Types Data

WARNING

Type's system is unsatisfactory and will certainly be totally rethought in the future.

Understood first the structure and types

Two ways:

1. Converts pre-existing data once only
2. Converts pre-existing data and forces the type of future data
   1. And force the future data to be typed since submission
   2. Or silently convert untyped future data

Convert data to a type (one shot)

$df->col('a')->type(DataType::INT);

Keep an active conversion for a column

Set it

$df->col('a')->enforceType(DataType::INT);

Remove it

$df->col('a')->enforceType(null); # Note that data already converted, only the following additions we be concerned.