Programming/Python 2

[Python List] for loop ์•ˆ์—์„œ list.remove() ์‚ฌ์šฉ ์‹œ ์ฃผ์˜ํ•  ์ 

๋ฌธ์ œ์ƒํ™ฉ ํŒŒ์ด์ฌ ๋ฆฌ์ŠคํŠธ๋ฅผ for loop๋กœ ์ˆœํšŒํ•˜๋ฉด์„œ ์•„์ดํ…œ์˜ ๊ฐ’์ด 3 ๋ฏธ๋งŒ์ธ ๊ฒฝ์šฐ ๋ฆฌ์ŠคํŠธ์—์„œ ์‚ญ์ œํ•˜๊ณ ์ž ํ•ฉ๋‹ˆ๋‹ค. mylist์—” 1, 2 ๊ฐ’์ด ์‚ญ์ œ๋œ [3, 4, 5]๊ฐ€ ๋“ค์–ด์žˆ์„ ๊ฒƒ์ด๋ผ ์˜ˆ์ƒํ•˜์˜€๋Š”๋ฐ, mylist = [1, 2, 3, 4, 5] for item in mylist: if item < 3: mylist.remove(item) ๊ฒฐ๊ณผ๋Š” ์•„๋ž˜ ์ฒ˜๋Ÿผ 1๋งŒ ์‚ญ์ œ๋˜์—ˆ์Šต๋‹ˆ๋‹ค. print(mylist) # [2, 3, 4, 5] 2๋Š” ์™œ ์‚ญ์ œ ๋˜์ง€ ์•Š์•˜์„๊นŒ์š”? ๋””๋ฒ„๊น…ํ•ด๋ณด๋ฉด item์ด 0๋ฒˆ ์ธ๋ฑ์Šค๋ฅผ ์ฐธ์กฐํ•˜์—ฌ mylist.remove(1)์ด ์ˆ˜ํ–‰๋˜์–ด 1์ด ์‚ญ์ œ๋˜๊ณ  ๋‹ค์Œ์ธ๋ฑ์Šค์ธ 1๋ฒˆ ์ธ๋ฑ์Šค๋ฅผ ์ฐธ์กฐํ–ˆ์„ ๋•Œ, ๋ณ€๊ฒฝ๋œ ๋ฆฌ์ŠคํŠธ์—์„œ 1๋ฒˆ ์ธ๋ฑ์Šค์˜ ๊ฐ’์ธ(3)์„ ์ฐธ์กฐํ•˜๊ฒŒ ๋˜๋ฉด์„œ ์‚ญ์ œ ์ „ 1๋ฒˆ ์ธ๋ฑ์Šค์˜€๋˜ 2๋ฅผ ๊ฑด๋„ˆ๋›ฐ๊ฒŒ ๋ฉ๋‹ˆ๋‹ค..

Programming/Python 2021.03.17

Python์—์„œ์˜ Short-circuit evaluation(SCE)

๐Ÿ™‹๐Ÿป‍โ™€๏ธ ์•ˆ๋…•ํ•˜์„ธ์š”! ํ…Œ์ผ๋Ÿฌ์ž…๋‹ˆ๋‹ค. ํ”„๋กœ๊ทธ๋ž˜๋ฐ ์–ธ์–ด์—์„œ ์‚ฌ์šฉ๋˜๋Š” Evaluation strategies์—๋Š” ํฌ๊ฒŒ ์•„๋ž˜ ๋‹ค์„ฏ๊ฐ€์ง€ ์ „๋žต์ด ์žˆ์Šต๋‹ˆ๋‹ค. Evaluation strategies Eager evaluation Lazy evaluation Partial evaluation Remote evaluation Short-circuit evaluation ์˜ค๋Š˜์€ ๊ทธ ์ค‘์—์„œ Short-circuite evaluation(SCE)์˜ ์ •์˜ Python์—์„œ ์ ์šฉ๋˜๋Š” SCE ์— ๋Œ€ํ•ด ์ •๋ฆฌํ•ด๋ณด์•˜์Šต๋‹ˆ๋‹ค. Short-circuit evaluation(SCE) minimul evaluation. McCarthy evaluation. ๋‹จ๋ฝํ‰๊ฐ€. Evaluates boolean conditions lazily. and , o..

Programming/Python 2021.03.10