JavaScript: Hide email addresses to protect from unauthorized user

Last update on May 30 2022 09:59:29 (UTC/GMT +8 hours)

JavaScript String: Exercise-6 with Solution

Write a JavaScript function to hide email addresses to protect from unauthorized user.

Test Data:
console.log(protect_email("[email protected]"));
"[email protected]"

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Hide email addresses to protect from unauthorised user</title>
</head>
<body>
</body>
</html>

JavaScript Code:

protect_email = function (user_email) {
    var avg, splitted, part1, part2;
    splitted = user_email.split("@");
    part1 = splitted[0];
    avg = part1.length / 2;
    part1 = part1.substring(0, (part1.length - avg));
    part2 = splitted[1];
    return part1 + "[email protected]" + part2;
};

console.log(protect_email("[email protected]"));

Sample Output:

[email protected]

Flowchart:

Live Demo:

See the Pen JavaScript Hide email addresses to protect from unauthorized user - string-ex-6 by w3resource (@w3resource) on CodePen.

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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