Arrays Javascript

Question

I seem to be going around in circles on something I know is really easy. But I must be having a bad day.

I want to populate a 2d array dynamically.

If I do it statically like this:

arrChartValues = new Array(['Q1', 20], ['Q2', 10], ['Q3', 30]);

But I want it to be in a loop inserting lots of pairs of values.

Do you want to know how to loop over multiple axes, set elements of the 2D array, set elements of the 1D arrays or something else? — outis, Jan 18 '10 at 13:28

score 4 · Answer 1 · answered Jan 18 '10 at 13:27

4

For example:

arrChartValues = [];

for (var i=1;i<10;i++)
   arrChartValue.push(["Q" + i,i*10])

answered Jan 18 '10 at 13:27

Philippe Leybaert

score 0 · Answer 2 · answered Jan 18 '10 at 13:26

0

If you want to add new items to an existing array, use the push method like this:

arrChartValues = new Array(['Q1', 20], ['Q2', 10], ['Q3', 30]);
arrChartValues.push(['Q4', 40]);

answered Jan 18 '10 at 13:26

Gumbo

I don't know how many data pairs there will be so I need to build the array dynamically in a loop. – Oliver Jan 18 '10 at 13:28

score 0 · Accepted Answer · answered Jan 18 '10 at 13:27

0

var a= [];
for (i=0; i<20; i++){
  a[i]= ['q'+i, i];
}

answered Jan 18 '10 at 13:27

naivists

score 0 · Answer 4 · answered Jan 18 '10 at 13:28

0

var arrChartValues = [];

then in your loop:

arrChartValues.push(['Q1', 20]);

which adds the value to your array

answered Jan 18 '10 at 13:28

Josh

4 Answers4