Is the a way to view all of the metadata in the current note?

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Q1: How to save the state of a variable in order to be able to recreate it when needed?

Summary
  • Q: What is Serializing and Deserializing?
    • A: Serialization is the process of converting an object into a stream of bytes to store the object or transmit it to memory, a database, or a file. Its main purpose is to save the state of an object in order to be able to recreate it when needed. The reverse process is called deserialization.
  • Q: What Is Serialization?
  • Q: What is serializing and deserializing JSON?
  • Keywords: JSON
  • Key functions: JSON.stringify() and JSON.parse()
  • Keywords: JSON to a file
  • Basic Examples:
    • DVJS11: a JS variable to a JSON string(memory)
    • DVJS13: a JSON string(memory) to a JS variable
  • Basic Examples:
    • DVJS21: a JS variable to a JSON file
    • DVJS23: a JSON file to a JS variable
  • A Very Basic Example:
    • The step M25.DB01 of the DVJS12 :
      • At first: A JavaScript variable is transformed into a JSON string(memory) by the DVJS12.
      • Secondly: It is formatted by “Prettier - Code formatter v9.5.0” and toggled as a comment in the VScode(Visual Studio Code) by myself.
      • At last: It is appended to the note that contains the DVJS12 code by myself.
Summary_M25.DB01 of the DVJS12 
```JS
// M25.DB01 Debug Output: h_org_keys_to_lower_case
// #####################################################################
//dv.span("The following is the content of the `h_org_keys_to_lower_case`.\n");
//dv.span(JSON.stringify(h_org_keys_to_lower_case, null, 2), "\n");


//The following is the content of the h_org_keys_to_lower_case.
// let h_org_keys_to_lower_case = {
//     file: 1,
//     date: 2,
//     drinks_y: 1,
//     drinks_d: 1,
//     exercises_a: 1,
//     exercises_b: 1,
//     "exercises duration": 1,
//     expenses: 1,
//     remark: 1,
//     "exercises-duration": 1,
// };
```

Q2: How to reuse user-defined functions, a DVJS, or a DQL?

Summary
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