'Is it possible to change order of operators in Julia?
I like to change the order of & programmatically. Is it possible? for example 3 < 4 & 1 < 4, & is evaluated first, but I like it be evaluated last.
Solution 1:[1]
You cannot change the precedence of & - precedence is resolved at parse time in Julia. Do either what Colin T Bowers suggested or use && which has a lower precedence than comparison operators.
Solution 2:[2]
Actually this is possible if you define an operator with lower precedence than & and give it the meaning of &.
julia> ?(a,b) = a & b
? (generic function with 1 method)
julia> 3 < 4 ? 1 < 4
true
This is of course some kind of "cheating" and it will make writing other pieces of code with ? awkward because it has now the same precedence level as the => operator.
The list of available operators along with their precedence can be found at: https://github.com/JuliaLang/julia/blob/master/src/julia-parser.scm
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 | Bogumił Kamiński |
| Solution 2 | Przemyslaw Szufel |