js var 以及 let 的差异

例子

window.checklist=[{"boardname":"motor_board","cur":"1.0.0","new":"1.0.1"},{"boardname":"power_board","cur":"1.0.0","new":"1.0.1"},{"boardname":"imu_board","cur":"1.0.0","new":"1.0.1"},{"boardname":"sensor_board","cur":"1.0.0","new":"1.0.1"}]

board_list={"imu_board":[,,,,,,,],"sensor_board":[,,,,,,,],"power_board":[,,,,,,,],"motor_board":[,,,,,,,]}

findsuccess=function(list){
    for(i in list){
        if(list[i]==){
            return true
        }
    }
    return false
}
for (let i = ;i < ;i++){
    x=board_list[window.checklist[i].boardname]
    console.log(x)
    console.log(findsuccess(x))
}

例子

window.checklist=[{"boardname":"motor_board","cur":"1.0.0","new":"1.0.1"},{"boardname":"power_board","cur":"1.0.0","new":"1.0.1"},{"boardname":"imu_board","cur":"1.0.0","new":"1.0.1"},{"boardname":"sensor_board","cur":"1.0.0","new":"1.0.1"}]

board_list={"imu_board":[,,,,,,,],"sensor_board":[,,,,,,,],"power_board":[,,,,,,,],"motor_board":[,,,,,,,]}

findsuccess=function(list){
    for(i in list){
        if(list[i]==){
            return true
        }
    }
    return false
}

for (var i = ; i < ; i++) {
    x=board_list[window.checklist[i].boardname]
    console.log(x)
    console.log(findsuccess(x))
}