📂Julia

How to Invert a Bit Array in Julia

Code ¹

It’s quite simple, but a common mistake is to treat the negation operators ! and ~ not as unary operators but as functions, and use !. or ~.. They should be written as .! or .~ instead.

julia> a = rand(1,10) .< 0.5
1×10 BitMatrix:
 1  1  0  0  1  0  1  0  0  0

julia> .!(a)
1×10 BitMatrix:
 0  0  1  1  0  1  0  1  1  1

julia> .~(a)
1×10 BitMatrix:
 0  0  1  1  0  1  0  1  1  1

Environment

• OS: Windows
• julia: v1.6.0