This is a common error for interactive development: julia> struct MyType a end julia> isapprox(a::MyType, b::MyType) = abs(a.a-a.b) ≤ 10 # FORGOT TO IMPORT isapprox (generic function with 1 method) julia> import Base.isapprox # SO LET'S MAKE UP FOR IT WARNING: import of Base.isapprox into Main co…

There might be a starting point here Support method deletion by timholy · Pull Request #57 · timholy/Revise.jl · GitHub

I may have missed something, but AFAICT that (awesome) package has code for deleting methods from the method table, not binding from a module.

Another approach, complementary, would be [as illustration] to inquire “do you want to import isapprox?” As it is, it is much much rarer to parallel operationalize an importable namthan it is to omit the module qualification. Others will have better ways to get here. imo this is an incremental way…

[image] JeffreySarnoff: it is much much rarer to parallel operationalize an importable namthan it is to omit the module qualification I don’t think I agree, I tend to reuse names with different bindings a lot. I would prefer a “fix it later” approach to Julia trying to guess what I am doing.

You can always do this: julia> isapprox(args...) = Base.isapprox(args...) # SO LET'S MAKE UP FOR IT isapprox (generic function with 2 methods) It is not exactly the same thing as importing first. (Your method will be called even if a more specific one exists in base.) But it’s probably good enough…

I understand that – and, as you like is best. I have chosen to avoid doing so much of the time, simply to allow the code to be clearer to me after doing other things. I used to do it your way with great glee.

unintern seems like a weird name for this since the symbol is not the issue, it’s the resolved binding that’s the issue. The current situation is pretty annoying and it would be great to figure out a way that trying the wrong thing doesn’t force you to restart your REPL session.

Julia does intern symbols, but doing so is unrelated to resolving bindings.

How about an undo buffer at the REPL? Hitting Cmd-Z would strike out the last command(s) and restore the global state. This might require a lot of memory shuffling, but other memory-intensive software like Photoshop still do it. (Of course the size of the buffer should be user-definable, and settin…

"unintern" symbol

General Usage

Tamas_Papp July 11, 2018, 5:42pm 9

Yes, it is weird in Julia since Julia does not intern symbols. That’s why I put it in quotes.

What I want is basically undo

f_not_yet_defined(...) = ...
const v_not_yet_defined = ...

in an interactive session.

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"unintern" symbol

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