to.go

// Copyright 2018, Shulhan <ms@kilabit.info>. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package strings

import (
	"fmt"
	"strconv"
)

//
// ToBytes convert slice of string into slice of slice of bytes.
//
func ToBytes(ss []string) (sv [][]byte) {
	for x := 0; x < len(ss); x++ {
		sv = append(sv, []byte(ss[x]))
	}
	return sv
}

//
// ToFloat64 convert slice of string to slice of float64. If converted
// string return error it will set the float value to 0.
//
func ToFloat64(ss []string) (sv []float64) {
	var v float64
	var e error

	for _, s := range ss {
		v, e = strconv.ParseFloat(s, 64)

		if nil != e {
			v = 0
		}

		sv = append(sv, v)
	}
	return
}

//
// ToInt64 convert slice of string to slice of int64. If converted
// string return an error it will set the integer value to 0.
//
func ToInt64(ss []string) (sv []int64) {
	for _, s := range ss {
		v, e := strconv.ParseInt(s, 10, 64)

		if e == nil {
			sv = append(sv, v)
			continue
		}

		// Handle error, try to convert to float64 first.
		ev := e.(*strconv.NumError)
		if ev.Err == strconv.ErrSyntax {
			f, e := strconv.ParseFloat(s, 64)
			if e == nil {
				v = int64(f)
			}
		}

		sv = append(sv, v)
	}
	return
}

//
// ToStrings convert slice of interface to slice of string.
//
func ToStrings(is []interface{}) (vs []string) {
	for x := 0; x < len(is); x++ {
		v := fmt.Sprintf("%v", is[x])
		vs = append(vs, v)
	}
	return
}