func TestCountUniqChar(t *testing.T) {
line := "// Copyright 2016 Mhd Sulhan <*****@*****.**>. All rights reserved."
exp := 34
n := tekstus.CountUniqChar(line)
assert(t, exp, n, true)
}
/*
Compute character diversity.
*/
func (ftr *CharDiversity) Compute(dataset tabula.DatasetInterface) {
adds := dataset.GetColumnByName("additions")
for _, rec := range adds.Records {
intext := rec.String()
textlen := float64(len(intext))
nuniq := tekstus.CountUniqChar(intext)
v := math.Pow(textlen, 1/float64(1+nuniq))
ftr.PushBack(tabula.NewRecordReal(Round(v)))
}
}