Why is there no update method for Tuple

Questions / Help
1

I find there is update method for List but not for Tuple. Because this is not efficiency?

2

There is the Tuple.append function (docs).

I think the main idea behind tuples is for them to generally be fixed length and not often changed in this way.

3

There’s not such a thing in elixir, but you can always use the erlang’s setelement/3

http://erlang.org/doc/man/erlang.html#setelement-3

iex(11)> :erlang.setelement(2, {1,2,3}, "foo")
{1, "foo", 3}
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4

Thanks, will lookup erlang next time :slight_smile:

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5

Sure there is, it’s called put_elem/3:

iex(1)> put_elem({:foo, :bar, :baz}, 1, :qux)
{:foo, :qux, :baz}
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6

Thanks to remind me I always keep relying on erlang libs…

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7

Is there an update function for Tuples similar to Kernel’s update_in, which accepts an update function?

8

You can use Access.elem with all the *_in functions

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