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'/data modify [...] append' to concatenate two strings

Hey!

Here a little idea: use the append argument of the /data modify to concatenate strings.

Example:

I have an item with this nbt tag: {Item:{tag:{test:"Love",test2:"Slime"}}}

With this command:

/data modify entity @e[type=item,limit=1] Item.tag.test append from entity @e[type=item,limit=1] Item.tag.test2

The tag "test" gets for value "LoveSlime".

With "prepend" instead of "append", the result would be "SlimeLove".

theogiraudet shared this idea.

• January 11, 2019 17:17
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  Xavier Hervy commented

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  • March 04, 2019 14:02
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  Would be nice for nbt array too

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  Thick propheT commented

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  • May 05, 2019 05:43
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  This would be really useful for appending the player's UUID to the name field of a structure block e.g. "minecraft:some_structure/00000000-0000-0000-0000-000000000000". That way, you could allow each player to have a unique copy of a structure.

  I think this is a reasonable addition, since strings are treated as collections in many languages.

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  RELapis commented

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  • June 28, 2019 11:24
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  I think strings should just be treated like an array of characters, so you could use append, prepend, insert, and also specify the [0] index.

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  Teixon commented

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  • May 03, 2020 11:17
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  This would make them need to change strings to be treated as some sort of array-type. If you want to add elements to any array you need to use a value of the type that array will yield. In this case, maybe a new "character"-type? Otherwise saying "append string2 to string1" implies that you want to have an element within "string1" that is of a different type (an array-type again in this case) and that is not what you want.

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  Teixon commented

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  • May 03, 2020 12:53
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  What I could see them do is add a new operation like "concat": data modify (block <pos>|entity <target>) <path> concat (from (block <pos>|entity <target>) [<path>]|value <value>)

  And both your paths and value need to yield a string ofc.

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  SchildChef25167 commented

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  • May 29, 2020 09:18
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  Great Idea. Would be really useful when manipulating data. If numbers would also be automatically cast into Strings, like they are with the score selector in the chat or in signs, you could do some really interesting stuff with scores.

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  Splox Fox commented

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  • July 15, 2020 04:53
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  FYI McTsts did some command trickery that allows you to convert a string to an array of characters. The only missing link is turning these characters back into a single string.