如何更改数组对象中的值?

var stooges = [

            {label:1,value:1,placeCode: 'sh', stock_code: 40},

            {label:1,value:1,placeCode: 'sh', stock_code: 50},

            {label:1,value:1,placeCode: 'sz', stock_code: 60,status:1},

            {label:1,value:1,placeCode: 'sz', stock_code: 39,status:1}

        ];