And although schemas provide some error handling, it is useful to complement them in the application.
虽然模式提供了一些错误处理，但是也需要在应用程序中加以补充。
The leading colon in this example tells getopts to be silent and suppress the normal error messages, as this script will provide its own error handling.
此例中的前导冒号告诉getopts 保持静默（silent）并抑制正常的错误消息，因为此脚本将提供它自己的错误处理。
The leading colon in this example tells getopts to be silent and suppress the normal error messages, as this script will provide its own error handling.
此例中的前导冒号告诉getopts 保持静默（silent）并抑制正常的错误消息，因为此脚本将提供它自己的错误处理。
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