How to use cDataColumn.uniqueValues() to create a list
The .uniqueValues() method of cDataColumn will return a collection of cells – one for each unique value in the column. This is a really simple way of creating a look up table from a set of data. Here’s how to extract the unique values from one sheet and create a column of them in another
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VBA
Private Sub uniqueCells()
Dim dSet As New cDataSet, r As Range, cc As cCell
Set r = firstCell(wholeSheet("messAround"))
With dSet.populateData(wholeSheet("Sankey"))
r.Value = "sourceLabel"
If Not .Where Is Nothing Then
For Each cc In .column("sourceLabel").uniqueValues()
Set r = r.Offset(1)
r.Value = cc.Value
Next cc
End If
End With
End Sub
Google Apps Script
As per all examples on this site, I use caching for Google Apps Script.
function uniqueCells() {
var cache = sheetCache(“messAround”);
var ds = new cDataSet().populateData(wholeSheet(“Sankey”));
cache.setValue(“sourceLabel”,1,1);
if (ds.where()){
DebugPrint(ds.column(“sourceLabel”),sad(ds.where()));
ds.column(“sourceLabel”).uniqueValues().forEach(
function (item, index+1) {
cache.setValue(item.value(),index,1);
}
);
}
cache.close();
}
[/sourecode]
Walkthrough
Having populated the DataSet that represents the contents of the sheet ‘Sankey’, each unique value in the “sourceLabel” column is copied to a column in the “messAround” sheet, after giving the column a title.Sorting the values
. ,uniqueValues() takes an optional argument that selects the kind of sorting required as below. By default the list is presented in the order encountered.
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