I'm trying to create a unique key using the alphabets; I've managed to work it out but I don't really like the approach I took. and I believe someone out there might be able to help me get a better way to do this code. Please let me know if you think of a better idea? or whatever your idea to compare with mine? I think this might be a good way to share knowledge .. Thanks in advance
let string = 'ABE';
let ar1 = ["A", "B", "C", "D", "E"];
string = string.split('');
if (string[2] !=='E') {
for (let i = 0; i < 5; i++) {
if (string[2] === ar1[i]) {
i = i+1;
string[2] = ar1[i]
}
}
string = string.toString().replace(/,/g, '');
console.log("case 1", string);
} else if (string[1] !=='E' && string[2] ==='E') {
string[2] ='A';
for (let i = 0; i < 5; i++) {
if (string[1] === ar1[i]) {
i = i+1;
let newString = ar1[i];
console.log(ar1[i]);
string[1] = newString;
}
}
string = string.toString().replace(/,/g, '');
console.log("case 2", string);
} else if (string[1] ==='E' && string[2] ==='E') {
string[1] ='A';
string[2] ='A';
for (let i = 0; i < 5; i++) {
if (string[0] === ar1[i]) {
i = i+1;
string[0] = ar1[i];
}
}
string = string.toString().replace(/,/g, '');
console.log("case 3", string);
}
Results would be like:
if string = "AAA" Then the result "AAB"
if string = "AAE" Then result will be "ABA"
if string = "AEE" Then result will be "BAA"
You could encode the value to a numerical value, like this palce value
36 6 1
C B A
2 1 0 78
and encode an incremented value with the wanted characters and length.
function decode(value, characters) {
const
values = Object.fromEntries(Array.from(characters, (v, i) => [v, i]));
return value
.split('')
.reduce((s, v) => s * characters.length + values[v], 0);
}
function encode(value, characters, length = 0) {
let result = '';
do {
result = characters[value % characters.length] + result;
value = Math.floor(value / characters.length);
} while (value);
return result.padStart(length, characters[0]);
}
console.log(decode('AAA', 'ABCDEF')); // 0
console.log(encode(0, 'ABCDEF', 3)); // AAA
console.log(encode(1, 'ABCDEF', 3)); // AAB
console.log(decode('CBA', 'ABCDEF')); // 78
console.log(encode(78, 'ABCDEF', 3)); // CBA
console.log(encode(79, 'ABCDEF', 3)); // CBBThis approach rotates each character by a fixed amount (which could be improved upon), ignoring the other characters.
let ar1 = ["A", "B", "C", "D", "E"];
function scramble(str) {
let rotation=3;
let s = str.split('');
for (let i=0; i<s.length; i++) {
s[i]=ar1[(parseInt(s[i],16)+rotation) % ar1.length];
}
return s.toString().replace(/,/g, '');
}