27 lines
551 B
Go
27 lines
551 B
Go
package builtins
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import (
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"monkey/internal/object"
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"monkey/internal/typing"
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"strings"
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)
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// Join ...
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func Join(args ...object.Object) object.Object {
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if err := typing.Check(
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"join", args,
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typing.ExactArgs(2),
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typing.WithTypes(object.ArrayType, object.StringType),
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); err != nil {
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return newError(err.Error())
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}
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arr := args[0].(*object.Array)
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sep := args[1].(*object.String)
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a := make([]string, len(arr.Elements))
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for i, el := range arr.Elements {
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a[i] = el.String()
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}
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return &object.String{Value: strings.Join(a, sep.Value)}
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}
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