如何使用JavaScript以编程方式放置此值？

Question

I am getting some list of values from DataBase

var priceData = [];

data.jobs[i].low will give me the Value 

 for ( var i = 0; i < data.jobs.length; i++) 
{
// Need Help Here 

}

Now please tell me how can i construct the Array as

var priceData = [[0,100.34],[1,108.31],[2,109.40],[3,104.87],[4,106.00]

Means 0 index will give me 100.34 where data.jobs[0].low provides me 100.34 value , sorry fro my english .

Thanks

Answer 1

You have to create an other array, which contains the index of the iteration and the data

[i, data.jobs[i].low]

So it would be:

for (var i = 0; i < data.jobs.length; i++)  { 
    priceData.push([i, data.jobs[i].low]);
}

---

Update: The below suggestions are not relevant, as the data is indeed needed as 2d data. However I will leave it in case it is of any interest.

But this means you have to access the values with priceData[x][1] . More convenient (and natural) would be to put the values directly into the array (and not create an array of arrays):

for (var i = 0; i < data.jobs.length; i++)  { 
    priceData.push(data.jobs[i].low);
}

which would give you can array like this:

[100.34, 108.31, 109.40, 104.87, 106.00]

which can be accessed with priceData[x] .

In most cases there is no reason to store the index, as it is given implicitly by the position of the element in the array.

Answer 2

for ( var i = 0; i < data.jobs.length; i++) 
{
    priceData[i] = data.jobs[i];

}