怎么遍历数组，给对应的属性加1

Question

需要遍历arr1的icon，如果和arr2相同，给arr1对应项的number+1

Answer 1

arr1.forEach((elem0,index0)=> {

  arr2.forEach((elem, index) => {

    if (elem.icon === elem0.icon) {

      elem0.number++

    }

  });

})