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Update julia.html.markdown

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Assignment vs copy: see https://discourse.julialang.org/t/is-it-worth-introducing-copy-into-learnxiny/55965/2
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azev77 2021-02-24 23:08:35 -05:00 committed by GitHub
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@ -356,6 +356,20 @@ intersect(filledSet, otherSet) # => Set([4, 3, 5])
union(filledSet, otherSet) # => Set([4, 2, 3, 5, 6, 1]) union(filledSet, otherSet) # => Set([4, 2, 3, 5, 6, 1])
setdiff(Set([1,2,3,4]), Set([2,3,5])) # => Set([4, 1]) setdiff(Set([1,2,3,4]), Set([2,3,5])) # => Set([4, 1])
# Assignment with `=` attaches a new label to the same value without copying
a = [1, 2, 3]
b = a
# Now `b` and `a` point to the same value, so changing one affects the other:
a[3] = 5
b[3] # => 5
# The `copy()` function can create a shallow copy of an array, dictionary,
# or other container
a = [1, 2, 3]
c = copy(a)
a[3] = 5
c[3] # => 3
#################################################### ####################################################
## 3. Control Flow ## 3. Control Flow
#################################################### ####################################################