배우기를 멈추는 사람은 20세건 80세건 늙은 것이다.

pd.merge(frame_1, frame_2, left_on='county_ID', right_on='countyid') frame_1.merge(frame_2, left_on='county_ID', right_on='countyid') https://stackoverflow.com/questions/20375561/joining-pandas-dataframes-by-column-names Joining pandas DataFrames by Column names I have two DataFrames with the following column names: frame_1: event_id, date, time, county_ID frame_2: countyid, state I would like t..

데이터베이스의 데이터를 읽을 때 보통 칼럼단위의 데이터를 이용하는 경우가 많습니다. ORC는 칼럼단위로 데이터를 저장하기 때문에 칼럼의 데이터를 찾는 것이 빠르고, 압축효율이 좋습니다. https://wikidocs.net/23570 2-ORC ORC(Optimized Row Columnar)는 칼럼 기반의 파일 저장방식으로, Hadoop, Hive, Pig, Spark등에 적용가능합니다. 데이터베이스의 데이터를 ... wikidocs.net

java -Denviroment=dev -jar myjar.jar https://stackoverflow.com/questions/29811377/how-to-pass-system-properties-to-a-jar-file How to pass system properties to a jar file I have a main class that expects certain properties that I pass using the -D option. I can access this in my IDE by sending them as VM options. I package this application into a jar file using Mav... stackoverflow.com

df.groupby('a').agg({'b':lambda x: list(x)}) https://stackoverflow.com/questions/22219004/how-to-group-dataframe-rows-into-list-in-pandas-groupby How to group dataframe rows into list in pandas groupby I have a pandas data frame df like: a b A 1 A 2 B 5 B 5 B 4 C 6 I want to group by the first column and get second column as lists in rows: A [1,2] B [5,5,4] C [6] Is it possible to do somethin.....

zone=$(date +%z) datetime=$(date +%Y-%m-%dT%H:%M:%S) iso=$datetime${zone:0:3}:${zone:3:2} echo $iso 2022-08-06T06:46:18+09:00 https://www.vankuik.nl/2019-04-23_ISO_date_on_macOS vankuik.nl: 2019-04-23 ISO date on macOS To print the current date in ISO 8601 format on macOS: $ date +%Y-%m-%dT%H:%M:%S 2019-04-23T14:44:46 To print it with the timezone information, append %z. $ date +%Y-%m-%dT%H:%M:%..

A sealed class is "an extension of enum classes". They can exist in multiple instances that contain state while each enum constant exists only as a single instance. Since, in your example, you don't need the values to be instantiated multiple times and they don't provide special behavior, enums should just be right for the use case. https://stackoverflow.com/questions/49169086/sealed-class-vs-en..

https://trunkbaseddevelopment.com/ Trunk Based Development Introduction One line summary A source-control branching model, where developers collaborate on code in a single branch called ‘trunk’ *, resist any pressure to create other long-lived development branches by employing documented techniques. They there trunkbaseddevelopment.com

for idx, x in enumerate(xs): print(idx, x) https://stackoverflow.com/questions/522563/accessing-the-index-in-for-loops Accessing the index in 'for' loops How do I access the index in a for loop? xs = [8, 23, 45] for x in xs: print("item #{} = {}".format(index, x)) Desired output: item #1 = 8 item #2 = 23 item #3 = 45 stackoverflow.com https://codechacha.com/ko/python-for-loop-with-index/ Python ..

https://stackoverflow.com/questions/70422980/logback-spring-is-unable-to-read-property-value-from-application-yml logback-spring. is unable to read property value from application.yml My logback-spring.xml reads fine from application.properties but not from application.yml. In my project, we have been asked to only use the YAML format as this format is being used in other stackoverflow.com