broadcast!

broadcast!(f, dest, As...)

Like broadcast, but store the result of broadcast(f, As...) in the dest array. Note that dest is only used to store the result, and does not supply arguments to f unless it is also listed in the As, as in broadcast!(f, A, A, B) to perform A[:] = broadcast(f, A, B).

Examples

Broadcasting an operation and storing the result in a destination array:
```
julia> A = [1, 2, 3];
julia> B = [4, 5, 6];
julia> C = similar(A);
julia> broadcast!(+, C, A, B)
3-element Array{Int64,1}:
5
7
9
```
In this example, the + operation is broadcast between arrays A and B, and the result is stored in array C using broadcast!.
Broadcasting a function with multiple arguments:
```
julia> A = [1, 2, 3];
julia> B = [4, 5, 6];
julia> C = similar(A);
julia> broadcast!(pow, C, A, B)
3-element Array{Int64,1}:
1
32
729
```
In this example, the pow function is broadcast between arrays A and B, and the result is stored in array C using broadcast!.
Updating an array in-place with broadcasting:
```
julia> A = [1, 2, 3];
julia> B = [4, 5, 6];
julia> broadcast!(*, A, A, B)
3-element Array{Int64,1}:
4
10
18
```
This example shows how to update array A in-place with the result of broadcasting the * operation between arrays A and B.

Common mistake example:

julia> A = [1, 2, 3];
julia> B = [4, 5, 6, 7];
julia> C = similar(A);
julia> broadcast!(+, C, A, B)
ERROR: DimensionMismatch("arrays could not be broadcast to a common size")

In this example, the arrays A and B have different sizes, causing a DimensionMismatch error. Make sure the arrays being broadcasted have compatible dimensions to avoid this error.

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broadcast!

Examples

See Also

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