This document describes how to implement ArrayList in a block coding manner.
As of April 17, 2025, ArrayList's name has been changed to List.
Index
Definition of List
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List is a data structure that uses continuous memory space to have data.
List Block
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Introduces the blocks entered the List category of SyncTree NBlock.
1) List
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Used to create (declare) an List data structure.
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Click the button to add or remove Value items.
button to add or remove Value items.
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Below is an example of the List block declaration.
2) Get Array Variable
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Use to import the Value of List as a whole, or a specific Key.
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Enter the variable name of the List object to import the information as the first factor.
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From the second factor (Item Keys), enter the index of List to import Value within List as Integer.
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If no Value is entered in Item Keys, Value is added after the last index in the List.
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Click the button to add or remove Value items.
button to add or remove Value items.•
If Item Keys is added, the index is sequentially searched in the nested List to find the value.
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Below is an example of using Get List Block.
3) Add Array Variable
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Adds a Value to List.
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Enter the variable name of the List object to which you want to add information as the first factor.
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Enter the Value to add to the Add value.
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Click the button to add or remove Item Keys.
button to add or remove Item Keys.•
If Item Keys is added, values are added by sequentially searching indexes in the nested List.
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Below is an example of using Add Array Block.
4) Remove Array Variable
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Remove Key and Value from List.
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Enter the variable name of the List object to import the information as the first factor.
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Click the button to add or remove Item Keys.
button to add or remove Item Keys.•
From the second factor (Item Keys), enter the index of the Value to remove within the List.
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If Item Keys is added, the index is sequentially searched in the nested List and values are removed.
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Below is an example of using Remove Array Block.
