IFsiFormattable about deedle HOT 3 CLOSED

I did not know (or did not realize) this was possible. This is much nicer than messing with loader script!

The only issue is that the output can vary a little. Sometimes you'll get:

val it : Series<int, int> = Your
multiline 
string

and sometimes you'll get

val it : Series<int, int> = 
    Your
multiline 
string

It apparently depends on the type name - if it is too long, then F# adds linebreak and spaces on the next line. The Format members always add \n so things are aligned correctly, but sometimes there is a blank line. Still, I think this is better.

Also, I think not hiding the Format member is fine - it is quite useful for debugging, even in C#. I did not add it as ToString because I think ToString should return some shorter info - perhaps just size & column names or something like that.

Keeping this open as we still need to add ToString.

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I agree that a ToString should include just some concise info.

I think it is bad for Format to be a property and not somehow hidden from the debugger, because you can end up with a large dataframe that screws up your debugger because it is producing a massive string when you explore its properties.

from deedle.

I tried using StructuredFormatDisplay but that has other problems - in particular, the FSI does not call functions registered using fsi.AddPrintTransformer on the type when it has the attribute.

This is used by internal BM tool that adds visualizer for all variables defined in FSI - so we need it for internal reasons (but it would be nice to have similar tool as open-source, so it makes sense to avoid closing that option too).

So I'm reverting this back to IFsiFormattable with a load script...

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