diff --git a/logseq/.recycle/pages_๐Ÿ‘ฉ๐Ÿปโ€๐Ÿ’ปแ„แ…ฉแ„ƒแ…ตแ†ผ แ„แ…ตแ†ธ แ„แ…ฉแ„ƒแ…ณ แ„†แ…ฉแ„‹แ…ณแ†ท.md b/logseq/.recycle/pages_๐Ÿ‘ฉ๐Ÿปโ€๐Ÿ’ปแ„แ…ฉแ„ƒแ…ตแ†ผ แ„แ…ตแ†ธ แ„แ…ฉแ„ƒแ…ณ แ„†แ…ฉแ„‹แ…ณแ†ท.md deleted file mode 100755 index df0095f..0000000 --- a/logseq/.recycle/pages_๐Ÿ‘ฉ๐Ÿปโ€๐Ÿ’ปแ„แ…ฉแ„ƒแ…ตแ†ผ แ„แ…ตแ†ธ แ„แ…ฉแ„ƒแ…ณ แ„†แ…ฉแ„‹แ…ณแ†ท.md +++ /dev/null @@ -1,283 +0,0 @@ -deck:: Logseq/coding tip - -- ## **โ– Javascript / Typescript** - - ### **โ–บ ์ด์ฐจ์› ๋ฐฐ์—ด(n*m) ์ƒ์„ฑ** - - id:: 6867f897-928a-4f22-8184-491fa70314db - 1. Array.from() ์‚ฌ์šฉ๋ฒ• - - ```javascript - const arr = Array.from({length : n}, () => new Array(m).fill(0)); - ``` - - id:: 6867f8fc-3249-4ced-91aa-a2c951c11b0b - 2. Array().fill() ์‚ฌ์šฉ๋ฒ• - - ```javascript - const arr = new Array(n).fill().map(() => new Array(m).fill(0)); - ``` - - id:: 6867f8fe-39c6-438b-a045-4f8687ad0b1d - 3. ๋ฐ˜๋ณต๋ฌธ ์ˆœํšŒ - - ```javascript - let arr = []; - for(int i=0; i {์กฐ๊ฑด์‹})** - id:: 686922a8-1c72-4261-8339-aff6ece36f03 - - **๋ฐฐ์—ด์˜ ๋ชจ๋“  ์š”์†Œ๊ฐ€ ์กฐ๊ฑด์‹์„ ๋งŒ์กฑํ•˜๋Š”์ง€ ํ™•์ธํ•ด์„œ true/false๋ฅผ ๋ฐ˜ํ™˜ํ•˜๋Š” ๋งค์„œ๋“œ** - - **elememt : ํ˜„์žฌ ์š”์†Œ, index : ํ˜„์žฌ ์ธ๋ฑ์Šค(์ƒ๋žต๊ฐ€๋Šฅ), array : ์›๋ณธ ๋ฐฐ์—ด(์ƒ๋žต ๊ฐ€๋Šฅ)** - - **๋ฐฐ์—ด์˜ ๋ชจ๋“  ์š”์†Œ๊ฐ€ ํŠน์ • ๊ฐ’์ธ์ง€ ํ˜น์€ ํŠน์ • ๋ฒ”์œ„์— ์žˆ๋Š”์ง€ ํ™•์ธํ•˜๋Š” ์šฉ๋„๋กœ ์‚ฌ์šฉ๊ฐ€๋Šฅ** - - ```javascript - const arr = [1,2,3,4,5,6,7,8,9,10]; - - arr.every((v,i) => v===i+1); // true - arr.every((v,i,array) => { - if(i<[array.length-1]){ - return array[i] < array[i+1]; - } - else { - return true; - } - }); // true - arr.every(v => v===arr[0]); // false - ``` - - ### **โ—ผ๏ธŽ Array.slice(start_idx, end_idx)** - id:: 68692600-551c-488b-ad74-de8145729133 - - **๋ฐฐ์—ด์—์„œ ํŠน์ • ๋ฒ”์œ„์˜ ์ธ๋ฑ์Šค ๋ถ€๋ถ„๋งŒ ์ž˜๋ผ๋‚ด์„œ ๊ทธ ๋ฐฐ์—ด์„ ๋ฐ˜ํ™˜ํ•˜๋Š” ๋งค์„œ๋“œ** - - **end_idx๋Š” ์ƒ๋žต ๊ฐ€๋Šฅํ•˜๋‹ค** - - ์ด ๊ฒฝ์šฐ์—๋Š” start_idx ๋ถ€ํ„ฐ ๋๊นŒ์ง€ ๋ฐ˜ํ™˜ํ•œ๋‹ค. - - **๋ฐฐ์—ด์˜ start_idx ์ธ๋ฑ์Šค ๋ถ€ํ„ฐ end_idx - 1 ์ธ๋ฑ์Šค๊นŒ์ง€์˜ ๋ฐฐ์—ด์„ ์ž˜๋ผ๋‚ด์„œ ๋ฐ˜ํ™˜ํ™ค** - - ์˜ˆ๋ฅผ ๋“ค๋ฉด arr.slice(2,7) ์€ arr์˜ ์ธ๋ฑ์Šค2 ๋ถ€ํ„ฐ ์ธ๋ฑ์Šค 6๊นŒ์ง€์˜ ๋ฐฐ์—ด์„ ๋ฐ˜ํ™˜ํ•จ. - - **๋ฒ”์œ„๋ฅผ ์ดˆ๊ณผํ•ด๋„ ์—๋Ÿฌ๋ฅผ ๋‚ด์ง€ ์•Š์Œ. ๊ทธ์ € ๋นˆ ๋ฐฐ์—ด์„ ๋ฐ˜ํ™˜ํ•  ๋ฟ์ž„.** - - **์•„๋ฌด๋ฆฌ ํ˜ธ์ถœํ•ด๋„ ์›๋ณธ ๋ฐฐ์—ด ์ž์ฒด๋ฅผ ๋ฐ”๊พธ์ง€๋Š” ์•Š๋Š”๋‹ค.** - - ```javascript - const arr = [0,1,2,3,4,5,6,7,8,9,10]; - - const arr1 = arr.slice(2); // [2,3,4,5,6,7,8,9,10] - const arr2 = arr.slice(5,10); // [5,6,7,8,9] - const arr3 = arr.slice(12); // [] - ``` - - ### **โ—ผ๏ธŽ Array.forEach((element, index, array) => {})** - id:: 6869280c-f685-44c4-b73e-a33f351be582 - - **๋ฐฐ์—ด์˜ ๋ชจ๋“  ์š”์†Œ๋ฅผ ์ˆœ์„œ๋Œ€๋กœ ์ˆœํšŒํ•˜๋ฉด์„œ ์ฝ”๋“œ๋ฅผ ์‹คํ–‰ํ•˜๋Š” ๋งค์„œ๋“œ** - - **element(ํ˜„์žฌ ์š”์†Œ)๋Š” ๋ฐ˜๋“œ์‹œ ํ•„์š”ํ•˜๊ณ , index(ํ˜„์žฌ ์ธ๋ฑ์Šค)์™€ array(์›๋ณธ ๋ฐฐ์—ด)๋Š” ์ƒ๋žต ๊ฐ€๋Šฅํ•˜๋‹ค.** - - **๋ชจ๋“  ๋ฐฐ์—ด์„ ์ˆœํšŒํ•˜๋Š” ๋ฐ˜๋ณต๋ฌธ๊ณผ ๋น„์Šทํ•˜๊ฒŒ ์‚ฌ์šฉ์ด ๊ฐ€๋Šฅํ•˜๋‹ค** - - ๋‹จ ๋ฐ˜๋ณต๋ฌธ์—์„œ ์“ฐ์ด๋Š” continue๋‚˜ break๋Š” ์‚ฌ์šฉํ•  ์ˆ˜ ์—†๋‹ค. - - return์„ continue ์ฒ˜๋Ÿผ ์‚ฌ์šฉํ•  ์ˆ˜ ์žˆ๊ณ , break๋Š” ์‚ฌ์šฉํ•  ์ˆ˜ ์—†๋‹ค. - - ์ฆ‰ break๊ฐ€ ๊ผญ ํ•„์š”ํ•˜๋‹ค๋ฉด ๋ฐ˜๋ณต๋ฌธ์œผ๋กœ ๊ตฌํ˜„ํ•œ๋‹ค. - - ```javascript - const arr = [1,2,3,4,5]; - arr.forEach(v => { - if(v===3) return; - console.log(v); - }); - // 1 2 4 5 - ``` - - ### **โ—ผ๏ธŽ Array.reduce((acc, element, index) => {์ฝœ๋ฐฑํ•จ์ˆ˜}, initial value)** - id:: 6869298b-18fd-4524-a697-c1af9e510c34 - - **๋ฐฐ์—ด์˜ ๊ฐ ์š”์†Œ๋ณ„๋กœ ์ˆœํšŒํ•˜๋ฉฐ ๋ˆ„์ ์ž(acc)๋ฅผ ๊ณ„์‚ฐํ•˜๊ณ  ๋ชจ๋“  ์ˆœํšŒ๋ฅผ ๋งˆ์นœ ๋’ค์˜ ๋ˆ„์ ์ž๋ฅผ ๋ฐ˜ํ™˜ํ•˜๋Š” ๋งค์„œ๋“œ** - - **์ดˆ๊ธฐ๊ฐ’์„ ์ž…๋ ฅํ•˜์ง€ ์•Š์œผ๋ฉด ๊ธฐ๋ณธ์ ์œผ๋กœ acc๋Š” 0์œผ๋กœ ์ดˆ๊ธฐํ™” ๋œ ์ฑ„ ์‹คํ–‰๋œ๋‹ค.** - - **์ฝ”๋“œ๊ฐ€ ํ•œ์ค„์ด๋ฉด ๊ตณ์ด return์œผ๋กœ ๋ฐ˜ํ™˜์„ ํ•  ํ•„์š”๋Š” ์—†์œผ๋‚˜ ๊ณ„์‚ฐ์ฝ”๋“œ๊ฐ€ 2์ค„ ์ด์ƒ์ด๋ฉด ๋ˆ„์ ๊ฐ’์„ ์ง์ ‘ return ํ•ด์ฃผ์–ด์•ผ ํ•œ๋‹ค.** - - ```javascript - const arr = [1,2,3,4,5]; - const sum = arr.reduce((acc,v) => acc + v, 0); // 15 - const sum_odd = arr.reduce((acc,v) => { - if(v%2===0) return acc; - else return acc+v; - },0); //9 - ``` - - ### **โ—ผ๏ธŽ Array.sort((a,b)=>{์ฝœ๋ฐฑํ•จ์ˆ˜})** - id:: 686a6dfd-328e-4dd0-bd8a-abbef2ae13ee - - **๋ฐฐ์—ด์„ ์ •๋ ฌํ•˜๋Š” ๋งค์„œ๋“œ์ด๊ณ  ๊ธฐ๋ณธ์ ์œผ๋กœ ํŒŒ๋ผ๋ฏธํ„ฐ๋ฅผ ์ž…๋ ฅํ•˜์ง€ ์•Š์œผ๋ฉด ์˜ค๋ฆ„์ฐจ์ˆœ์œผ๋กœ ์ •๋ ฌํ•œ๋‹ค.** - - **๋ฐ˜ํ™˜๊ฐ’์€ ์—†๊ณ  ์›๋ณธ ๋ฐฐ์—ด ์ž์ฒด๋ฅผ ๋ณ€๊ฒฝํ•œ๋‹ค.** - - **์ด ์ •๋ ฌ ์•Œ๊ณ ๋ฆฌ์ฆ˜์€ ๋ฐฐ์—ด์˜ ๋ฐ์ดํ„ฐ๋ฅผ ๋ฌด์กฐ๊ฑด ๋ฌธ์žํ˜•์œผ๋กœ ๋ณด๊ณ  ์ •๋ ฌ(์‚ฌ์ „์ˆœ)ํ•˜๊ธฐ ๋•Œ๋ฌธ์— ์ˆซ์ž๋ฅผ ์ •๋ ฌํ•  ๋•Œ๋Š” ์ด์ƒํ•˜๊ฒŒ ์ •๋ ฌ์ด ๋  ์ˆ˜๋„ ์žˆ๋‹ค.** - - [10,2,5,9,8,7] ์„ ์˜ค๋ฆ„์ฐจ์ˆœ ์ •๋ ฌํ•˜๋ฉด [2,5,7,8,9,10] ์ด ๋˜์–ด์•ผ ํ•˜์ง€๋งŒ ์ด๊ฑธ ๋ฌธ์ž๋กœ ๋ณด๊ณ  ์ •๋ ฌํ•˜๊ธฐ ๋•Œ๋ฌธ์— ์‹ค์ œ๋กœ๋Š” [10,2,5,7,8,9] ๋กœ ์ •๋ ฌ๋œ๋‹ค. - - **์ˆซ์ž์— ๋Œ€ํ•ด์„œ ์ œ๋Œ€๋กœ ์ •๋ ฌํ•˜๊ธฐ ์œ„ํ•ด์„œ๋Š” ์ฝœ๋ฐฑํ•จ์ˆ˜๋ฅผ ๋„ฃ์–ด์ค˜์•ผ ํ•œ๋‹ค.** - - a์™€ b๋Š” ๊ฐ๊ฐ ์ธ๋ฑ์Šค ๊ธฐ์ค€์œผ๋กœ ๋ณด๋ฉด a๊ฐ€ b๋ณด๋‹ค ์•ž์„  ์ธ๋ฑ์Šค์— ์žˆ๋Š” ๋‘ ์š”์†Œ๋“ค์„ ์˜๋ฏธํ•œ๋‹ค. - - ์ด ๋‘ ์š”์†Œ ์‚ฌ์ด์˜ ์ธ๋ฑ์Šค ๊ฐ„๊ฒฉ์€ ์‹ ๊ฒฝ์“ฐ์ง€ ์•Š๋Š”๋‹ค. ๊ทธ์ € a๊ฐ€ ์•ž์— ์žˆ๋‹ค๋Š” ๊ฒƒ๋งŒ ๊ธฐ์–ตํ•˜์ž. - - ์ด๋•Œ ์ด a์™€ b์˜ ๊ด€๊ณ„์‹์„ ํ†ตํ•ด ์ฝœ๋ฐฑํ•จ์ˆ˜์˜ ๋ฐ˜ํ™˜๊ฐ’์„ ์„ค์ •ํ•ด์„œ ์ด ๊ด€๊ณ„์‹์ด ๋ชจ๋“  ์ •๋ ฌ์ด ๋๋‚œ ๋’ค์— ์ด ๋ฐ˜ํ™˜๊ฐ’์ด ๋ชจ๋‘ false๊ฐ€ ๋˜๋ฉด ์ •๋ ฌ์ด ์™„๋ฃŒ๋œ ๊ฒƒ์œผ๋กœ ์ทจ๊ธ‰ํ•œ๋‹ค. - - **์˜ˆ์‹œ** - - ```javascript - const arr = [5,9,7,4,3,2,8]; - arr.sort((a,b)=>a-b); //[2,3,4,5,7,8,9] ์˜ค๋ฆ„์ฐจ์ˆœ - // ์ด์ „ ์ธ๋ฑ์Šค ์š”์†Œ์™€ ๋‹ค์Œ ์ธ๋ฑ์Šค ์š”์†Œ์˜ ์ฐจ์ด๊ฐ€ ๋ชจ๋‘ ์–‘์ˆ˜๊ฐ€ ์•„๋‹ˆ๊ฒŒ ๋˜๋„๋ก ์ •๋ ฌํ•œ๋‹ค - arr.sort((a-b)=>b-a); //[9,8,7,5,4,3,2] ๋‚ด๋ฆผ์ฐจ์ˆœ - // ์ด์ „ ์ธ๋ฑ์Šค ์š”์†Œ์™€ ๋‹ค์Œ ์ธ๋ฑ์Šค ์š”์†Œ์˜ ์ฐจ์ด๊ฐ€ ๋ชจ๋‘ ์Œ์ˆ˜๊ฐ€ ์•„๋‹ˆ๊ฒŒ ๋˜๋„๋ก ์ •๋ ฌํ•œ๋‹ค - ``` - - ### **โ–บ Object ์ž๋ฃŒํ˜•** - - ### **โ—ผ๏ธŽ ์ •์˜ ๋ฐ ์„ ์–ธ ๋ฐ ์ ‘๊ทผ๋ฐฉ๋ฒ•** - id:: 6874a753-d361-4df8-8dd5-15bb865ac8df - - ํ‚ค(key)์™€ ๊ฐ’(value)์„ ๊ฐ€์ง€๋Š” ๋ฐ์ดํ„ฐ์˜ ์ง‘ํ•ฉ - - ์ž์ฒด์ ์œผ๋กœ๋Š” iterableํ•˜์ง€ ์•Š์Œ(๋ฐ˜๋ณต๊ฐ€๋Šฅํ•œ ์ž๋ฃŒํ˜•์ด ์•„๋‹˜) - - ๋”ฐ๋ผ์„œ for๋ฌธ์—์„œ ์ˆœํšŒํ•  ๋•Œ for ... in Object.keys(), Object.values(), Object.entries() ์™€ ๊ฐ™์€ ๋ฐฉ๋ฒ•์œผ๋กœ ์ˆœํšŒํ•ด์•ผํ•จ - - ํ‚ค๋Š” ๋ฌด์กฐ๊ฑด ๋ฌธ์ž์—ด๊ณผ ์‹ฌ๋ณผ๋งŒ ๊ฐ€๋Šฅํ•จ. - - ํ‚ค์˜ ์‚ฝ์ž… ์ˆœ์„œ๊ฐ€ ๋ณด์žฅ๋˜์ง€ ์•Š์Œ. - - ```javascript - // ๋นˆ๋ฐ์ดํ„ฐ ์ดˆ๊ธฐํ™” ๋ฐฉ๋ฒ• - let obj = {}; - - // ์ง์ ‘ ์„ ์–ธ ๋ฐฉ๋ฒ• - let obj = { - "name": "Yechan", - "age" : 30 - }; - - // ์ถœ๋ ฅ - console.log(obj.name); - console.log(obj["age"]); - // Yechan - // 30 - // ๋‘ ๋ฐฉ๋ฒ• ๋ชจ๋‘ ์‚ฌ์šฉ ๊ฐ€๋Šฅ - ``` - - ### **โ—ผ๏ธŽ ํ‚ค ๋ฐ ๊ฐ’ ์ˆœํšŒ** - - **for ... in** - id:: 6874a966-4831-47ed-b969-a7d6d6269a9b - - ๊ธฐ๋ณธ์ ์œผ๋กœ Object์˜ ํ‚ค๊ฐ’์„ ์ˆœํšŒํ•จ. - - ```javascript - let obj = { - "name": "Yechan", - "age" : 30 - }; - - for(let key in obj){ - console.log(obj[key]); - } - ``` - - **for ... of** - id:: 6874a9fd-e3da-475b-95d8-06889eb8ce56 - - ๊ฐ ๊ฐ์ฒด์˜ ๋งค์„œ๋“œ๋ฅผ ํ†ตํ•ด ํ‚ค, ๊ฐ’, ํ˜น์€ ๋‘˜ ๋‹ค๋ฅผ ์ง์ ‘ ๊ฐ€์ ธ์™€์„œ ์ˆœํšŒํ•ด์•ผํ•จ. - - ```javascript - let obj = { - "name": "Yechan", - "age" : 30 - }; - - for key of Object.keys(obj) { - console.log(key, obj[key]); - } - // name Yechan - // age 30 - - // key, value ์ˆœํšŒ - for [key, value] of Object.entries(obj) { - console.log(key, value); - } - // name Yechan - // age 30 - ``` - - ### **โ–บ ๋ฐ˜๋ณต๊ฐ€๋Šฅ ๊ฐ์ฒด์—์„œ์˜ ์ˆœํšŒ** - - ### **โ—ผ๏ธŽ ์ผ๋ฐ˜์ ์ธ ๋ฐฉ๋ฒ•(for๋ฌธ)** - id:: 6874a69f-d252-4666-813b-17e1e2b50101 - - for๋ฌธ์—์„œ of๋กœ ํ•˜๋‚˜์”ฉ ์ˆœํšŒํ•จ - - ```javascript - const num = [1,2,3,4,5]; - for(let n of num) { - console.log(n); - } - // 1 2 3 4 5 - ``` -- ## **โ– Python** - - ### **โ–บ ์ด์ฐจ์› ๋ฐฐ์—ด(n*m) ์ƒ์„ฑ** - id:: 6867f994-13d0-4937-90e9-d8aec7be5d67 - - ```python - arr = [[0]*m for _ in range(n)] - ``` - - ### **โ–บ ๋ฐฐ์—ด ๊ด€๋ จ ๋งค์„œ๋“œ** - - ### **โ—ผ๏ธŽ arr.count(value)** - id:: 686a721d-df2e-4662-a6dd-c235cce8c5ac - - ๋ฆฌ์ŠคํŠธ, ํ˜น์€ ๋ฌธ์ž์—ด์—์„œ ํŠน์ • ๊ฐ’์˜ ๊ฐœ์ˆ˜๋ฅผ ๋ฐ˜ํ™˜ํ•˜๋Š” ๋งค์„œ๋“œ - - ```python - string = "aaabbcccc" - print(string.count('a')) # 3 - print(string.count('b')) # 2 - print(string.count('c')) # 4 - - arr = [1,2,2,3,3,3,4,4,4,4] - print(arr.count(1)) # 1 - print(arr.count(2)) # 2 - print(arr.count(3)) # 3 - print(arr.count(4)) # 4 - ``` - - ### **โ—ผ๏ธŽ arr.sort()** - id:: 686a726b-38e3-4adc-836a-2d0856046e73 - - ์›๋ณธ ๋ฐฐ์—ด ์ž์ฒด๋ฅผ ์ •๋ ฌํ•˜๋Š” ๋งค์„œ๋“œ. - - ๊ธฐ๋ณธ๊ฐ’์€ ์˜ค๋ฆ„์ฐจ์ˆœ์ด๊ณ  ํŒŒ๋ผ๋ฏธํ„ฐ์— reverse=True ๋ฅผ ํ•˜๋ฉด ๋‚ด๋ฆผ์ฐจ์ˆœ์œผ๋กœ ์ •๋ ฌ๋จ. - - ๋ฌธ์ž์—ด์—๋„ ์ •๋ ฌ์ด ๊ฐ€๋Šฅํ•จ. - - ๋‹จ ๋ฌธ์ž์—ด์ด ๋ฌธ์ž๋“ค๋กœ ์ด๋ค„์ง„ ๋ฆฌ์ŠคํŠธ๋กœ ๋ฐ”๋€Œ๊ฒŒ ๋จ์œผ๋กœ ๋‹ค์‹œ ๋ฌธ์ž์—ด๋กœ ๋ฐ”๊พธ๊ธฐ ์œ„ํ•ด์„œ๋Š” join์„ ์ด์šฉํ•ด์„œ ํ•ฉ์ณ์ค˜์•ผํ•จ. - - ```python - arr = [5,8,2,4,9] - arr.sort() # 2 4 5 8 9 - arr.sort(reverse=True) # 9 8 5 4 2 - ``` - - ### **โ—ผ๏ธŽ sorted(arr)** - id:: 686a732c-734e-417c-b7e2-f3bfb8caa71b - - ๋ณ€์ˆ˜๋กœ ๋“ค์–ด์˜จ ๋ฐฐ์—ด์„ ์ •๋ ฌํ•œ ๋’ค ๊ทธ ๊ฒฐ๊ณผ๋ฅผ ๋ฐ˜ํ™˜ํ•˜๋Š” ๋งค์„œ๋“œ, ์ฆ‰ ๋ฐ˜ํ™˜๊ฐ’์ด ๋ฐฐ์—ด์ž„. - - ๊ธฐ๋ณธ๊ฐ’์€ ์˜ค๋ฆ„์ฐจ์ˆœ์ด๊ณ  ํŒŒ๋ผ๋ฏธํ„ฐ์— reverse=True ๋ฅผ ํ•˜๋ฉด ๋‚ด๋ฆผ์ฐจ์ˆœ์œผ๋กœ ์ •๋ ฌ๋จ. - id:: 686a734e-b423-486f-8ec7-e5491e310fe0 - - ```python - arr = [5,8,2,4,9] - arr1 = sorted(arr) - arr2 = sorted(arr, reverse=True) - print(arr1) :-> # 2 4 5 8 9 - print(arr2) # 9 8 5 4 2 - ``` -- ## **โ– C** -- ## **โ– Java** -- ## **โ– ํ”„๋กœ๊ทธ๋ž˜๋ฐ ๊ด€๋ จ ์ด๋ก  ์ •๋ฆฌ** - - ### **โ–บ ์•Œ๊ณ ๋ฆฌ์ฆ˜** - - ### **โ—ผ๏ธŽ ์ง„์ˆ˜๋ณ€ํ™˜ ์•Œ๊ณ ๋ฆฌ์ฆ˜** - - โ—‰ **B์ง„์ˆ˜ ์ˆซ์ž N์„ 10์ง„์ˆ˜๋กœ ๋ฐ”๊พธ๊ธฐ(๋ˆ„์ ๊ณฑ)** - id:: 687250f4-c492-4481-90b4-2894f302b02d - - ์ตœ์ข… ๋ณ€ํ™˜ ๊ฒฐ๊ณผ result ๋ฅผ 0์œผ๋กœ ์ดˆ๊ธฐํ™” - - B์ง„์ˆ˜ ์ˆซ์ž N์˜ ๊ฐ€์žฅ ์™ผ์ชฝ์ž๋ฆฌ๋ถ€ํ„ฐ ํ•œ์ž๋ฆฌ์”ฉ ์ˆœํšŒํ•˜๋ฉด์„œ ์ง„ํ–‰ - - ์ˆœํšŒํ•˜๋ฉฐ ์ฝ์€ ๊ฐ’์„ 10์ง„์ˆ˜๋กœ ๋ฐ”๊ฟˆ(10 ์ด์ƒ์˜ ์ˆ˜๋Š” A=10, B=11 ๋“ฑ๋“ฑ), ์ด ๊ฐ’์„ val๋กœ ์ง€์ • - - result = result*B + val - - ๋ชจ๋“  ์ž๋ฆฌ์ˆ˜์— ๋Œ€ํ•ด ์ˆ˜ํ–‰ํ•˜๊ณ  ๋‚˜๋ฉด ์ตœ์ข…์ ์œผ๋กœ result์— 10์ง„์ˆ˜๋กœ ๋ณ€ํ™˜๋œ ์ˆซ์ž๊ฐ€ ๋‚˜์˜ด. - - โ—‰ **10์ง„์ˆ˜ ์ˆซ์ž N์„ B์ง„์ˆ˜๋กœ ๋ฐ”๊พธ๊ธฐ(๋‚˜๋จธ์ง€ ๊ณ„์‚ฐ๋ฒ•)** - id:: 6872521b-6fe5-4b65-a929-38c176052368 - - ์ตœ์ข… ๋ณ€ํ™˜ ๊ฒฐ๊ณผ result ๋ฅผ ๋ฐฐ์—ด๋กœ์„œ ์ดˆ๊ธฐํ™” - - N์ด 0์ด ๋  ๋•Œ๊นŒ์ง€ ๋ฐ˜๋ณต๋ฌธ์„ ๋Œ๋ฆผ - - val = N%B - - ์ด๋•Œ ๊ณ„์‚ฐ๋œ val๊ฐ’์„ B์ง„์ˆ˜์— ๋งž๊ฒŒ ๋ณ€ํ™˜์—์„œ result ๋ฐฐ์—ด์— ์‚ฝ์ž…. - - ์•ž์—์„œ๋ถ€ํ„ฐ ์ˆœ์„œ๋Œ€๋กœ ๋„ฃ๋Š”๋‹ค. - - N = N//B - - result ๋ฐฐ์—ด์„ ๋งจ ๋งˆ์ง€๋ง‰ ์ธ๋ฑ์Šค๋ถ€ํ„ฐ ์—ญ์ˆœ์œผ๋กœ ์ฝ์œผ๋ฉด ๊ทธ๊ฒƒ์ด ์ตœ์ข… ๋ณ€ํ™˜ ๊ฒฐ๊ณผ. - - ### **โ—ผ๏ธŽ ์œ ํด๋ฆฌ๋“œ ํ˜ธ์ œ๋ฒ•(์ตœ์†Œ๊ณต๋ฐฐ์ˆ˜, ์ตœ๋Œ€๊ณต์•ฝ์ˆ˜ ๊ตฌํ•˜๊ธฐ)** - - โ—‰ **์ตœ๋Œ€๊ณต์•ฝ์ˆ˜(GCD) ๊ตฌํ•˜๊ธฐ** - id:: 687253f3-7eb2-421e-b8c0-d9b96d4d7323 - - ์ž…๋ ฅํ•œ ๋‘ ์ˆ˜์˜ ์ตœ๋Œ€๊ณต์•ฝ์ˆ˜๋ฅผ ๊ตฌํ•˜๋Š” ํ•จ์ˆ˜ GCD์—์„œ ์•„๋ž˜์˜ ๋‘ ๊ณต์‹์ด ์„ฑ๋ฆฝํ•œ๋‹ค. - - GCD(a, b) = GCD(b, a % b) - - GCD(a, 0) = a - - ์œ„์˜ ๊ณต์‹์„ ๋ฐ”ํƒ•์œผ๋กœ ๋‹ค์Œ์˜ ๊ณผ์ •์„ ํ†ตํ•ด ์ตœ๋Œ€๊ณต์•ฝ์ˆ˜๋ฅผ ๊ตฌํ•œ๋‹ค.(a>=b) - - 1. r = a%b - - 2. a-b, b=r ๋กœ ๊ฐ’ ๊ฐฑ์‹  - - 3. b = 0์ด๋ฉด, a๊ฐ€ ์ตœ๋Œ€๊ณต์•ฝ์ˆ˜ - - 4. b != 0์ด๋ฉด ๋‹ค์‹œ 1๋ฒˆ๋ถ€ํ„ฐ ์‹คํ–‰ - - ์œ ํด๋ฆฌ๋“œ ํ˜ธ์ œ๋ฒ• gcd ์˜ˆ์‹œ์ฝ”๋“œ - id:: 687255f3-27a7-4bef-a684-60daab2fa33f - - ์žฌ๊ท€๋ฐฉ์‹ - - ```python - def gcd(a,b): - return a if b==0 else gcd(b, a%b) - ``` - - ๋ฐ˜๋ณต๋ฌธ ๋ฐฉ์‹ - - ```python - def gcd(a,b): - while b: - a, b = b, a%b - return a - ``` - - โ—‰ **์ตœ์†Œ๊ณต๋ฐฐ์ˆ˜(LCM) ๊ตฌํ•˜๊ธฐ** - id:: 687256b1-be35-4052-a12e-133e2c3b2f50 - - ๋‘ ์ˆ˜ a,b์™€ ๊ทธ ์ˆ˜์˜ ์ตœ๋Œ€๊ณต์•ฝ์ˆ˜(GCD)๋ฅผ ์•Œ๋ฉด a,b์˜ ์ตœ์†Œ๊ณต๋ฐฐ์ˆ˜(LCM)๋Š” ๋‹ค์Œ๊ณผ ๊ฐ™๋‹ค. - - LCM = (a * b) / GCD - - ### **โ–บ ์‚ฌ์†Œํ•œ ํ…Œํฌ๋‹‰** - - ### **โ—ผ๏ธŽ ์†Œ์ˆ˜์  ์˜ฌ๋ฆผ ์—ฐ์‚ฐ(ceil)** - id:: 68725357-aae4-4805-9550-21927cf3731a - - ๋Œ€๋ถ€๋ถ„์˜ ์–ธ์–ด์—๋Š” ceil์ด๋ผ๋Š” ์˜ฌ๋ฆผ์—ฐ์‚ฐ ๋ฉ”์„œ๋“œ๋ฅผ ์ง€์›ํ•˜์ง€๋งŒ ์‚ฌ์šฉํ•  ์ˆ˜ ์—†๋Š” ํ™˜๊ฒฝ์ผ ๊ฒฝ์šฐ์—๋Š” ๋‹ค์Œ๊ณผ ๊ฐ™์ด ๊ณ„์‚ฐํ•œ๋‹ค. - - ```python - ceil(x/y) = (x+y-1)//y - ``` - - \ No newline at end of file diff --git a/logseq/.recycle/pages_๐Ÿ‘ฉ๐Ÿปโ€๐Ÿ’ปแ„แ…ฉแ„ƒแ…ตแ†ผ แ„แ…ตแ†ธ แ„แ…ฉแ„ƒแ…ณ แ„†แ…ฉแ„‹แ…ณแ†ท_แ„‹แ…ตแ„Œแ…ฅแ†ซ.md b/logseq/.recycle/pages_๐Ÿ‘ฉ๐Ÿปโ€๐Ÿ’ปแ„แ…ฉแ„ƒแ…ตแ†ผ แ„แ…ตแ†ธ แ„แ…ฉแ„ƒแ…ณ แ„†แ…ฉแ„‹แ…ณแ†ท_แ„‹แ…ตแ„Œแ…ฅแ†ซ.md deleted file mode 100755 index 3cf20d5..0000000 --- a/logseq/.recycle/pages_๐Ÿ‘ฉ๐Ÿปโ€๐Ÿ’ปแ„แ…ฉแ„ƒแ…ตแ†ผ แ„แ…ตแ†ธ แ„แ…ฉแ„ƒแ…ณ แ„†แ…ฉแ„‹แ…ณแ†ท_แ„‹แ…ตแ„Œแ…ฅแ†ซ.md +++ /dev/null @@ -1 +0,0 @@ -- \ No newline at end of file diff --git a/logseq/.recycle/pages_๐Ÿ‘ฉ๐Ÿปโ€๐Ÿ’ปแ„แ…ฉแ„ƒแ…ตแ†ผ แ„แ…ตแ†ธ แ„แ…ฉแ„ƒแ…ณ แ„†แ…ฉแ„‹แ…ณแ†ท_แ„‹แ…ตแ„Œแ…ฅแ†ซแ„‹แ…ตแ„Œแ…ฅแ†ซ.md b/logseq/.recycle/pages_๐Ÿ‘ฉ๐Ÿปโ€๐Ÿ’ปแ„แ…ฉแ„ƒแ…ตแ†ผ แ„แ…ตแ†ธ แ„แ…ฉแ„ƒแ…ณ แ„†แ…ฉแ„‹แ…ณแ†ท_แ„‹แ…ตแ„Œแ…ฅแ†ซแ„‹แ…ตแ„Œแ…ฅแ†ซ.md deleted file mode 100755 index 293ed15..0000000 --- a/logseq/.recycle/pages_๐Ÿ‘ฉ๐Ÿปโ€๐Ÿ’ปแ„แ…ฉแ„ƒแ…ตแ†ผ แ„แ…ตแ†ธ แ„แ…ฉแ„ƒแ…ณ แ„†แ…ฉแ„‹แ…ณแ†ท_แ„‹แ…ตแ„Œแ…ฅแ†ซแ„‹แ…ตแ„Œแ…ฅแ†ซ.md +++ /dev/null @@ -1,31 +0,0 @@ -## **โ– ํ”„๋กœ๊ทธ๋ž˜๋ฐ ๊ด€๋ จ ์ด๋ก  ์ •๋ฆฌ** - - ### **โ–บ ์•Œ๊ณ ๋ฆฌ์ฆ˜** - - ### **โ—ผ๏ธŽ ์œ ํด๋ฆฌ๋“œ ํ˜ธ์ œ๋ฒ•(์ตœ์†Œ๊ณต๋ฐฐ์ˆ˜, ์ตœ๋Œ€๊ณต์•ฝ์ˆ˜ ๊ตฌํ•˜๊ธฐ)** - - โ—‰ **์ตœ๋Œ€๊ณต์•ฝ์ˆ˜(GCD) ๊ตฌํ•˜๊ธฐ** - id:: 687253f3-7eb2-421e-b8c0-d9b96d4d7323 - - ์ž…๋ ฅํ•œ ๋‘ ์ˆ˜์˜ ์ตœ๋Œ€๊ณต์•ฝ์ˆ˜๋ฅผ ๊ตฌํ•˜๋Š” ํ•จ์ˆ˜ GCD์—์„œ ์•„๋ž˜์˜ ๋‘ ๊ณต์‹์ด ์„ฑ๋ฆฝํ•œ๋‹ค. - - GCD(a, b) = GCD(b, a % b) - - GCD(a, 0) = a - - ์œ„์˜ ๊ณต์‹์„ ๋ฐ”ํƒ•์œผ๋กœ ๋‹ค์Œ์˜ ๊ณผ์ •์„ ํ†ตํ•ด ์ตœ๋Œ€๊ณต์•ฝ์ˆ˜๋ฅผ ๊ตฌํ•œ๋‹ค.(a>=b) - - 1. r = a%b - - 2. a-b, b=r ๋กœ ๊ฐ’ ๊ฐฑ์‹  - - 3. b = 0์ด๋ฉด, a๊ฐ€ ์ตœ๋Œ€๊ณต์•ฝ์ˆ˜ - - 4. b != 0์ด๋ฉด ๋‹ค์‹œ 1๋ฒˆ๋ถ€ํ„ฐ ์‹คํ–‰ - - ์œ ํด๋ฆฌ๋“œ ํ˜ธ์ œ๋ฒ• gcd ์˜ˆ์‹œ์ฝ”๋“œ - id:: 687255f3-27a7-4bef-a684-60daab2fa33f - - ์žฌ๊ท€๋ฐฉ์‹ - - ```python - def gcd(a,b): - return a if b==0 else gcd(b, a%b) - ``` - - ๋ฐ˜๋ณต๋ฌธ ๋ฐฉ์‹ - - ```python - def gcd(a,b): - while b: - a, b = b, a%b - return a - ``` - - โ—‰ **์ตœ์†Œ๊ณต๋ฐฐ์ˆ˜(LCM) ๊ตฌํ•˜๊ธฐ** - id:: 687256b1-be35-4052-a12e-133e2c3b2f50 - - ๋‘ ์ˆ˜ a,b์™€ ๊ทธ ์ˆ˜์˜ ์ตœ๋Œ€๊ณต์•ฝ์ˆ˜(GCD)๋ฅผ ์•Œ๋ฉด a,b์˜ ์ตœ์†Œ๊ณต๋ฐฐ์ˆ˜(LCM)๋Š” ๋‹ค์Œ๊ณผ ๊ฐ™๋‹ค. - - LCM = (a * b) / GCD \ No newline at end of file diff --git a/pages/๐Ÿ‘ฉ๐Ÿปโ€๐Ÿ’ปแ„แ…ฉแ„ƒแ…ตแ†ผ แ„Œแ…ตแ„‰แ…ตแ†จ_แ„แ…ตแ†ธ แ„Œแ…ฅแ†ผแ„…แ…ต.md b/pages/๐Ÿ‘ฉ๐Ÿปโ€๐Ÿ’ปแ„แ…ฉแ„ƒแ…ตแ†ผ แ„Œแ…ตแ„‰แ…ตแ†จ_แ„แ…ตแ†ธ แ„Œแ…ฅแ†ผแ„…แ…ต.md deleted file mode 100755 index edd5374..0000000 --- a/pages/๐Ÿ‘ฉ๐Ÿปโ€๐Ÿ’ปแ„แ…ฉแ„ƒแ…ตแ†ผ แ„Œแ…ตแ„‰แ…ตแ†จ_แ„แ…ตแ†ธ แ„Œแ…ฅแ†ผแ„…แ…ต.md +++ /dev/null @@ -1,10 +0,0 @@ -- [[javascript_typescript]] -- [[Python]] -- [[C]] -- [[Swift]] -- [[Java]] -- [[์ž๋ฃŒ๊ตฌ์กฐ]] -- [[์•Œ๊ณ ๋ฆฌ์ฆ˜]] -- [[์ฝ”๋”ฉํŒ]] -- -- [[์ฝ”๋”ฉ๋ฌธ์ œ ๋ณต์Šต์šฉ]] \ No newline at end of file diff --git a/pages/๐Ÿ“šแ„Œแ…ฅแ†ซแ„€แ…ฉแ†ผแ„€แ…ฉแ†ผแ„‡แ…ฎ.md b/pages/๐Ÿ“š์ „๊ณต๊ณต๋ถ€.md similarity index 100% rename from pages/๐Ÿ“šแ„Œแ…ฅแ†ซแ„€แ…ฉแ†ผแ„€แ…ฉแ†ผแ„‡แ…ฎ.md rename to pages/๐Ÿ“š์ „๊ณต๊ณต๋ถ€.md diff --git a/pages/๐Ÿ”ค แ„‹แ…งแ†ผแ„‹แ…ฅแ„€แ…ฉแ†ผแ„‡แ…ฎ.md b/pages/๐Ÿ”ค แ„‹แ…งแ†ผแ„‹แ…ฅแ„€แ…ฉแ†ผแ„‡แ…ฎ.md deleted file mode 100755 index c6a31c8..0000000 --- a/pages/๐Ÿ”ค แ„‹แ…งแ†ผแ„‹แ…ฅแ„€แ…ฉแ†ผแ„‡แ…ฎ.md +++ /dev/null @@ -1,5 +0,0 @@ -- [[์˜์–ด๊ธฐ์ดˆ๊ฐ•์˜(์„ฑ์ •ํ˜œ)]] -- [[ํ•ด์ปค์Šค ์ฒซํ† ์ต]] -- [[ํ† ์ต ๋ชจ์˜๋ฌธ์ œ ์˜ค๋‹ต๋…ธํŠธ]] -- [[ํ† ์ตํŒ ๋ชจ์Œ]] -- [[๋ถ€๋ก]] \ No newline at end of file