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src/util.jl

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+module util
+
+export getDataFrameValue, dfRowtoString, dfToString
+
+using DataFrames
+
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+""" get a value from a dataframe row by a given key
+"""
+getDataFrameValue(row::DataFrameRow, key::Symbol) = row.:($key)
+
+
+""" convert df row into key:value string
+"""
+function dfRowtoString(row::DataFrameRow)::String
+  str = ""
+  for key in keys(row)
+    value = getDataFrameValue(row, key)
+    str *= "$key: $value, "
+  end
+  result = str[1:end-2] # remove ", " at the end of row
+  return result
+end
+
+
+""" convert df table into string
+"""
+function dfToString(df::DataFrame)
+  dfstr = ""
+  for (i, row) in enumerate(eachrow(df))
+    rowstr = dfRowtoString(row)
+    dfstr *= "$i) $rowstr\n"
+  end
+  return dfstr
+end
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+end # module util