Highcharts: Updating a Pie Chart with setData() - json

Question

I am trying to work out how to update a Highcharts pie chart but for the life of me cannot seem to get it working right.
I have looked over the documentation and have been able to get a bar and line and spline graph to update fine but when using this function for pie charts it just does not work.
I am currently feeding in:
item.setData([["none", 100]], true);
Where item equals the series like so:
$.each(browser_chart.series, function(i, item){
if(item.name == 'Browser share'){
console.log(data.browsers);
item.setData([["none", 100]], true);
}
});
Which as shown in the demos is how the data for a pie chart is formatted. Problem is it cannot seem to read the series correctly. I try:
item.setData([\"none\", 100], true);
And it seems to do something but cannot read the x and y values right (which of course means it's wrong).
Can anyone here point me in the direction to get this working?
Thanks,

Answer 1

Edited:
When you set a new data you have to set as array of arrays for all pie parts in this case.
In my Example I have six categories, so I've to set data for all of them.
So, in this case you have to do something like:
var seriesData = [];
$.each(browser_chart.series, function(i, item) {
if(item.name == 'Browser share'){
seriesData.push(["serie"+i, someNumber]);
}
});
chart.series[0].setData(seriesData, true);

Answer 2

I have marked Ricardos answer however my question involved a tad more that I didn't explain properly.
I was updating the pie chart through AJAX from JSON generated by a PHP Backend. When I applied new data to the pie chart it would break.
Using Ricardos answer I was able to find out it is because I have a different number of points so I cannot just update the pie chart I must remake it like so:
browser_chart_config.series[0].data = data.browsers;
browser_chart = new Highcharts.Chart(browser_chart_config);
This will allow you to update a chart when you have a different number of points.
Hope it helps,
EDIT: I also found out that this is a known issue with HighCharts: https://github.com/highslide-software/highcharts.com/issues/542

Answer 3

//initialise
var new_data;
new_data = [{ name: 'load percentage', y: 10.0, color: '#b2c831' },{ name: 'rest', y: 60.0, color: '#3d3d3d' }];
function requestData()
{
$.ajax({
url: 'live-server-data.php',
success: function(point)
{
var series = chart.series[0];
var y_val = parseInt(point[1]);
var x_val = 100 - y_val;
console.log(point[0]+ "," +point[1] );//["0"]
new_data = [{ name: 'load percentage', y:y_val, color: '#b2c831' },{ name: 'rest', y:x_val, color: '#3d3d3d' }];
series.setData(new_data);
// call it again after one second
},
cache: false
});
}