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August 6, 2019 09:28
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[Go] Simplify phone number
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var validPhoneNumber = regexp.MustCompile(`^(\+7|8) \(\d{3}\) \d{7}$`) | |
// SimplifyPhoneNumber transform "+7 (909) 9316826" (or "8 (909) 9316826") to "9099316826" | |
func SimplifyPhoneNumber(number string) (string, error) { | |
if !validPhoneNumber.MatchString(number) { | |
return "", fmt.Errorf("invalid phone number format: %s", number) | |
} | |
if len(number) == 15 { | |
return number[3:6] + number[8:], nil | |
} | |
return number[4:7] + number[9:], nil | |
} |
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