30 lines
413 B
Go
30 lines
413 B
Go
package unpackstring
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import (
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"errors"
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"regexp"
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)
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var ErrInvalidString = errors.New("invalid string")
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func Unpack(str string) (string, error) {
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// Place your code here.
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err := CheckString(str)
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if err != nil {
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return "", err
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}
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return "", nil
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}
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func CheckString(str string) error {
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re, _ := regexp.Compile(`^\d|\d{2,}`)
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if re.MatchString(str) == true {
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return ErrInvalidString
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}
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return nil
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}
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