배우기를 멈추는 사람은 20세건 80세건 늙은 것이다.

Date.prototype.addDays = function(days) { var date = new Date(this.valueOf()); date.setDate(date.getDate() + days); return date; } var date = new Date(); console.log(date.addDays(5)); https://stackoverflow.com/questions/563406/how-to-add-days-to-date How to add days to Date? How to add days to current Date using JavaScript? Does JavaScript have a built in function like .NET's AddDay()? stackover..

const myMomentObject = moment(str, 'YYYY-MM-DD') https://stackoverflow.com/questions/22184747/parse-string-to-date-with-moment-js Parse string to date with moment.js I want to parse the following string with moment.js 2014-02-27T10:00:00 and output day month year (14 march 2014) I have been reading the docs but without success http://momentjs.com/docs/#/parsing... stackoverflow.com

@Column(name="column" , unique=true) long column @Entity @Table( name="tableName", uniqueConstraints={ @UniqueConstraint( name={"contstraintName"} columnNames={"col1", "col2"} ) } ) @Data public class Entity{ @Column(name="col1") int col1; @Column(name="col2") int col2; }

IntStream.range(0, alphabet.size()) .boxed() .collect(toMap(alphabet::get, i -> i)); https://stackoverflow.com/questions/33138577/how-to-convert-list-to-map-with-indexes-using-stream-java-8 How to convert List to Map with indexes using stream - Java 8? I've created method whih numerating each character of alphabet. I'm learning streams(functional programming) and try to use them as often as poss..

https://www.delftstack.com/ko/howto/python/check-for-nan-values-python/#math.isnan%25ED%2595%25A8%25EC%2588%2598%25EB%25A5%25BC-%25EC%2582%25AC%25EC%259A%25A9%25ED%2595%2598%25EC%2597%25AC-python%25EC%2597%2590%25EC%2584%259Cnan%25EA%25B0%2592-%25ED%2599%2595%25EC%259D%25B8 Python에서 NaN 값 확인 이 자습서에서는 Python에서 NaN 값을 확인하는 방법을 보여줍니다. www.delftstack.com

val list = mutableListOf(1, 2, 3) println(list) // [1, 2, 3] list += listOf(4, 5) println(list) // [1, 2, 3, 4, 5] https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/mutable-list-of.html mutableListOf - Kotlin Programming Language kotlinlang.org

pip3 install markupsafe==2.0.1 https://github.com/aws/aws-sam-cli/issues/3661 ImportError: cannot import name 'soft_unicode' from 'markupsafe' in Release 1.38.0 · Issue #3661 · aws/aws-sam-cli I'm building the sam project on github action and since the upgrade of sam-cli to 1.38.0, i'm getting following error when i build project Python version: 3.10.2 & 3.8.12 (Tried both ve... github.com

https://wonyong-jang.github.io/spark/2021/06/15/Spark-Serialization.html [Spark] 아파치 스파크 Serialization - SW Developer Spark를 이용하여 개발을 진행할 때 발생하는 가장 일반적인 문제 중 하나는 NotSerializableExcetpion이다. org.apache.spark.SparkException: Task not serializable at org.apache.spark.util.ClosureCleaner$.ensureSerializable(ClosureCl wonyong-jang.github.io

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

import glob print(glob.glob("/home/adam/*")) https://stackoverflow.com/questions/3207219/how-do-i-list-all-files-of-a-directory How do I list all files of a directory? How can I list all files of a directory in Python and add them to a list? stackoverflow.com

### Major - delete 시, 실제로 바로 삭제되지 않고, 삭제 표시만 추가 - region 의 column family 의 모든 HFile 를 하나로 병합하는 과정 - 7일에 한번 진행되도록 설정 - 데이터가 많으면 서버에 많은 부하가 생길 수 있어서 자주 수행하는 것은 좋지 않다. ### Minor - 작은 HFile 파일들을 하나로 합치는 과정 - HBase write -> memstore flush -> HFile - 탐색 시간 증가, 성능 저하 - merge - hbase.hstore.compaction.min: 3 - hbase.hstore.compaction.max: 10 https://dydwnsekd.tistory.com/74 HBase Compaction HBase Compac..

동일한 key 를 가진 튜플 데이터가 전부 같은 파티션, 재조정 작업 shuffle https://wooono.tistory.com/48 [Spark] Shuffle 이란? Spark Shuffle 이란? Shuffle 은 Spark 에서 데이터를 재분배하는 방법이며, 효율적인 Spark Application 을 개발하기 위해 상당히 중요한 개념입니다. Background Shuffle 을 이해하기 위해서는, reduceByKey.. wooono.tistory.com https://velog.io/@anjinwoong/Spark-%ED%8C%8C%ED%8B%B0%EC%85%98%EC%97%90-%EB%8C%80%ED%95%B4%EC%84%9C [Spark] 파티션, 셔플링에 대해서 파티션에 대해서. 데이..

https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#schedule Events that trigger workflows - GitHub Docs About events that trigger workflows Workflow triggers are events that cause a workflow to run. For more information about how to use workflow triggers, see "Triggering a workflow." Available events Some events have multiple activity types. For these events docs.gi..

import pandas as pd df = pd.read_csv("input.csv") df.to_parquet("output.parquet") https://stackoverflow.com/questions/50604133/convert-csv-to-parquet-file-using-python Convert csv to parquet file using python I am trying to convert a .csv file to a .parquet file. The csv file (Temp.csv) has the following format 1,Jon,Doe,Denver I am using the following python code to convert it into parquet from..

import org.apache.spark.sql.functions.input_file_name df.withColumn("filename", input_file_name()) https://stackoverflow.com/questions/39868263/spark-load-data-and-add-filename-as-dataframe-column Spark load data and add filename as dataframe column I am loading some data into Spark with a wrapper function: def load_data( filename ): df = sqlContext.read.format("com.databricks.spark.csv")\ .opti..

df.reset_index() https://stackoverflow.com/questions/55851802/remove-rows-of-a-dataframe-based-on-the-row-number Remove rows of a dataframe based on the row number Suppose that I have a data-frame (DF) and also I have an array like this: rm_indexes = np.array([1, 2, 3, 4, 34, 100, 154, 155, 199]) I want to remove row numbers in rm_indexes from DF. One in stackoverflow.com

Confluent Schema Registry 기본 호환성 유형은 BACKWARD BACKWARD fields 삭제 가능 optional fields 추가 가능 마지막 버전 Consumers BACKWARD_TRANSITIVE fields 삭제 가능 optional fields 추가 가능 모든 이전 버전 Consumers FORWARD fields 추가 가능 optional fields 삭제 가능 마지막 버전 Producers FORWARD_TRANSITIVE fields 추가 가능 optional fields 삭제 가능 모든 이전 버전 Producers FULL optional fields 추가 가능 optional fields 삭제 가능 마지막 버전 순서 상관 없음 FULL_TRANSITIVE opt..

https://zion830.tistory.com/71 [Kotlin] *(Star-projections)과 Any의 차이점 특정 코드를 여러 타입에 대해 재사용 하고 싶을 때, 정확히 어떤 타입이 들어오게 될 지 미리 알 수 없을 때 제네릭 타입을 사용한다. 코틀린에서 모든 타입을 받기 위해 사용하는 Any , * 가 어 zion830.tistory.com

https://lsjsj92.tistory.com/582 kubernetes helm 이란? - helm 사용법(kubernetes 배포/관리하기) 포스팅 개요 이번 포스팅은 kubernetes(쿠버네티스)의 package managing인 helm에 대해서 알아봅니다. 흔히 helm chart라고도 불리우는 helm에 대해서 간략히 알아보고, 어떻게 사용하는지를 간단한 예제 즉, lsjsj92.tistory.com

- Guest OS 유무 - Container: 하나의 커널, 독립된 공간 (by Linux kernel controll groups) https://velog.io/@kdaeyeop/%EB%8F%84%EC%BB%A4-Docker-%EC%99%80-VM%EC%9D%98-%EC%B0%A8%EC%9D%B4 도커 : Docker 와 VM의 차이 도커가 있기 이전부터 가상화 기술은 존재했었다. 당연히 도커는 기존의 가상화 기술을 기반으로 만들어졌다. 기존의 가상화 기술을 알아보고 도커와 비교해 본다면 도커를 조금 더 이해할 수 velog.io

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