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mention Ref for scalarizing a broadcast argument #45244

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mention Ref for scalarizing a broadcast argument #45244

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mention Ref for scalarizing a broadcast argument
stevengj May 9, 2022
bda53e6
Update arrays.md
stevengj May 9, 2022
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6 changes: 3 additions & 3 deletions doc/src/manual/arrays.md
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Expand Up @@ -1075,13 +1075,13 @@ julia> string.(1:3, ". ", ["First", "Second", "Third"])
```

Sometimes, you want a container (like an array) that would normally participate in broadcast to be "protected"
from broadcast's behavior of iterating over all of its elements. By placing it inside another container
(like a single element [`Tuple`](@ref)) broadcast will treat it as a single value.
from broadcast's behavior of iterating over all of its elements. By placing it inside another container,
like a single-element [`Tuple`](@ref) or a [`Ref`](@ref) (which acts like a 0-dimensional array), broadcast will treat it as a single value rather than as a container.
```jldoctest
julia> ([1, 2, 3], [4, 5, 6]) .+ ([1, 2, 3],)
([2, 4, 6], [5, 7, 9])

julia> ([1, 2, 3], [4, 5, 6]) .+ tuple([1, 2, 3])
julia> ([1, 2, 3], [4, 5, 6]) .+ Ref([1, 2, 3])
([2, 4, 6], [5, 7, 9])
```

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