google visualization - Easy way to see if DataView is empty? -

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using google visualization api, there easy way see if dataview empty?

https://developers.google.com/chart/interactive/docs/reference#dataview

i can see perhaps using dataview.getvalue(0, 1) etc check nulls, contains column headings.

i'm guessing it's tricky dataview have many different formats, there generic way of checking empty data views? i'm using dataview pie chart.

if remember right, can done way

var predata = response.getdatatable(); var vals = new array(); var rownum = predata.getnumberofrows(); // make sure our data isn't empty. if (null==predata) // yoda here return;

returns data table returned data source. returns null if query execution failed , no data returned.


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