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Use BigInt when sorting filenames (#22)

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This commit is contained in:
Alex Ling 2020-03-27 04:45:03 +00:00
parent 1a0c3d81ce
commit d58c83fbd8
2 changed files with 11 additions and 1 deletions
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8
spec/util_spec.cr
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@ -25,4 +25,12 @@ describe "compare_alphanumerically" do
compare_alphanumerically a, b compare_alphanumerically a, b
}.should eq ary }.should eq ary
end end
# https://github.com/hkalexling/Mango/issues/22
it "handles numbers larger than Int32" do
ary = ["14410155591588.jpg", "21410155591588.png", "104410155591588.jpg"]
ary.reverse.sort {|a, b|
compare_alphanumerically a, b
}.should eq ary
end
end end

4
src/util.cr
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@ -1,3 +1,5 @@
require "big"
IMGS_PER_PAGE = 5 IMGS_PER_PAGE = 5
macro layout(name) macro layout(name)
@ -56,7 +58,7 @@ def compare_alphanumerically(c, d)
return -1 if a.nil? return -1 if a.nil?
return 1 if b.nil? return 1 if b.nil?
if is_numeric(a) && is_numeric(b) if is_numeric(a) && is_numeric(b)
compare = a.to_i <=> b.to_i compare = a.to_big_i <=> b.to_big_i
return compare if compare != 0 return compare if compare != 0
else else
compare = a <=> b compare = a <=> b