koala 0.1.0

koala: ^0.1.0 copied to clipboard

Baseline version. Duh.

Comply with data file format conventions.

Add toCsv method. Improve method documentation. Remove the rather pointless structureInfo method.

• Add shape property, columnIterable, withColumns, rowsAt, rowsWhere
• Incorporate Column class being returned upon accessing a DataFrame column, alongside methods for
  • transformation: cumulativeSum
  • accumulation: mean, max, min, sum
  • counting: count, countElementOccurrencesOf
  • null-ridding: nullFree, nullFreeIterable
  • mask conversion: equals, unequals, isIn, isNotIn, maskFrom; operators: <, >, <=, >=
• Enable conditional rows selection based on columns, e.g. final filteredDf = df.rowsWhere((df('a') > 7) & df('b').equals(null))