SOURCE

/** 
 * @params {array}:待转对象数组
 * @returns {Object}
 * fromPairs([['fred', 30], ['barney', 40]])
 * >{"fred":30,"barney":40}
 */
function fromPairs(array) {
    let result = {};
    if(!array||!array.length){
        return result;
    }
    for(const item of array){
        result[item[0]] = item[1]
    }
    return result;
}
console.log(fromPairs([['fred', {aa:'aa'}], ['barney', 40]]))