List set index

Tato sekce je dostupná pouze v angličtině.

This block is used for inserting/setting elements to the list data type. Left part defines the source variable of the list type.

Method of insertion:

set: sets a specific element to a new value,
insert at: inserts new value to the element on a specific position.

Then the selection of the new element position follows:

#: specific position in the list in entered,
# from end: specific position counted from the end of the list is entered,
first: value is entered as the first element of the list,
last: value is entered as the last element of the list.

Entered value is connected from the right side.

Block XML representation

XML representation of the lists_set_index block

<xml xmlns="http://www.w3.org/1999/xhtml">
  <block type="lists_set_index">
    <mutation at="true"/>
    <field name="MODE">SET</field>
    <field name="WHERE">FROM_START</field>
    <value name="VALUE">
      <block type="variables_get">
        <field name="VAR">list</field>
      </block>
    </value>
    <value name="AT">
      <block type="math_number">
        <field name="NUM">0</field>
      </block>
    </value>
    <value name="TO">
      <block type="text">
        <field name="TEXT">value</field>
      </block>
    </value>
  </block>
  <block type="lists_set_index">
    <mutation at="true"/>
    <field name="MODE">INSERT</field>
    <field name="WHERE">FROM_END</field>
    <value name="VALUE">
      <block type="variables_get">
        <field name="VAR">list</field>
      </block>
    </value>
    <value name="AT">
      <block type="math_number">
        <field name="NUM">0</field>
      </block>
    </value>
    <value name="TO">
      <block type="text">
        <field name="TEXT">value</field>
      </block>
    </value>
  </block>
  <block type="lists_set_index">
    <mutation at="false"/>
    <field name="MODE">SET</field>
    <field name="WHERE">FIRST</field>
    <value name="VALUE">
      <block type="variables_get">
        <field name="VAR">list</field>
      </block>
    </value>
    <value name="TO">
      <block type="text">
        <field name="TEXT">value</field>
      </block>
    </value>
  </block>
  <block type="lists_set_index">
    <mutation at="false"/>
    <field name="MODE">INSERT</field>
    <field name="WHERE">LAST</field>
    <value name="VALUE">
      <block type="variables_get">
        <field name="VAR">list</field>
      </block>
    </value>
    <value name="TO">
      <block type="text">
        <field name="TEXT">value</field>
      </block>
    </value>
  </block>
</xml>

Example of visual representation

Block "List set index" — Block “List set index”

Example of block usage

Example of "List set index" block — Example of “List set index” block

Block is used on the “in list” rows in the example:

New variable list of the list data type with elements “item1” and “item2” is created.
Value “item3” is entered on the first position on the “in list” row.
Value “item_set” is entered on the second position is entered on the next “in list” row.

List containing values = [“item3”, “item_set”, “item2”] is the result of the program.

Processing result

Results of "List set index" block — Results of “List set index” block