CODEWITHSUNDEEP
metaprogrammingjulia
Chris Rackauckas
Chris Rackauckas

Reputation: 19132

Array of Expressions to an Array Definition

I am writing a macro that makes it easier to write function definitions in a specific case, and the output is an expression for an array. I have gotten pretty far, and currently I can parse input into an expression of arrays, like

x = Expr[:(ones(length(u[:,1])) - 0.5 * u[:,1]),:(ones(length(u[:,2])) - u[:,2])]

But I need to take this and have it define the array where the columns are those expressions, like

[(ones(length(u[:,1])) - 0.5 * u[:,1]) (ones(length(u[:,2])) - u[:,2])]

And be able to do that for an arbitrary length expression array x. Is there a good way to construct this output?

Upvotes: 1

Views: 79

Answers (1)

Jeff Bezanson
Jeff Bezanson

Reputation: 3207

The expression head for the form [a b] is hcat. So e.g. Expr(:hcat, x...) should work.

Upvotes: 4

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