<pre class="shiki github-dark shaku"><code>/** * @param {string} str * @return {string} */function snakeToCamel(str) { // your code here// const arr = str.split("_");// let result="" //= arr[0] || "_"; // Handle leading underscores correctly // for (let idx = 0; idx &lt; arr.length; idx++) {// let word = arr[idx];// if (word === "") {// result += "_"; // Add underscore for empty word// } else {// if(arr[idx-1] === ""){// result += word// } else if(arr[idx-1] === "" &amp;&amp; arr[idx-2] === ""){// result += word// } else{// result += word[0].toUpperCase() + word.slice(1);// }// }// }// console.log(arr,"111")// return result;if (!str) { return ""; // Handle empty string input } const parts = str.split('_'); let result = parts[0] || "_"; let track = false for (let i = 1; i &lt; parts.length; i++) { if (parts[i] === '') { if(i&lt;parts.length-1 &amp;&amp; track){ result += '__'; } else{ result += '_'; // Preserve consecutive underscores } } else { if(parts[i-1] === ""){ result +=parts[i] track = true } else { result += parts[i].charAt(0).toUpperCase() + parts[i].slice(1); track = true } } }console.log(parts,"11") return result;}// console.log(snakeToCamel('snake_case')) // // 'snakeCase'// console.log(snakeToCamel('is_flag_on')) // // 'isFlagOn'// console.log(snakeToCamel('is_IOS_or_Android')) // // 'isIOSOrAndroid'// console.log(snakeToCamel('_first_underscore')) // // '_firstUnderscore'// console.log(snakeToCamel('last_underscore_')) // // 'lastUnderscore_'// console.log(snakeToCamel('_double__underscore_')) // // '_double__underscore_'// // expect().toBe('__firstUnderscore')console.log(snakeToCamel('__first_underscore')) console.log(snakeToCamel('_double__underscore_')) //xpect(snakeToCamel('_double__underscore_')).toBe('_double__underscore_')</code></pre>

accepted code

Do you prefer snake_case or camelCase ? Anyway, please create a function to convert snake_case to camcelCase. snakeToCamel('snake_case') // 'snakeCase…