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@u (Entity Detector)

It is an entity detector that is directed to the entity that has

activated the command.

 

Example:

 

A player presses a button that activates a command block with this selector,

so the player who has pressed the button will be affected by the command block.

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• July 17, 2018 23:58
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  • July 18, 2018 23:30
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  i like it BUT it should be

  @s

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  • July 19, 2018 15:17
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  That is already in the game. It is @p (nearest player) or @s (self)

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  • July 19, 2018 22:59
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  This is literally @e(emtity selector) and you can select entities with @s or @r too

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  • July 21, 2018 03:10
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  It's not possible to tell "who" activated a command block. The command block runs its command when it receives redstone power, which can come from anywhere!

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  • July 21, 2018 23:43
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  tryashtar, yeah i know that it's almost impossible v':, but i believe in that 1% that it can be added, and it will simplificate the mapmaking.

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  • July 22, 2018 18:55
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  It seems easy to determine "who" activated redstone just by looking at it, but for the game to do that, it would need to keep track of a player UUID for every piece of redstone dust, and potentially every single redstone component, entity, and block that could be modified as part of a chain reaction. Storing all that is currently not possible, and would cause tremendous overhead all for a tiny result.

   

  Since it's not going to happen, you could always use a sign! Signs can run commands when clicked on, and the @s selector will target the player who clicked the sign!