Table method for autoconversion of column types

[numeredev]

DESCRIPTION

What does your feature request improve on? Please describe. During loading a file the column types are automatically detected and converted. Would be nice, if there's a method to do that also during runtime.

Describe the solution you'd like Create a table method like TABLE().autoconvert({1:ncols}) to automatically detect the best column type and convert it to this. Will of course only apply to string columns.

Additional context Add any other context or screenshots about the feature request here.

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DEVS' SECTION

ANALYSIS

• Extend the already existing bool Memory::convertColumns(const VectorIndex& _vCol, const std::string& _sType) in memory.cpp to handle the "auto" conversion type. This could be done by using TableColumn::TYPE_NONE as value for "auto" or by adding that explicit as TableColumn::TYPE_AUTO and then only convert string columns like it's done in void Memory::convert() (same file).
• Add the new value to the language files for convert()
• Add the new value to the documentation files for table

IMPLEMENTATION STEPS

(see also our Wiki for implementation guidelines)

• Implement the necessary changes in a new branch created here on GitHub
• Test your implementation

DOCUMENTATION STEPS

(see also our Wiki for further information)

• Update the changes log
• Add comments to your implementation
• Add Doxygen documentation comments
• Create or update the documentation articles (*.NHLP and *.NDB files, if needed)
• Update the language strings (*.NLNG files, if needed)

PULL REQUEST

• Create a pull request for your changes
• Fill out the template
• Assign @numere-org/maintainers as reviewers

[numeredev]

Might be more straightforward to instead of introducing a new method to extend the current method like TAB().convert({1:ncols}, "auto")

[numeredev]

Seems to erroneously autoconvert values.