Question

How to sort a slice of strings where each string represents a decimal number in Go

Answer 1

package main

import (
    "fmt"
    "sort"
    "strconv"
)

// Comparator function to sort strings as decimal numbers
func compareAsDecimal(a, b string) bool {
    // Convert strings to float64 for comparison
    numA, _ := strconv.ParseFloat(a, 64)
    numB, _ := strconv.ParseFloat(b, 64)

    return numA < numB
}

func main() {
    // Input slice of strings
    numbers := []string{"12.3", "5.6", "789.1", "3.14", "456.0", "0", "0.01", "4.0"}

    // Sort the slice using the custom comparator
    sort.Slice(numbers, func(i, j int) bool {
        return compareAsDecimal(numbers[i], numbers[j])
    })

    fmt.Println("Sorted slice of decimal strings:")
    for _, num := range numbers {
        fmt.Print(num + "  ")
    }
}



/*
run:

Sorted slice of decimal strings:
0  0.01  3.14  4.0  5.6  12.3  456.0  789.1  

*/

 

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