배우기를 멈추는 사람은 20세건 80세건 늙은 것이다.

https://spark.apache.org/docs/3.0.0-preview/sql-ref-syntax-aux-show-tables.html SHOW TABLES - Spark 3.0.0-preview Documentation You are using an outdated browser. Upgrade your browser today or install Google Chrome Frame to better experience this site. Overview Programming Guides API Docs Deploying More v3.0.0-preview --> spark.apache.org

@ToString(callSuper=true, includeFieldNames=false) public String csv() { String name = this.toString(); name = name.replace(MergeResult.class.getSimpleName(), ""); name = name.substring(1, name.length()-1); name = name.replaceAll(CommonUtils.DELIMITER+" ", CommonUtils.DELIMITER); return name; } public static String fields() { return Arrays.stream(MergeResult.class.getDeclaredFields()) .map(Field..

import os from flask import Flask,redirect app = Flask(__name__) @app.route('/') def hello(): return redirect("http://www.example.com", code=302) if __name__ == '__main__': # Bind to PORT if defined, otherwise default to 5000. port = int(os.environ.get('PORT', 5000)) app.run(host='0.0.0.0', port=port) https://stackoverflow.com/questions/14343812/redirecting-to-url-in-flask Redirecting to URL in ..

from datetime import timedelta, date KST = date.today() + timedelta(hours=9) https://stackoverflow.com/questions/6871016/adding-5-days-to-a-date-in-python Adding 5 days to a date in Python I have a date "10/10/11(m-d-y)" and I want to add 5 days to it using a Python script. Please consider a general solution that works on the month ends also. I am using following code: import re from stackoverfl..

yum install -y python3-devel.x86_64 https://stackoverflow.com/questions/43047284/how-to-install-python3-devel-on-red-hat-7 How to install python3-devel on red hat 7 I am trying to install something in my virtual environment, which uses anaconda python 3.6. I get the gcc failed with exit status 1, hinting on the absence of the right python3-devel package, as stackoverflow.com

https://stackoverflow.com/questions/11704327/how-to-optimize-imports-automatically-after-each-save-in-intellij-idea How to optimize imports automatically after each save in IntelliJ IDEA I want to learn how can I automatically optimize imports after each save as we do Eclipse(save actions). stackoverflow.com

ALTER TABLE table1 ADD COLUMN foo INT DEFAULT 0; https://stackoverflow.com/questions/3569347/adding-a-new-sql-column-with-a-default-value Adding a new SQL column with a default value I am looking for the syntax to add a column to a MySQL database with a default value of 0 Reference stackoverflow.com

### AS-IS DELETE FROM cwd_group WHERE id IN (SELECT DISTINCT a.id ext_id FROM cwd_group a JOIN cwd_group b ON a.group_name=b.group_name JOIN cwd_directory d ON d.id=a.directory_id WHERE a.directory_id != b.directory_id AND directory_name = 'My JIRA Server'); ### TO-BE DELETE FROM cwd_group WHERE id IN (SELECT ext_id FROM (SELECT DISTINCT a.id ext_id FROM cwd_group a JOIN cwd_group b ON a.group_n..

UPDATE table_name SET field = REPLACE(field, 'foo', 'bar') WHERE INSTR(field, 'foo') > 0; https://stackoverflow.com/questions/125230/mysql-search-and-replace-some-text-in-a-field MySQL search and replace some text in a field What MySQL query will do a text search and replace in one particular field in a table? I.e. search for foo and replace with bar so a record with a field with the value hello..

brew update brew tap mongodb/brew brew install mongodb-community@4.0 brew services start mongodb-community@4.0 ~/.zshrc export PATH="$PATH:/usr/local/Cellar/mongodb-community@4.0/4.0.18/bin" https://velog.io/@rosewwross/MongoDB-%EC%B4%88%EA%B8%B0%EC%84%A4%EC%A0%95-%EB%B0%8F-%EC%BF%BC%EB%A6%AC%EB%AC%B8-%EC%A0%95%EB%A6%AC (MongoDB) 초기설정 및 쿼리문 정리 설정 참고: https://treehouse.github.io/installation-guid..

https://bcho.tistory.com/1325 SRE - #1 SRE/DEVOPS의 개념과 SRE는 무엇을하는가? Site Reliability Engineering(SRE) #1 SRE/DEVOPS의 개념 조대협 (http://bcho.tistory.com) 배경 Devops는 운영팀과 개발팀을 하나의 팀으로 묶어놓고 전체적인 개발 사이클을 빠르게 하고자 하는 조직 구조이자.. bcho.tistory.com

https://stackoverflow.com/questions/37696950/spring-using-value-annotation-in-filter Spring using @Value annotation in Filter I am currently working on a Spring project and I am making a new filter that checks if a valid JWT has been sent in the request. I am running into an issue where I can't get a value from my applic... stackoverflow.com

https://2dubbing.tistory.com/36 PaaS, SaaS, IaaS 란? PaaS, SaaS, IaaS 용어는 클라우드 서비스 유형이다. 위 그림에서 파란색으로 표기되어 있는 부분이 서비스 제공업체에서 클라이언트에게 제공해주는 서비스 IaaS 란 ? 개념 Infrastructure as a Service 의 �� 2dubbing.tistory.com

https://junho85.pe.kr/1483 Jetbrains DataGrip - MySQL Timezone 접속문제 해결. Server returns invalid timezone. Go to 'Advanced' tab and set 'serverTi DataGrip에서 MySQL 서버에 접속하려고 하니 "Server returns invalid timezone. Go to 'Advanced' tab and set 'serverTimezone' property manually."가 뜨면서 DB 접속이 안되었습니다. 물론 Advanced 탭에서.. junho85.pe.kr

os.system('scrapy runspider ' + filename + ' &') https://stackoverflow.com/questions/1196074/how-to-start-a-background-process-in-python How to start a background process in Python? I'm trying to port a shell script to the much more readable python version. The original shell script starts several processes (utilities, monitors, etc.) in the background with "&". How can I stackoverflow.com

https://jekalmin.tistory.com/entry/Gson%EC%9D%84-%EC%9D%B4%EC%9A%A9%ED%95%9C-json%EC%9D%84-%EA%B0%9D%EC%B2%B4%EC%97%90-%EB%8B%B4%EA%B8%B0 -객체-변환" href="#jsonobject-->-객체-변환">JsonObject -> 객체 변환 Gson 라이브러리는 json으로 받은 데이터를 내가 만든 객체에 자동으로 set 해주는 기능을 제공한다. 먼저 간단한 JsonObject.." data-og-host="jekalmin.tistory.com" data-og-source-url="https://jekalmin.tistory.com/entry/Gson%EC%9D%84-%EC%9D%B4%EC%9A%A9..

filename = os.path.join(app.instance_path, 'dir', 'data.json') https://stackoverflow.com/questions/36649703/get-root-path-of-flask-application Get root path of Flask application I'm working on a Flask extension from which I want to create a directory in the project's root path on the file system. Suppose we have this directory structure /project /app /tests / stackoverflow.com BASE_DIR = os.path..

https://jaewoongmoon.wordpress.com/2016/08/12/%ED%97%B7%EA%B0%88%EB%A6%AC%EB%8A%94-%EB%8B%A8%EC%96%B4-marshalling-%EC%97%90-%EB%8C%80%ED%95%B4-%EC%A0%95%EB%A6%AC%ED%95%B4%EB%B3%B4%EC%9E%90/ 헷갈리는 단어 marshalling 에 대해 정리해보자. 자바 프로그래밍을 하다보면 marshalling(마셜링), unmarshalling(언마셜링) 등의 단어를 자주 접하게 되는데 확 이미지가 와닿지가 않아 조금 찾아보았다. marshal 이란 단어는 사전에서 찾아보면 명사로 jaewoongmoon.wordpress.com

new TypeToken new TypeToken(){}.getType() https://stackoverflow.com/questions/20773850/gson-typetoken-with-dynamic-arraylist-item-type Gson TypeToken with dynamic ArrayList item type I have this code: Type typeOfObjectsList = new TypeToken() {}.getType(); List objectsList = new Gson().fromJson(json, typeOfObjectsList); It convert...

String.valueOf((int) Double.parseDouble(t)) https://stackoverflow.com/questions/45734769/why-does-gson-parse-an-integer-as-a-double Why does Gson parse an Integer as a Double? A complex json string and I want to convert it to map, I have a problem. Please look at this simple test: public class Test { @SuppressWarnings("serial") public static void main(String[]... stackoverflow.com

https://stackoverflow.com/questions/40441460/does-googles-gson-use-constructors Does Google's GSON use constructors? I was wondering something when working on our project. Does the GSON API from Google use the constructors from the JSON's you want to deserialize? So for example: I've got a JSON String which I wa... stackoverflow.com

@JsonInclude(Include.NON_EMPTY) String type; https://stackoverrun.com/ko/q/4370536 java - Jackson serialization : 빈 값 무시 (또는 null) 현재 jackson 2.1.4를 사용하고 있으며 객체를 JSON 문자열로 변환 할 때 필드를 무시할 때 문제가 있습니다. 나는 그것을 변환하는 방법 public class JsonOperation { public static class Request { @JsonInclude(Include.N stackoverrun.com

https://stackoverflow.com/questions/173041/not-in-vs-not-exists NOT IN vs NOT EXISTS Which of these queries is the faster? NOT EXISTS: SELECT ProductID, ProductName FROM Northwind..Products p WHERE NOT EXISTS ( SELECT 1 FROM Northwind..[Order Details] od WHERE p. stackoverflow.com

SELECT ROW_NUMBER() OVER(ORDER BY (SELECT 0)) index, data FROM table https://www.mytecbits.com/microsoft/sql-server/row-number-without-using-order-by Row Number Without Using Order By In SQL Server | My Tec Bits How to generate row number without using ORDER By clause in SQL Server. Simple technique to override the sequence ordering while using ROW_NUMEBR() function www.mytecbits.com

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java -Xms512m -Xmx1024m JavaApp init: -Xms max: -Xmx if(memory == 32g); ### default init: 1/64 = 512m max: 1/4 = 8g java -Xms512m -Xmx8g JavaApp ### optimize init: 1/2 = 16g max: 3/4 = 24g java -Xms16g -Xmx24g JavaApp https://mkyong.com/java/find-out-your-java-heap-memory-size/ Find out your Java heap memory size - Mkyong.com - Find out your Java heap memory size mkyong.com