string-array-duplicates.js

// In this Kata, you will be given an array of strings and your task is to remove 
// all consecutive duplicate letters from each string in the array.

// For example:

// dup(["abracadabra","allottee","assessee"]) = ["abracadabra","alote","asese"].

// dup(["kelless","keenness"]) = ["keles","kenes"].

// Strings will be lowercase only, no spaces. See test cases for more examples.

// Good luck!

function dup(s) {

    // const noDup = [];
    // for ( let i = 0; i < s.length; i++ ){
    //     let previousLetter = '';
    //     let noDupStr = '';
    //     for ( let j = 0; j < s[i].length; j++ ){
    //         const currentLetter = s[i][j]
    //         if ( previousLetter !== currentLetter ){
    //             noDupStr += currentLetter;
    //             previousLetter = currentLetter;
    //         }
    //     }
    //     noDup.push(noDupStr);
    // }

    return s.map(string => {
        let previousLetter = '';
        let noDupStr = '';
        for (let j = 0; j < string.length; j++) {
            const currentLetter = string[j];
            if (previousLetter !== currentLetter) {
                noDupStr += currentLetter;
                previousLetter = currentLetter;
            }
        }
        return noDupStr;
    })
};

const result = dup(["abracadabra", "allottee", "assessee"]);

console.log(result);