - basic-ex-55 by w3resource (@w3resource) on CodePen.

Contribute your code and comments through Disqus.

Previous: Write a JavaScript program to count the number of vowels of a given string.
Next: Write a JavaScript program to divide two positive numbers and return a string with properly formatted commas.

JavaScript: Tips of the Day

How to insert an item into an array at a specific index (JavaScript)?

What you want is the splice function on the native array object.

arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:

var arr = []; arr[0] = "Jani"; arr[1] = "Hege"; arr[2] = "Stale"; arr[3] = "Kai Jim"; arr[4] = "Borge"; console.log(arr.join()); arr.splice(2, 0, "Lene"); console.log(arr.join());

Ref: https://bit.ly/2BXbp04