Consecutive Letter Run-Length | Dataford Interview Questions

Given an array of characters, return a string that counts the number of each consecutive letter (for example, ["a","b","b","a"] becomes "a1b2a1").

The count applies only to consecutive identical characters, so separate runs of the same character must remain separate. The input is a list of single-character strings, and the output is one concatenated string containing each character followed by its run length.

Constraints

0 <= chars.length <= 1000
Each element of chars is a single-character string
Characters are compared exactly as provided
The output preserves the order of all consecutive runs

Function Signature

def count_consecutive_letters(chars):

Your question is Consecutive Letter Run-Length. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Given an array of characters, return a string that counts the number of each consecutive letter (for example, ["a","b","b","a"] becomes "a1b2a1").

Constraints

0 <= chars.length <= 1000
Each element of chars is a single-character string
Characters are compared exactly as provided
The output preserves the order of all consecutive runs

Function Signature

def count_consecutive_letters(chars):

Your question is Consecutive Letter Run-Length. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.