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":[1,2,11,12,21,22,31,32],"sensor_board":[1,2,11,12,21,22,31,32],"power_board":[1,2,11,12,21,22,31,32],"motor_board":[1,2,11,12,21,22,31,32]}

findsuccess=function(list){
    for(i in list){
        if(list[i]==32){
            return true
        }
    }
    return false
}
for (let i = 0;i < 4;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":[1,2,11,12,21,22,31,32],"sensor_board":[1,2,11,12,21,22,31,32],"power_board":[1,2,11,12,21,22,31,32],"motor_board":[1,2,11,12,21,22,31,32]}

findsuccess=function(list){
    for(i in list){
        if(list[i]==32){
            return true
        }
    }
    return false
}

for (var i = 0; i < 4; i++) {
    x=board_list[window.checklist[i].boardname]
    console.log(x)
    console.log(findsuccess(x))
}