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๊ณต๋ถ€ (36)
[JS] Promise.all()์€ ๋ณ‘๋ ฌ์ผ๊นŒ ์ง๋ ฌ์ผ๊นŒ๐Ÿค”

ํ•˜๋‚˜์˜ async function ๋‚ด์—์„œ๋Š” await ํ‚ค์›Œ๋“œ๋ฅผ ๋งŒ๋‚  ๋•Œ๋งˆ๋‹ค ๋ง ๊ทธ๋Œ€๋กœ ๊ธฐ๋‹ค๋ ธ๋‹ค๊ฐ€(await) ๋น„๋™๊ธฐ์ฒ˜๋ฆฌ๊ฐ€ ์™„๋ฃŒ ๋œ ํ›„ ์ง๋ ฌ๋กœ ๋‹ค์Œ task๋ฅผ ์ฒ˜๋ฆฌํ•œ๋‹ค. ๋งŒ์•ฝ์— async ๋ผ์ด๋ธŒ๋Ÿฌ๋ฆฌ๋ฅผ ๊ตฌํ˜„ํ–ˆ๋˜ ๊ณผ์ œ ์ค‘์— each๋‚˜ times ์ฒ˜๋Ÿผ ์—ฌ๋Ÿฌ ๋น„๋™๊ธฐ task๋ฅผ ๋ณ‘๋ ฌ์ ์œผ๋กœ ์‹œ์ž‘์‹œํ‚ค๋ ค๋ฉด ์–ด๋–ป๊ฒŒ ํ•ด์•ผํ• ๊นŒ? ๋งŒ์•ฝ Promise.all ๊ฐ€ ๋ณ‘๋ ฌ๋กœ ๋™์ž‘ํ•œ๋‹ค๋ฉด ์š”๊ฑธ ์“ฐ๋ฉด ๋  ๊ฒƒ ๊ฐ™๋‹ค!! ๊ทธ๋ž˜์„œ ํ•œ๋ฒˆ ํ™•์ธํ•ด๋ณด์•˜๋‹ค. โ€‹ async/await ์ง๋ ฌ์ฒ˜๋ฆฌ function nSecondsLater(n) { console.log(`๐Ÿšฉ n=${n} Start`); return new Promise((resolve, reject) => { setTimeout(() => { resolve(`โœ… ${n} Seconds Later..

๊ณต๋ถ€/JS 2020. 8. 22. 21:20
[Udemy] JavaScript: The Advanced Concepts - ์„น์…˜ 9:Asynchronous JavaScript

์„น์…˜ 9:Asynchronous JavaScript 132. Section Overview //1 setTimeout(()=>{console.log('1', 'is the loneliest number')}, 0) setTimeout(()=>{console.log('2', 'can be as bad as one')}, 10) //2 Promise.resolve('hi').then((data)=> console.log('2', data)) //3 console.log('3','is a crowd') // --output-- // 3 is a crowd // 2 hi // Promise // -- program return undefined -- // 1 is the loneliest number // se..

๊ณต๋ถ€/priv | ๊ฐ•์˜๋…ธํŠธ 2020. 8. 22. 21:18
[Udemy] JavaScript: The Advanced Concepts - ์„น์…˜ 3:Javascript Foundation II

** โš  priv | ๊ฐ•์˜๋…ธํŠธ ์นดํ…Œ๊ณ ๋ฆฌ์— ์žˆ๋Š” ๋‚ด์šฉ์€ ๋ฐœํ–‰์ด ๋ชฉ์ ์ด ์•„๋‹ˆ๊ธฐ ๋•Œ๋ฌธ์— ์ „ํ˜€ ์ •์ œ๋˜์–ด์žˆ์ง€ ์•Š์Šต๋‹ˆ๋‹น.** ์„น์…˜ 3:Javascript Foundation II 29. Execution Context Creation Phase argument object created with any arguments initializes this keyword to point called or to the global object if not specified Executing Phase Variable Environment created - memory space for variable and functions created initializes all variables to undefined and plac..

๊ณต๋ถ€/priv | ๊ฐ•์˜๋…ธํŠธ 2020. 8. 15. 02:27
[Udemy] JavaScript: The Advanced Concepts - ์„น์…˜ 15:Appendix II: Intermediate Javascript

** โš  priv | ๊ฐ•์˜๋…ธํŠธ ์นดํ…Œ๊ณ ๋ฆฌ์— ์žˆ๋Š” ๋‚ด์šฉ์€ ๋ฐœํ–‰์ด ๋ชฉ์ ์ด ์•„๋‹ˆ๊ธฐ ๋•Œ๋ฌธ์— ์ „ํ˜€ ์ •์ œ๋˜์–ด์žˆ์ง€ ์•Š์Šต๋‹ˆ๋‹น.** ์„น์…˜ 15:Appendix II: Intermediate Javascript 207. Advanced Functions Closures a function ran. the function executed. Itโ€™s never going to execute again. BUT itโ€™s going remember that there reference to those variables. so the child scope always access to the parent scope. Currying const multiply = (a,b) => a*b; const curriedMultiply = (..

๊ณต๋ถ€/priv | ๊ฐ•์˜๋…ธํŠธ 2020. 8. 13. 04:30
[JS] Prevent Stack Overflow

Exercise: Fix This Code //fill array with 60000 elements const list = new Array(60000).join('1.1').split('.'); function removeItemsFromList() { var item = list.pop(); if (item) { removeItemsFromList(); } }; removeItemsFromList(); ์œ„์˜ recursive function ์€ stack overflow ๋ฅผ ๋ฐœ์ƒ์‹œํ‚จ๋‹ค. recursive call around ๋Š” ์œ ์ง€ํ•˜๋ฉด์„œ stack overflow ๋ฅผ ํ”ผํ•˜๋ ค๋ฉด ์–ด๋–ป๊ฒŒ ๊ณ ์ณ์•ผํ• ๊นŒ? Solution Code const list = new Array(60000).join('1.1').s..

๊ณต๋ถ€/JS 2020. 8. 6. 05:53
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