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deadfish.js
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deadfish.js
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/*
Make the Deadfish swim.
https://www.codewars.com/kata/51e0007c1f9378fa810002a9
Write a simple parser that will parse and run Deadfish.
Deadfish has 4 commands, each 1 character long:
- i increments the value (initially 0)
- d decrements the value
- s squares the value
- o outputs the value into the return array
Invalid characters should be ignored.
deadfish("iiisdoso") => [ 8, 64 ]
*/
function deadfish(data) {
let output = [];
if (data) {
let chars = data.toUpperCase().split('');
let val = 0;
for (let i = 0; i < chars.length; i++) {
if (chars[i] === 'I') {
val = val + 1;
}
if (chars[i] === 'D') {
val = val - 1;
}
if (chars[i] === 'S') {
val = val * val;
}
if (chars[i] === 'O') {
output.push(val);
}
}
}
return output;
}
export default deadfish;