37 lines
890 B
Go
37 lines
890 B
Go
package builtins
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import "monkey/object"
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import (
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"strings"
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)
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// Find ...
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func Find(args ...object.Object) object.Object {
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if len(args) != 2 {
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return newError("wrong number of arguments. got=%d, want=2",
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len(args))
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}
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if haystack, ok := args[0].(*object.String); ok {
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if needle, ok := args[1].(*object.String); ok {
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index := strings.Index(haystack.Value, needle.Value)
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return &object.Integer{Value: int64(index)}
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} else {
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return newError("expected arg #2 to be `str` got got=%T", args[1])
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}
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} else if haystack, ok := args[0].(*object.Array); ok {
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needle := args[1]
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index := -1
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for i, el := range haystack.Elements {
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if cmp, ok := el.(object.Comparable); ok && cmp.Equal(needle) {
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index = i
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break
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}
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}
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return &object.Integer{Value: int64(index)}
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} else {
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return newError("expected arg #1 to be `str` or `array` got got=%T", args[0])
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}
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}
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