Encode and Decode Strings | String Manipulation

decode(str) {
const result = []
let i = 0
while (i < str.length) {
 const delimeter = str.indexOf('#', i)
 const length = str.substring(i, delimeter)
 const word = str.substring(delimeter + 1, delimeter + parseInt(length) + 1)

result.push(word)
// Move past: length digits + '#' + word
i += length.length + 1 + parseInt(length)  
}
 return result
}

const word = str.substring(delimeter + 1, delimeter + 1 + parseInt(length))

 0123456789  
 4#neet11#prashantbas

i += length.length + 1 + word.length