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Add table.count_equals

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This commit is contained in:
Lars Mueller 2022-07-10 12:06:30 +02:00
parent 494d109833
commit d4c6468cec
1 changed files with 9 additions and 0 deletions
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9
table.lua
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@ -350,6 +350,15 @@ function count(table)
return count return count
end end
function count_equals(table, count)
local k
for _ = 1, count do
k = next(table, k)
if k == nil then return false end -- less than n keys
end
return next(table, k) == nil -- no (n + 1)th entry
end
function is_empty(table) function is_empty(table)
return next(table) == nil return next(table) == nil
end end