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package dasel
import (
"fmt"
"reflect"
)
var LastFunc = BasicFunction{
name: "last",
runFn: func(c *Context, s *Step, args []string) (Values, error) {
if err := requireNoArgs("last", args); err != nil {
return nil, err
}
input := s.inputs()
res := make(Values, 0)
for _, val := range input {
switch val.Kind() {
case reflect.Slice, reflect.Array:
index := val.Len() - 1
if val.Len() == 0 {
return nil, fmt.Errorf("index out of range: %w", &ErrIndexNotFound{Index: index})
}
value := val.Index(index)
res = append(res, value)
default:
return nil, fmt.Errorf("cannot use last selector on non slice/array types: %w", &ErrIndexNotFound{Index: 0})
}
}
return res, nil
},
}
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