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CHANGELOG.md

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0.6.0

Support external CSV tokenizers

Internal functionality is now defined more cleanly atop a stream of rows already broken into columns (rather than a stream of rows that we quietly break into columns ourself). This permits the use of external parsers such as provided by the new Frames-dsv package that supplies a CSV parser built atop hw-dsv.

The built-in CSV parser remains for ease of installation.

0.5.1

GHC 8.6 compatibility

0.5.0

  • Renamed the rgetf and rputf exported by the Frames module to rgetField and rputField. This avoids clashing with the same names exported by vinyl and further advances the process of eliminating the old Frames Col type in favor of vinyl's ElField.

  • Add a ShowCSV class rather than leaning on overburdened Show instances.

  • Add support for categorical column types: values of these types are one of a small number of textual values. Because they can only take on a small number of different text values, we can compactly represent values of these types as standard Haskell sum types.

0.4.0

  • Added table joins in Data.Vinyl.Joins (Chris Hammill)

  • Changed types of mapMethod and mapMethodV

These now rely on explicit TypeApplications rather than Proxy values.

0.3.0

  • Pervasive use of pipes for CSV data loading

This provides better exception handling (file handles should be closed more reliably), and offers an interface point for customized handling of input texts. An example of this latter point is working with particular file encodings.

A breaking change is that operations that previously returned IO values now return MonadSafe constrained values.

  • Adaptation of Data.Vinyl.Curry.runcurry to the Frames Record type This simply strips the column name information from a row before applying the function from vinyl.

0.2.1

  • Refactored to use the CoRec type provided by vinyl >= 0.6.0

  • Fixed bug in typing mostly-numeric columns Such columns must be represented as Text. Previously, we strove a bit too hard to avoid falling back to Text resulting in dropping rows containing non-numeric values for columns we crammed into a numeric type.

  • Minor optimization of CSV parsing In particular, dealing with RFC4180 style quoting

  • GHC-8.2.1 compatibility

0.1.10

  • Added CSV output functions: produceCSV and writeCSV
  • Added an Eq instance for the Frame type

0.1.9

Fixed column type inference bug that led the inferencer to prefer Bool too strongly.

This was fallout from typing columns whose values are all 0 or 1 as Bool.

0.1.6

Re-export Frames.CSV.declareColumn from Frames. This makes it much easier to manually define column types.

0.1.4

Use microlens instead of lens-family-core for demos.

0.1.3

GHC-8.0.1 compatibility

0.1.2.1

Improved documentation based on suggestions by Alexander Kjeldaas

0.1.2

Fixed bug in Monoid instance of Frame (@dalejordan)

0.1.1.0

Added frameConsA, frameSnoc, and RecordColumns to help with changing row types.

0.1.0.0

Initial version pushed to hackage.