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display "(empty range)" in case of empty ranges #57697

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display "(empty range)" in case of empty ranges #57697

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a599edc
impl: 3 argument show method for UnitRange
prashantrahul141 Mar 12, 2025
ba4887f
fix: doctest
prashantrahul141 Mar 12, 2025
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7 changes: 7 additions & 0 deletions base/show.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,13 @@ end

show(io::IO, ::MIME"text/plain", r::AbstractRange) = show(io, r) # always use the compact form for printing ranges

function show(io::IO, ::MIME"text/plain", r::UnitRange)
print(io, repr(first(r)), ':', repr(last(r)))
if isempty(r)
print(io, " (empty range)")
end
end

function show(io::IO, ::MIME"text/plain", r::LinRange)
isempty(r) && return show(io, r)
# show for LinRange, e.g.
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6 changes: 3 additions & 3 deletions base/sort.jl
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Expand Up @@ -336,13 +336,13 @@ julia> searchsorted([1, 2, 4, 5, 5, 7], 5) # multiple matches
4:5
julia> searchsorted([1, 2, 4, 5, 5, 7], 3) # no match, insert in the middle
3:2
3:2 (empty range)
julia> searchsorted([1, 2, 4, 5, 5, 7], 9) # no match, insert at end
7:6
7:6 (empty range)
julia> searchsorted([1, 2, 4, 5, 5, 7], 0) # no match, insert at start
1:0
1:0 (empty range)
julia> searchsorted([1=>"one", 2=>"two", 2=>"two", 4=>"four"], 2=>"two", by=first) # compare the keys of the pairs
2:3
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