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LUA_5

1. …Œธ” ๊ธฐˆ

˜คŠ˜€ ฃจ•„งŒ ๊ฐ–๊ณ  žˆŠ” …Šน•œ žฃŒ๊ตฌกฐ …Œธ”— Œ€•„œ •Œ•„๊ฒ Šต‹ˆ‹ค. ฃจ•„—„œ …Œธ”€ •‰ฌ …Œธ”๊ณผ ๊ฐ™€ žฃŒ ๊ตฌกฐ ƒ˜ —ญ• „ •‹ˆ‹ค. …Œธ”€ ๊ฐ€–ฅ  ”„กœ๊ทธž˜ฐ„ ๊ฐ€Šฅ•˜๊ฒŒ •ฃผŠ” —ญ• „ ๊ฒน•‹ˆ‹ค. Šจ •ผ๊ธฐธ€Š” ฒœฒœžˆ „ค… “œฆฌ๊ฒ Šต‹ˆ‹ค. šฐ„  ๊ฐ„‹จ•˜๊ฒŒ žฃŒ๊ตฌกฐกœจ˜ …Œธ”„ ‚Ž ๊ฒ Šต‹ˆ‹ค.

•‰ฌ …Œธ”กœ ‚ฌšฉ•˜๊ธฐ

HashT = {a = 1, b = 2, c = 3, d = 4 }
print( Hashta )
1
print( Hashtb )
2

—ฌ๊ธฐ„œ a Š” ‚ค ๊ฐ’œผกœ ‚ฌšฉ ˜—ˆ๊ณ  1Š” a— •‘ œ ๊ฐ’œผกœ ‚ฌšฉ ˜—ˆŠต‹ˆ‹ค. ‚ค ๊ฐ’€ ‹จˆœžˆ ๊ฐ’œผกœ ง๊ณ  €ˆ˜กœ„ ‚ฌšฉ •  ˆ˜ žˆŠต‹ˆ‹ค.

HashT2 = { a = 1, b = 2, c= 3}
print ( HashT2.a )
1

Œ€‹  ๊ฐ’œผกœ ‚ค๊ฐ’„ ‚ฌšฉ• •Œ™€Š” ‹ค๊ฒŒ €ˆ˜—„œŠ” …Œธ”…— . กœ„ €ˆ˜ฅผ ฐธกฐ•  ˆ˜ žˆŠต‹ˆ‹ค. HashT2a กœ„ ฐธกฐ ๊ฐ€Šฅ•‹ˆ‹ค.

งŒ•…Œธ”„ งŒ“ค •Œ ‚ค๊ฐ’ —†‹ค ––๊ฒŒ  ๊นŒš”? ๊ทธŸผ  •ˆ˜˜•œผกœ ˆœฐจ œผกœ ฒˆ˜ธ๊ฐ€ งค๊ฒจง‘‹ˆ‹ค. ˜ˆฅผ “ค ‹คŒ๊ณผ ๊ฐ™Šต‹ˆ‹ค.

Fruit = { "apple","orange","banana" }
print ( Fruit1 )
apple

๊ทธ ‡๊ธฐ •Œฌธ— …Œธ”€ ฐฐ—กœ„ ‚ฌšฉ   ˆ˜ žˆŠต‹ˆ‹ค. ๊ทธŸผ ฐฐ—— ถ”๊ฐ€ œผกœ insert •˜๊ณ  remove • ๊ฒ Šต‹ˆ‹ค.

Fruit #Fruit + 1 = "grape" -- Fruit ˜ •„…œ ๊ฐฏˆ˜ฅผ –– + 1„ •„œ งˆ€ง‰ ฒจžฅผ ๊ตฌ• ๊ฐ’„ Œ€ž…•œ‹ค.
print( Fruit4 )
grape

 ‡๊ฒŒ ๊ท€ฐฎ๊ฒŒ ถ”๊ฐ€ฅผ •  ˆ˜„ žˆ€งŒ, ๊ฐ„‹จžˆ table.insert(Fruit,"kiwi") ฒ˜Ÿผ ๊ฐ„‹จžˆ •  ˆ˜„ žˆŠต‹ˆ‹ค. ‚ญ œŠ” table.remove(Fruit,4) กœ 4ฒˆงธ •„…œ„ ‚ญ œ •  ˆ˜ žˆŠต‹ˆ‹ค.

table.insert(Fruit,"mango")
print(Fruit6)
mango
table.remove(Fruit,6)
print(Fruit6)
nil

๊ทธฆฌ๊ณ  งŒ•ฐฐ—กœ ‚ฌšฉ•˜Š” …Œธ” ‚˜ ๊ฐ’“ค„  • ฌ•˜๊ณ  ‹ถœผ table.sortฅผ ‚ฌšฉ•˜ ฉ‹ˆ‹ค.
table.sort(Fruit)
for i = 1,#Fruit do print(Fruiti) end
apple
banana
kiwi
orange

2. …Œธ”๊ณผ •ˆ˜

€๊ธˆ๊นŒ€Š” ๊ฐ„‹จžˆ …Œธ”„ žฃŒ๊ตฌกฐกœ ‚ฌšฉ•˜˜€Š”ฐ, ฃจ•„—„œŠ” ๊ฑฐ˜ “  ๊ฒƒ …Œธ”˜ ‚คกœ ‚ฌšฉ   ˆ˜ žˆ๊ธฐ •Œฌธ— …Œธ”๊ณผ •ˆ˜ฅผ —ฐ๊ฒฐ •  ˆ˜ žˆŠต‹ˆ‹ค.

function Car(name)
local car_name = name
local function Go()
print( car_name .. " is running" )
end
return { Go = Go } -- —ฌ๊ธฐ„œ local function Goฅผ ฐ˜™˜•˜€กœ Car— Œ€•œ ฒ„ •ˆ˜กœ ‚ฌšฉ•  ˆ˜ žˆ‹ค.
end
myCar = Car("SM3") -- Car ผŠ” •ˆ˜ฅผ †ต• …Œธ”„ งŒ“ค๊ณ  …Œธ” ‚˜ •ˆ˜ฅผ †ต• ๊ฐ €–ฅ ฝ”“œ ž‘„ฑ
myCar.Go()
SM3 is running
myCar:Go()
SM3 is running

œ„˜ ˜ˆ œงŒœผกœ ๊ฐ €–ฅผ๊ณ  €๊ธฐ € €กฑ•œ  žˆŠ” ๊ฒƒ ๊ฐ™„คš”. ๊ทธŸผ € ” ๊ฐ€–ฅ œผกœ ฐ”๊ฟ” ณผ๊นŒš”?

Car = {}
function Car:new (obj)
obj = obj or {}
setmetatable(obj, self)
self.__index = self
return obj
end
mine = Car:new()

 ‡๊ฒŒ งŒ“ค € ” ๊ฐ €–ฅ œผกœ งŒ“ค ˆ˜ žˆŠต‹ˆ‹ค. —ฌ๊ธฐ„œ setmetatableผŠ” •ˆ˜๊ฐ€ ‚˜˜ต‹ˆ‹ค. metatable— Œ€•„œŠ” ‹คŒ ๊ฐ•˜—„œ „ค…•˜„ก •˜๊ฒ Šต‹ˆ‹ค.

3. งˆฆฌ
๊ฐ„‹จ•˜๊ฒŒ …Œธ”— Œ€•„œ ฐฐ› Šต‹ˆ‹ค. …Œธ”€ ฃจ•„—„œ ๊ฐ€žฅ ค‘š”•œ ƒ€žŽ๊ณ  ” ‹ค–‘•˜๊ฒŒ ™œšฉ•  ˆ˜ žˆŠต‹ˆ‹ค. ‚˜ค‘— € ” ๊นŠ …Œธ”— Œ€•„œ จ ๊ฒ Šต‹ˆ‹ค.
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