Edit-Distance

/**
 * @param {string} word1
 * @param {string} word2
 * @return {number}
 */
let minDistance = function(word1, word2) {
   let wordArr1 = word1.split("")
   let wordArr2 = word2.split("")
   let count = 0
   
   for (let i = 0; i < wordArr1.length; i++) {
       if (wordArr2[i] === undefined) {
               wordArr1.slice(0, wordArr2.length + 1)
               count++
       }
       else if (wordArr2[i] !== wordArr1[i]) {
           wordArr1[i] = wordArr2[i]
           count++
       }
   }
    
    return count
};