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JavaScript: Check whether a string "Script" presents at 5th (index 4) position in a given string

JavaScript Basic: Exercise-30 with Solution

Write a JavaScript program to check whether a string "Script" presents at 5th (index 4) position in a given string, if "Script" presents in the string return the string without "Script" otherwise return the original one.

Pictorial Presentation:

JavaScript: Check whether a string 'Script' presents at 5th (index 4) position in a given string

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JavaScript program to check whether a string “Script” presents at 5th (index 4) position in a given string, if “Script” presents in the string return the string without “Script” otherwise return the original one.</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function check_script(str)
{
  if (str.length < 6) {
    return str;
  }
  let result_str = str;
    
  if (str.substring(10, 4) == 'Script') 
    {
    
   result_str = str.substring(0, 4) + str.substring(10,str.length);
      
  }
  return result_str;
}

console.log(check_script("JavaScript"));
console.log(check_script("CoffeeScript"));

Sample Output:

Java
CoffeeScript

Flowchart:

Flowchart: JavaScript - Check whether a string

ES6 Version:

function check_script(str)
{
  if (str.length < 6) {
    return str;
  }
  let result_str = str;
    
  if (str.substring(10, 4) == 'Script') 
    {
    
   result_str = str.substring(0, 4) + str.substring(10,str.length);
      
  }
  return result_str;
}

console.log(check_script("JavaScript"));
console.log(check_script("CoffeeScript"));

Live Demo:

See the Pen JavaScript: check if a string Script presents at 5th position - ex-30 by w3resource (@w3resource) on CodePen.


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JavaScript: Tips of the Day

Parameter's value

function getItems(fruitList, ...args, favoriteFruit) {
  return [...fruitList, ...args, favoriteFruit]
}

getItems(["banana", "apple"], "pear", "orange")

...args is a rest parameter. The rest parameter's value is an array containing all remaining arguments, and can only be the last parameter! In this example, the rest parameter was the second parameter. This is not possible, and will throw a syntax error.

function getItems(fruitList, favoriteFruit, ...args) {
  return [...fruitList, ...args, favoriteFruit];
}


getItems(['banana', 'apple'], 'pear', 'orange');
The above example works. This returns the array [ 'banana', 'apple', 'orange', 'pear' ].

Ref: https://bit.ly/3jFRBje