julia> reduce(vcat, [1,2]) 2-element Vector{Int64}: 1 2 julia> reduce(vcat, [1]) 1

Try passing an initial value: julia> reduce(vcat, [1]; init=Int[]) 1-element Vector{Int64}: 1 Also vcat takes k collections so your current code treats 1 as a collection, which works because Julia numbers are iterable but it’s not that nice imo: I prefer to use real collections: julia> reduce(vc…

Reduce not type stable

New to Julia

DanielVandH July 15, 2024, 2:23pm 2

This thread Inconsistency with `reduce(vcat, v)` when the vector has a single element has some links to past discussions about this issue

1 Like

Topic		Replies	Views
Inconsistency with `reduce(vcat, v)` when the vector has a single element General Usage type-stability	4	1103	February 3, 2022
Why is reduce with concatenation type unstable? General Usage question	2	582	August 19, 2020
How can I do list comprehension for vcat? General Usage question	10	1010	July 14, 2022
Coerce type of elements in an empty concatenation General Usage	1	401	March 16, 2020
Vector of Vectors with different size to one Vector General Usage vector	9	4433	June 2, 2020

Reduce not type stable

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