The power of the string is the maximum length of a non−empty substring that contains only one unique character.
We are required to write a JavaScript function that takes in a string and returns its power.
For example −
const str = "abbcccddddeeeeedcba"
Then the output should be 5,
because the substring "eeeee" is of length 5 with the character 'e' only.
Example
The code for this will be −
const str = "abbcccddddeeeeedcba" const maxPower = (str = '') => { let power = 1 const sz = str.length - 1 for(let i = 0; i < sz; ++i) { let count = 1 while(i < sz && str[i + 1] === str[i] && ++i) power = Math.max(power, ++count) } return power }; console.log(maxPower(str));
Output
And the output in the console will be −
5