The challenge
Your task is to write a function toLeetSpeak that converts a regular english sentence to Leetspeak.
More about LeetSpeak You can read at wiki -> https://en.wikipedia.org/wiki/Leet
Consider only uppercase letters (no lowercase letters, no numbers) and spaces.
For example:
toLeetSpeak("LEET") returns "1337"
In this challenge we use a simple LeetSpeak dialect. Use this alphabet:
{
A : '@',
B : '8',
C : '(',
D : 'D',
E : '3',
F : 'F',
G : '6',
H : '#',
I : '!',
J : 'J',
K : 'K',
L : '1',
M : 'M',
N : 'N',
O : '0',
P : 'P',
Q : 'Q',
R : 'R',
S : '$',
T : '7',
U : 'U',
V : 'V',
W : 'W',
X : 'X',
Y : 'Y',
Z : '2'
}
The solution in Java code
Option 1:
import java.util.*;
class Solution {
static String toLeetSpeak(final String speak) {
StringBuilder sb = new StringBuilder();
Map<Character, Character> m = new HashMap<>()
{{
put('A', '@');
put('B', '8');
put('C', '(');
put('D', 'D');
put('E', '3');
put('F', 'F');
put('G', '6');
put('H', '#');
put('I', '!');
put('J', 'J');
put('K', 'K');
put('L', '1');
put('M', 'M');
put('N', 'N');
put('O', '0');
put('P', 'P');
put('Q', 'Q');
put('R', 'R');
put('S', '$');
put('T', '7');
put('U', 'U');
put('V', 'V');
put('W', 'W');
put('X', 'X');
put('Y', 'Y');
put('Z', '2');
}};
for (Character c : speak.toCharArray()) {
Character a = m.getOrDefault(c, c);
sb.append(a);
}
return sb.toString();
}
}
Option 2:
class Solution {
static String toLeetSpeak(final String speak) {
StringBuilder sb = new StringBuilder(speak.length());
for (char c: speak.toCharArray()) {
switch (c) {
case 'A': sb.append('@'); break;
case 'B': sb.append('8'); break;
case 'C': sb.append('('); break;
case 'E': sb.append('3'); break;
case 'G': sb.append('6'); break;
case 'H': sb.append('#'); break;
case 'I': sb.append('!'); break;
case 'L': sb.append('1'); break;
case 'O': sb.append('0'); break;
case 'S': sb.append('$'); break;
case 'T': sb.append('7'); break;
case 'Z': sb.append('2'); break;
default: sb.append(c); break;
}
}
return sb.toString();
}
}
Option 3:
class Solution {
private static final String LEET = "@8(D3F6#!JK1MN0PQR$7UVWXY2";
static String toLeetSpeak(final String speak) {
String leet = "";
for (final char c : speak.toCharArray())
leet += c>='A' && c<='Z' ? LEET.charAt(c-'A') : c;
return leet;
}
}
Test cases to validate our solution
import org.junit.Test;
import static org.junit.Assert.assertEquals;
public class SolutionTest {
@Test public void testSomething() {
assertEquals("1337", Solution.toLeetSpeak("LEET"));
assertEquals("#3110 W0R1D", Solution.toLeetSpeak("HELLO WORLD"));
assertEquals("10R3M !P$UM D010R $!7 @M37", Solution.toLeetSpeak("LOREM IPSUM DOLOR SIT AMET"));
assertEquals("7#3 QU!(K 8R0WN F0X JUMP$ 0V3R 7#3 1@2Y D06", Solution.toLeetSpeak("THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG"));
}
}
