/
ToStringSlice.go
51 lines (42 loc) · 1.33 KB
/
ToStringSlice.go
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// =================================================================
//
// Copyright (C) 2019 Spatial Current, Inc. - All Rights Reserved
// Released as open source under the MIT License. See LICENSE file.
//
// =================================================================
package af
import (
"fmt"
"reflect"
)
func stringSlice(args ...interface{}) (interface{}, error) {
if len(args) != 1 {
return nil, &ErrInvalidArguments{Function: "ToStringSlice", Arguments: args}
}
if str, ok := args[0].(string); ok {
return []string{str}, nil
}
t := reflect.TypeOf(args[0])
if !(t.Kind() == reflect.Array || t.Kind() == reflect.Slice) {
if reflect.ValueOf(args[0]).Len() == 0 {
return nil, &ErrInvalidArguments{Function: "ToStringSlice", Arguments: args}
}
}
v := reflect.ValueOf(args[0])
l := v.Len()
arr := make([]string, 0, l)
for i := 0; i < l; i++ {
arr = append(arr, fmt.Sprint(v.Index(i).Interface()))
}
return arr, nil
}
var ToStringSlice = Function{
Name: "StringSlice",
Aliases: []string{"stringArray", "stringSlice"},
Definitions: []Definition{
Definition{Inputs: []interface{}{reflect.Array}, Output: stringSliceType},
Definition{Inputs: []interface{}{reflect.Slice}, Output: stringSliceType},
Definition{Inputs: []interface{}{reflect.String}, Output: stringSliceType},
},
Function: stringSlice,
}