Constants

Explain what Constants is.

Introduction

In Go-Sail, some system constants are defined and stored under the contents package for use in some specific scenarios.

• code
  It is used to define business response codes or error codes.
  tip

  The RegisterCode() function will provide powerful help in injecting custom error codes and error messages.
  We will introduce its purpose and usage in detail in the subsequent chapters.

• error
  It is used to define error codes and error messages. It also supports i18n.
• i18n
  It is used to define language encoding and adopts the ISO-3166-1 standard.
• keys
  Currently used to define the prefix and suffix identifiers of public and private keys.
• sail
  Contains the framework’s logo characters and version number.
• status
  Boolean value used for success and failure in response.
• time
  Currently, time zone characters and date printing templates for various time zones around the world are defined.