JavaScript: Create a new string from a given string, removing the first and last characters of the string if the first or last character are 'P'
JavaScript Basic: Exercise-67 with Solution
Write a JavaScript program to create a new string from a given string, removing the first and last characters of the string if the first or last character are 'P'. Return the original string if the condition is not satisfied.
Pictorial Presentation:
Sample Solution:
HTML Code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JavaScript program to create a new string from a given string, removing the first and last characters of the string if the first or last character are �P</title>
</head>
<body>
</body>
</html>
JavaScript Code:
function nop(str) {
let start_pos = 0;
let end_pos = str.length;
if (str.length > 0 && str.charAt(0) == 'P')
{
start_pos = 1;
}
if (str.length > 1 && str.charAt(str.length - 1) == 'P')
{
end_pos--;
}
return str.substring(start_pos, end_pos);
}
console.log(nop("PythonP"));
console.log(nop("Python"));
console.log(nop("JavaScript"));
Sample Output:
ython ython JavaScript
Flowchart:
ES6 Version:
function nop(str) {
let start_pos = 0;
let end_pos = str.length;
if (str.length > 0 && str.charAt(0) == 'P')
{
start_pos = 1;
}
if (str.length > 1 && str.charAt(str.length - 1) == 'P')
{
end_pos--;
}
return str.substring(start_pos, end_pos);
}
console.log(nop("PythonP"));
console.log(nop("Python"));
console.log(nop("JavaScript"));
Live Demo:
See the Pen JavaScript - removing the first and last characters of the string if the first or last character are P - basic-ex-67 by w3resource (@w3resource) on CodePen.
Contribute your code and comments through Disqus.
Previous: Write a JavaScript program to display the city name if the string begins with "Los" or "New" otherwise return blank.
Next: Write a JavaScript program to create a new string taking the first and last n characters from a given string.
What is the difficulty level of this exercise?
Test your Programming skills with w3resource's quiz.
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
- New Content published on w3resource:
- HTML-CSS Practical: Exercises, Practice, Solution
- Java Regular Expression: Exercises, Practice, Solution
- Scala Programming Exercises, Practice, Solution
- Python Itertools exercises
- Python Numpy exercises
- Python GeoPy Package exercises
- Python Pandas exercises
- Python nltk exercises
- Python BeautifulSoup exercises
- Form Template
- Composer - PHP Package Manager
- PHPUnit - PHP Testing
- Laravel - PHP Framework
- Angular - JavaScript Framework
- Vue - JavaScript Framework
- Jest - JavaScript Testing Framework