43 lines
1.4 KiB
Julia
43 lines
1.4 KiB
Julia
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# Julia uses unicode characters quite heavily. Mostly it is possible to avoid
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# using unicode completely, but it can make code look quite clean.
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# The unicode autocompletion for vscode mostly works, but can be a bit
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# unreliable, but the julia REPL (console) is also useful for writing unicode.
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# There is a whole section in the Julia docs dedicated to how to input different
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# unicode characters, so just search "Unicode Input" in the docs.
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# We've seen a lot of different unicode symbols, here are some more useful ones.
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# The infix operator for boolean xor is the ⊻ (\veebar, \xor) symbol.
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b = true ⊻ false
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# In the LinearAlgebra package the ⋅ (\cdot) symbol is overloaded as the
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# scalar product of vectors.
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using LinearAlgebra
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a = [1, 2] ⋅ [2, 1]
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@show a
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# Where you would write "in" you could probably use either ∈ (\n) or ∉ (\notin)
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# You can use ∈ for iteration
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for i ∈ 1 : 5
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# dostuff
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end
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# It can also be used for checking if an element is in a collection
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3 ∈ [1, 2, 3, 4]
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# And the notin symbol can be used to check if something isn't in the collection
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2 ∉ [1, 2, 3, 4]
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# The mathematical constants π (\pi) and ℯ (\euler) are defined as irrationals
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# that can be cast to a numeric type and they will be calculated to the
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# required precision.
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# This calculates pi the the precision of a Float64
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p = Float64(π)
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@show p
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# This will calculate the fraction closest to ℯ using Int16.
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e = Rational{Int16}(ℯ)
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@show e
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