在使用dataframe.ReadCSV时指定分隔符

Question

I'm trying to figure out how to use dataframe.LoadOptions in the gota library to specify a delimiter when reading the CSV file.

package main

import (
    "fmt"
    "github.com/kniren/gota/dataframe"
    "io/ioutil"
    "strings"
)

func main() {
    content, _ := ioutil.ReadFile("/path/to/csv/file.csv")
    ioContent := strings.NewReader(string(content))

    df := dataframe.ReadCSV(ioContent)

    fmt.Println(df)
}

The dataframe.ReadCSV function takes an options variable of type *dataframe.LoadOptions

I checked the definition for the dataframe.LoadOptions struct and found the following:

type LoadOption func(*loadOptions)

type loadOptions struct {
    defaultType series.Type
    detectTypes bool
    hasHeader bool
    names []string
    nanValues []string
    delimiter rune
    types map[string]series.Type
}

I'm new to Go and got stuck on this. First time I've come across a definition like this: type LoadOption func(*loadOptions)

Answer 1

This library uses functional options.

dataframe.ReadCSV takes any number of dataframe.LoadOption, where LoadOption is a function type. Look through the docs for things that return a value of LoadOption and pass those to ReadCSV:

dataframe.ReadCSV(ioContent,
    dataframe.WithDelimiter(';'),
    dataframe.HasHeader(true),
    // etc.
)