When programming with Scratch, sometimes we may come across situations where we want to turn several variables and lists into a a string of characters, like making archive code.

For example, we can use the following script to make a simple archive code:

And we can use the following script to get data from the archive code (Using Suger Extension):

In more complex cases, where we want to convert lists into a string of characters, the method using separators like the script above becomes more complicated.

In that situation, we can use Archive Code Extension. With Archive Code Extension, we can make and decode archive codes conveniently.

The extension use a "container". You can store variables and lists in this "container" and convert them into an archive code, which is actually a JSON string.

Clear all data stored in Container.

Add data to Container and name it.

Convert the contents in Container into a string. (in JSON format actually)

e.g. Use the script below to add several values and list to Container.

And use the block below to convert all the data in Container into an archive code.

The archive code will be like:

Parse a string of archive code to Container.

e.g. Use the script below to get several data from the archive code.

If failed to parse, the block below will return false. And the original contents in Container will be preserved

e.g. Run the script below, the parse failed, and the original contents in Container won’t change.

Use the block below to get the corresponding content of the name.

Use the following blocks to save content to variable or list.

For example, if there are two variables and a list that contains two items in Container, the block will return 3. (two variables and a list)

Get certain information of the xth content

determine whether Container contains content with certain name.

return the length of the list with certain name.

(return blank character if the content is not a list or the list doesn’t exsit)

Get the xth content in certain list.

Delete content with certain name in Container.

These blocks are used to encrypt / decrypt something. You can use them to encrypt archive code.

What does the “key” do: only both keys in encryption and decryption match, the text can be correctly decrypted.

For example, you can use players’ userID as the key, so that only the correct person can decrypt the text correctly and get the text.

Copy something to the clipboard. It can be used to copy the archive code.

Get the code of a character. The code ranges from 0 to 65535. For example, Unicode of character “A” is 65.

Those two blocks can be used to make your own encryption algorithms.

Make and read archive codes with the following scripts:

Use the following scripts to make the cloud archive:

As we know, in Simple MMO Extension, every player has only one extra data,which make it hard to store multiple data of the player.

In this case, we can use Archivecode Extension like this:

What’s more, when using boardcasting in Simple MMO, sometimes we may need to boardcast a message with multiple information.

Then we can use the script like below:

For example, supposed that we want to store several tile maps in a list, and we hope that each map only occupies one item in the list.

Then we can convert all information of a map into a string of characters with Archivecode Extension, so that we can save them in a list conveniently.