Add_Border.md

🔷 Add Border 🔷

Challenge description

Given a rectangular matrix of characters, add a border of asterisks(*) to it.

Example

For

picture = ["abc",
           "ded"]

the output should be

solution(picture) = ["*****",
                     "*abc*",
                     "*ded*",
                     "*****"]

Input/Output

• [execution time limit] 3 seconds (java)

• [memory limit] 1 GB

• [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.

[Java] Syntax Tips

## Solutions:

• JS solution

  CodeSignalSolutions/Add_Border/Add_border.js

  Lines 1 to 13 in 6387cc4

  	function solution(array) {
  	let solution = new Array()
  	for (let i = 0; i < array.length; i++)
  	solution [i + 1] = "*" + array[i] + "*"
  	let border = ""
  	for(; border.length < array[0].length; border += "*"){}
  	solution[0] = solution[solution.length] = border += "**"
  	return solution
  	}

  

• Java solution

  CodeSignalSolutions/Add_Border/Add_border.java

  Lines 17 to 28 in 6387cc4

  	static String[] solution(String[] picture){
  	String[] solution = new String[picture.length + 2];
  	for (int i = 0; i < picture.length; i++)
  	solution[i + 1] = "*" + picture[i] + "*";
  	String border = "";
  	for(; border.length() < picture[0].length() + 2; border += '*'){}
  	solution [0] = solution[solution.length - 1] = border;
  	return solution;
  	}