将对象数组转换成数组对象

一、[ { 1: 1, 2: 2, 3: 3 }, { 1: 4, 2: 5, 3: 6 },{ 1: 7, 2: 8, 3: 9 }];转换为 { 1: [1,4,7] , 2:[2,5,8 ], 3:[3,6,9] }

  fn1() {
    let arr = [{ 1: 1, 2: 2, 3: 3 }, { 1: 4, 2: 5, 3: 6 },{ 1: 7, 2: 8, 3: 9 }];
  	let newarr = {};
  	arr.forEach((item) => {
    	for (let key in item) {
      		let value = newarr[key];
      		if (value) {
        	value.push(item[key]);
      } else {
        newarr[key] = [item[key]];
      }
    }
  });
  console.log(newarr); // {1: [1,4,7] , 2:[2,5,8 ], 3:[3,6,9] }
}

二、['john-reese', 'harold-finch', 'sameen-shaw'] 转换成 [{name: 'John Reese'}, {name: 'Harold Finch'}, {name: 'Sameen Shaw'}]

  fn2() {
  	let arr = ["john-reese", "harold-finch", "sameen-shaw"];
 	let objArray = arr.map((item) => {
    		item = item.replace("-", " ");
       		let a = item[0];
    		let b = a.toUpperCase();
    		item = item.replace(a, b);
    		return { name: item };
 	 });
 	 console.log(objArray);
}