SOURCE

function columation(n){
    if(n <= 1){
        return 1
    }else{
        return n + columation(n - 1)
    }
}
// console.log(columation(3))


function factorial(n){
    if(n <= 1){
        return 1
    }else{
        return n * factorial(n-1)
    }
}
// console.log(factorial(5))

function Fibonacci(n){
    if(n < 1){
        return 0
    }else if(n === 1 || n=== 2){
        return 1
    }else{
        return Fibonacci(n - 1) + Fibonacci(n-2)
    }
}
// console.log(Fibonacci(7))

let old = [
    {
        r: 0,
        c: 0,
        val: '呵呵'
    },
    {
        r: 1,
        c: 0,
        val: '嘻嘻'
    },
    {
        r: 2,
        c: 0,
        val: '哈哈'
    },
    {
        r: 3,
        c: 0,
        val: 'kk'
    },
]

let newData = {
}

old.forEach((v, index) => {
    if(v){
        let key = 'val' + 'index'
        let value = v.val
        newData[key] = value
    }
    console.log(newData)
})