Filter Loop

Combine ipairs with an if guard to keep selected values.

filter_loop.lua

local limit = 
local kept = 0
local last = 0

for _, value in ipairs({2, 4, 6, 8}) do
  if value >= limit then
    kept = kept + 1
    last = value
  end
end

print("limit=" .. limit)
print("kept=" .. kept)
print("last=" .. last)

local limit = 
local kept = 0
local last = 0

for _, value in ipairs({2, 4, 6, 8}) do
  if value >= limit then
    kept = kept + 1
    last = value
  end
end

print("limit=" .. limit)
print("kept=" .. kept)
print("last=" .. last)

local limit = 
local kept = 0
local last = 0

for _, value in ipairs({2, 4, 6, 8}) do
  if value >= limit then
    kept = kept + 1
    last = value
  end
end

print("limit=" .. limit)
print("kept=" .. kept)
print("last=" .. last)

guarded iteration A loop can visit every value while an `if` statement decides which values affect the accumulated result.