julia> a = [1,2,3,4]; julia> b = a; julia> a[1] = 4; julia> b 4-element Array{Int64,1}: 4 2 3 4 This is the shallow copy AFAIK. But at a glance, I couldn’t find clear differences between copy() and deepcopy(), although Docs says copy() creates a shallow copy of a collection.

These are related to copying mutable objects. I assume you know the difference between copying by value and copying by reference. Let ‘a’ be a mutable object of some type. b = a copies ‘a’ by reference, so ‘b’ and ‘a’ refer to the same object. Therefore b.field1 = 2 makes a.field1 == 2 true. b = c…

What is the difference between copy() and deepcopy()?

General Usage

jiang_ming_zhang January 1, 2024, 5:39am 8

why do you take

A1 = [[1]]

Why not

A1 = [1]

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What is the difference between copy() and deepcopy()?

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