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If you just want to assert that certain strings are convertible into certain types, https://github.com/asaskevich/govalidator contains a lot of handy functions to do just that.
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I started writing something to do this (dataframe). It will generate a dataframe (a collection of slices of different types, all the same length, each corresponding to a column). It tries to figure out from the first N lines what the type of each column is. There's support for int64, float64, bool and string-type columns. I haven't touched it for a year but I recall it was in a working state when I stopped.
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Scout APM
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