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juliaoperators

left arrow operator in Julia

I have a vector

a = collect(1:4)

What is the meaning of a <- a in Julia [result - false]

As per the documentation <- is not an assignment operator in Julia.

Solution

  • Here is a way to check it (so that in the future you will be able to solve similar problems more easily):

    julia> dump(:(a <- a))
Expr
  head: Symbol call
  args: Array{Any}((3,))
    1: Symbol <
    2: Symbol a
    3: Expr
      head: Symbol call
      args: Array{Any}((2,))
        1: Symbol -
        2: Symbol a

    So as you can see a <- a is the same as a < (-a) thus you are comparing, using the < operator the a vector with the -a vector.