I have a array of object in javascript

const arr = [ 
   {key: 'freq', value: '1'}, 
   {key: 'freq', value: '2'},
   {key: 'param', value: 'true'},
   {key: 'param', value: 'fasle'} 
]

and need some logic there I would like to get result something like below result

const result = `{
    "freq_1_param_true": {
        "freq": 1,
        "param": true
    },
    "freq_2_param_true": {
        "freq": 2,
        "param": true
    },
    "freq_1_param_false": {
        "freq": 1,
        "param": false
    },
    "freq_2_param_false": {
        "freq": 2,
        "param": false
    }
}`