배우기를 멈추는 사람은 20세건 80세건 늙은 것이다.

try: b = a[4] except IndexError: b = 'sss' [reference] https://stackoverflow.com/questions/2574636/getting-a-default-value-on-index-out-of-range-in-python

profile = webdriver.FirefoxProfile() profile.set_preference("browser.cache.disk.enable", False) profile.set_preference("browser.cache.memory.enable", False) profile.set_preference("browser.cache.offline.enable", False) profile.set_preference("network.http.use-cache", False) driver = webdriver.Firefox(profile) [reference] https://stackoverflow.com/questions/18378331/clear-firefox-cache-in-seleniu..

from selenium import webdriver firefox_profile = webdriver.FirefoxProfile() firefox_profile.set_preference("browser.privatebrowsing.autostart", True) driver = webdriver.Firefox(firefox_profile=firefox_profile) [reference] https://stackoverflow.com/questions/27425116/python-start-firefox-with-selenium-in-private-mode

var maxSpeed = { car: 300, bike: 60, motorbike: 200, airplane: 1000, helicopter: 400, rocket: 8 * 60 * 60 }; var sortable = []; for (var vehicle in maxSpeed) { sortable.push([vehicle, maxSpeed[vehicle]]); } sortable.sort(function(a, b) { return a[1] - b[1]; }); //[["bike", 60], ["motorbike", 200], ["car", 300], //["helicopter", 400], ["airplane", 1000], ["rocket", 28800]] [reference] https://sta..

function sortNumber(a, b) { return a - b; } var numArray = [140000, 104, 99]; numArray.sort(sortNumber); console.log(numArray); [reference] https://stackoverflow.com/questions/1063007/how-to-sort-an-array-of-integers-correctly

function onlyUnique(value, index, self) { return self.indexOf(value) === index; } // usage example: var a = ['a', 1, 'a', 2, '1']; var unique = a.filter( onlyUnique ); // returns ['a', 1, 2, '1'] https://stackoverflow.com/questions/1960473/get-all-unique-values-in-a-javascript-array-remove-duplicates Get all unique values in a JavaScript array (remove duplicates) I have an array of numbers that ..

[item for item in x if item not in y] [reference] https://stackoverflow.com/questions/3428536/python-list-subtraction-operation

list = ["1","10","3","22","23","4","2","200"] list = [int(x) for x in list] list.sort() [reference] https://stackoverflow.com/questions/3426108/how-to-sort-a-list-of-strings-numerically

[출처] https://stackoverflow.com/questions/58620656/a-cookie-associated-with-a-resource-at-http-doubleclick-net-was-set-with-sam

data1 = [1, 2, 3] data2 = [4, 5, 6] data = data1 + data2 print(data) # output : [1, 2, 3, 4, 5, 6] [출처] https://stackoverflow.com/questions/46866105/how-do-i-merge-arrays-in-python

미래의 나에게... MongoDB sudo mongod --smallfiles mongo > Redis redis-server redis-cli >

1. 마지막으로 딱 한가지만 먹을 수 있다면 뭘 먹고싶어요? 2. 돈 걱정 없이 여행을 할 수 있다면 가고 싶은 곳 3. 인생에서 제일 처음 본 영화 4. 구독자가 오르는 알간지를 보며 드는 생각은? 5. 알맹쓰가 생각하는 가장 완벽한 하루는? 6. 돈과 명예 중 어떤 것을 선택하시겠어요? 7. 나를 가장 상처줬던 사람은 누구이고 그 사람은 어떻게 알맹쓰에게 상처를 줬나요? 8. 마지막으로 언제 왜 울었나요? 9. 꿈이 뭔가요? 10. 알간지 영상 중 가장 맘에 드는 영상은? 11. 딱 한가지 노래만 추천해줄 수 있다면 어떤 노래를 추천해주고 싶으세요? 12. 과거로 돌아가고 싶으신가요? 돌아가고 싶다면 언제인가요? 13. 미래를 보고 싶은가요? 돈, 건강, 사랑 어떤 것을 보고 싶은가요? 14. 알간지..

https://www.epochconverter.com/

http://seb.kr/unicode/

chrome.tabs.getSelected(null, (tab) => { console.log(tab.id); console.log(tab.url); }); [출처] https://stackoverflow.com/questions/6132018/how-can-i-get-the-current-tab-url-for-chrome-extension

# vi .zshrc alias ngrok="/usr/local/lib/node_modules/node/lib/node_modules/node/lib/node_modules/ngrok/bin/ngrok" [출처] https://stackoverflow.com/questions/30188582/ngrok-command-not-found https://github.com/bubenshchykov/ngrok

### Use a subquery SELECT * FROM (SELECT * FROM t1) a UNION ALL SELECT * FROM (SELECT * FROM t2) b; [출처] https://stackoverflow.com/questions/56777440/hive-cant-perform-union-query-with-limit

Date original = new Date(); Date copy = new Date(original.getTime()); [출처] https://stackoverflow.com/questions/28332484/is-there-a-way-to-copy-date-object-into-another-date-object-without-using-a-refe

# Located before location / {} # inner HTTP # inner HTTPS server { listen 80; server_name localhost; error_page 405 =200 $uri; location / {} } server { listen 443; server_name localhost; error_page 405 =200 $uri; location / {} } [출처] https://stackoverflow.com/questions/24415376/post-request-not-allowed-405-not-allowed-nginx-even-with-headers-included

int a = 3; int b = 10; a = a ^ b; b = b ^ a; a = a ^ b; [출처] https://en.wikipedia.org/wiki/XOR_swap_algorithm

ALTER TABLE t ADD (a VARCHAR2(1) default 'N'); ALTER TABLE t MODIFY (a VARCHAR2(1) default 'N'); ALTER TABLE t DROP a; [출처] https://majesty76.tistory.com/27

UPDATE A SET value = ( SELECT value FROM B WHERE B.id = A.id ); DELETE FROM A WHERE EXISTS ( SELECT 1 FROM B WHERE A.id = B.id ); [출처] https://tora-it-kingdom.tistory.com/10

@Async is not a silver bullet only public don't call self-invocation 비슷한 경험 @AOP 로 선언된 메소드는 같은 클래스에서 호출할 경우 정상적으로 작동하지 않는다. 따라서 @AOP 메소들간 호출이 필요한 경우, 서로다른 클래스로 정의해야만 한다. 좀더 학습 후 내용 보완 해야함..! [출처] https://jeong-pro.tistory.com/187

Hadoop Export $ bin/hadoop jar export \ [ [ []] Import $ bin/hadoop jar import \ Hbase Export $ bin/hbase org.apache.hadoop.hbase.mapreduce.Export \ [ [ []]] Import $ bin/hbase org.apache.hadoop.hbase.mapreduce.Import \ [출처] https://stackoverflow.com/questions/25909132/how-to-import-export-hbase-data-via-hdfs-hadoop-commands

{5:"djdj", 6:"8899", 7:"998kdj"} [v for k,v in mydict.items() if k >= 6] [출처] https://stackoverflow.com/questions/4181367/how-to-to-filter-dict-to-select-only-keys-greater-than-a-value