Add Border
Description
Given a rectangular matrix of characters, add a border of asterisks(*) to it.
Example
For
picture = ["abc",
"ded"]
the output should be
addBorder(picture) = ["*****",
"*abc*",
"*ded*",
"*****"]
Input/Output
-
[execution time limit] 4 seconds (js)
-
[input] array.string picture
A non-empty array of non-empty equal-length strings.
Guaranteed constraints:
1 ≤ picture.length ≤ 100,
1 ≤ picture[i].length ≤ 100.
- [output] array.string
The same matrix of characters, framed with a border of asterisks of width 1.
[JavaScript (ES6)] Syntax Tips
1
2
3
4
5
6
// Prints help message to the console
// Returns a string
function helloWorld(name) {
console.log("This prints to the console when you Run Tests");
return "Hello, " + name;
}
Solution
1
2
3
4
5
6
7
function addBorder(picture) {
picture = picture.map(f=>'*'.concat(f,'*'))
var l = picture[0].length;
picture.unshift(Array(l).fill('*').join(''));
picture.push(Array(l).fill('*').join(''))
return picture;
}