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๊ณต๋ถ€/JS (16)
[JS] Deep Equality checking of Two Objects

JSON.stringify ์„ ์‚ฌ์šฉํ•˜์ง€ ์•Š๊ณ  ๋‘ Object๊ฐ€ ๊ฐ™์€์ง€ ๋น„๊ต(deep-equal) Deep Equality checking of Two Objects function compareObjectsDeepEqual(original, target) { const isObject = obj => typeof obj === "object" && obj !== null; if (!isObject(original) || !isObject(target)) { return original === target; } const keysOfOriginal = Object.keys(original); const keysOfTarget = Object.keys(target); if (keysOfOriginal.len..

๊ณต๋ถ€/JS 2020. 9. 20. 02:26
[JS/์•Œ๊ณ ๋ฆฌ์ฆ˜] Sort Colors : Dutch national flag problem

Dutch national flag problemarray[0] ~ [low-1] zeros (red) array[low] ~ [mid-1] onew (white) array[mid] ~ [high] unknown array[high+1] ~ [length-1] twos (blue)์ฒ˜์Œ์— ๋ชจ๋“  ์š”์†Œ๋Š” unknown ์ƒํƒœ์ด๊ธฐ ๋•Œ๋ฌธ์— low = 0mid = 0high = length-1์ด๋‹ค. 75. Sort ColorsGiven an array with n objects colored red, white or blue, sort them in-place so that objects of the same color are adjacent, with the colors in the order red, white..

๊ณต๋ถ€/JS 2020. 9. 7. 09:16
[JS/์•Œ๊ณ ๋ฆฌ์ฆ˜] Find First and Last Position of Element in Sorted Array

BST ์ด๋ฏธ sorted ๋œ ๋ฐ์ดํ„ฐ์˜ ๊ฒฝ์šฐ, BST๋ฅผ ์ด์šฉํ•ด O(log n)์˜ ์‹œ๊ฐ„๋ณต์žก๋„๋กœ ํƒ€๊ฒŸ์„ ์ฐพ์„ ์ˆ˜ ์žˆ๋‹ค. 34. Find First and Last Position of Element in Sorted Array Given an array of integers nums sorted in ascending order, find the starting and ending position of a given target value. Your algorithm's runtime complexity must be in the order of O(log n). If the target is not found in the array, return [-1, -1]. Example 1: Input: nums =..

๊ณต๋ถ€/JS 2020. 9. 7. 07:29
[JS/์•Œ๊ณ ๋ฆฌ์ฆ˜] Merge Two Sorted Lists

Linked List + Merge SortMerge sort์˜ ๊ธฐ๋ณธ๊ฐœ๋…์€ Divide and conquer์ด๋‹ค. ๋”ฐ๋ผ์„œ Quick sort์™€ ๋งˆ์ฐฌ๊ฐ€์ง€๋กœ ์žฌ๊ท€๋ฅผ ํ†ตํ•ด ๊ตฌํ˜„ ํ•  ์ˆ˜ ์žˆ๋‹ค. ์ด๋ฏธ ์ •๋ ฌ๋œ ๋‘ ํŒŒํ‹ฐ์…˜๋“ค์ด ์žˆ๋‹ค๋ฉด, ๋‘ ํŒŒํ‹ฐ์…˜์˜ ์ฒซ์š”์†Œ๋ฅผ ๊ฒ€์‚ฌํ•˜์—ฌ ๋” ์ž‘์€ ์š”์†Œ๋ฅผ ๋บ€๋‹ค.Linked List ์™€ ์—ฐ๊ฒฐํ•˜์—ฌ์„œ ํ‘ธ๋Š” ๋ฌธ์ œ์ด๊ธฐ๋•Œ๋ฌธ์— ๋” ์ž‘์€ ์š”์†Œ๋ฅผ ๊ฐ€์ง€๊ณ  ์žˆ๋Š” ๋ง๋ฆฌ๋ฅผ ํ—ค๋“œ๋กœ ์‚ผ๊ณ , ํ—ค๋“œ๋กœ ์‚ผ์€ ๋ง๋ฆฌ์˜ ๋‹ค์Œ ๋…ธ๋“œ์™€, ํ—ค๋“œ๊ฐ€ ๋˜์ง€๋ชปํ•œ ๋ง๋ฆฌ ๋‘๊ฐ€์ง€๋ฅผ ๋‹ค์‹œ ํ•จ์ˆ˜์— ๋„ฃ๋Š”๋‹ค.21. Merge Two Sorted ListsMerge two sorted linked lists and return it as a new sorted list.The new list should be made by splicing together..

๊ณต๋ถ€/JS 2020. 9. 7. 06:51
[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
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