배우기를 멈추는 사람은 20세건 80세건 늙은 것이다.

cat * > merged https://unix.stackexchange.com/questions/3770/how-to-merge-all-text-files-in-a-directory-into-one How to merge all (text) files in a directory into one? I've got 14 files all being parts of one text. I'd like to merge them into one. How to do that? unix.stackexchange.com

if [ "$#" -eq 2 ] then echo "Its works!" else echo "need to two params" exit 1 fi https://stackoverflow.com/questions/4341630/checking-for-the-correct-number-of-arguments Checking for the correct number of arguments How do i check for the correct number of arguments (one argument). If somebody tries to invoke the script without passing in the correct number of arguments, and checking to make sur..

https://vue-loader-v14.vuejs.org/kr/features/scoped-css.html 범위 CSS · vue-loader 범위를 가지는 CSS 태그가 scoped 속성을 가지고있을 때, CSS는 현재 컴포넌트의 엘리먼트에만 적용됩니다. 이는 Shadow DOM에 있는 스타일 캡슐화와 유사합니다. 여기에는 몇 가지 주의사항이 있지만 vue-loader-v14.vuejs.org

DROP DATABASE IF EXISTS `name` DROP TABLE IF EXISTS `name` http://tcpschool.com/mysql/mysql_basic_drop 코딩교육 티씨피스쿨 4차산업혁명, 코딩교육, 소프트웨어교육, 코딩기초, SW코딩, 기초코딩부터 자바 파이썬 등 tcpschool.com

title ```java String test = "test"; ``` https://gist.github.com/pierrejoubert73/902cc94d79424356a8d20be2b382e1ab How to add a collapsible section in markdown. How to add a collapsible section in markdown. GitHub Gist: instantly share code, notes, and snippets. gist.github.com https://gist.github.com/ericclemmons/b146fe5da72ca1f706b2ef72a20ac39d HTML5 in GitHub HTML5 in GitHub. GitHub Gist: insta..

Environment VariableDescriptionEnvironment VariableDescription BUILD_NUMBER The current build number, such as "153" BUILD_ID The current build id, such as "2005-08-22_23-59-59" (YYYY-MM-DD_hh-mm-ss, defunct since version 1.597) BUILD_URL The URL where the results of this build can be found (e.g. http://buildserver/jenkins/job/MyJobName/666/) NODE_NAME The name of the node the current build is ru..

Understanding StringUtils.join performance decisions Understanding StringUtils.join performance decisions I was looking at the implementation of Apache Commons' StringUtils.join method and stumbled upon a line I assume is thought for performance but I don't understand why they did it the way it is, with stackoverflow.com

import static java.nio.charset.StandardCharsets.*; byte[] ptext = subject.getBytes(ISO_8859_1); subject = new String(subject, UTF_8); mail.setSubject(subject); https://stackoverflow.com/questions/5729806/encode-string-to-utf-8 Encode String to UTF-8 I have a String with a "ñ" character and I have some problems with it. I need to encode this String to UTF-8 encoding. I have tried it by this way, ..

--conf "spark.executor.extraJavaOptions=-Dlog4j.configuration=log4j.xml -Dfile.encoding=utf-8" https://stackoverflow.com/questions/41203431/configuring-spark-logging-with-log4j-xml Configuring Spark logging with log4j.xml I guesss its a silly question, but I couldnt find answer anywhere. Can I configure logging in spark using log4j.xml? In spark documentation its mentioned you can configure logg..

[137,80,78,71,13,10,26,10,0,...] var imgsrc = "data:image/png;base64," + btoa(String.fromCharCode.apply(null, new Uint8Array([137,80,78,71,13,10,26,10,0,...]))); document.getElementById('image').src = imgsrc; https://stackoverflow.com/questions/4564119/how-to-convert-a-byte-array-into-an-image How to convert a byte array into an image? Using Javascript, I'm making an AJAX call to a WCF service, ..

const obj = {}; const arr = []; function isEmpty(param) { return Object.keys(param).length === 0; } console.log(isEmpty(obj)); // true console.log(isEmpty(arr)); // true const obj = {}; const arr = []; function isEmptyObject(param) { return Object.keys(param).length === 0 && param.constructor === Object; } console.log(isEmptyObject(obj)); // true console.log(isEmptyObject(arr)); // false https:/..

mvn spring-boot:run -Drun.jvmArguments="-Xms4048m -Xmx8096m" https://stackoverflow.com/questions/23072187/how-can-i-configure-the-heap-size-when-starting-a-spring-boot-application-with-e How can I configure the heap size when starting a Spring Boot application with embedded Tomcat? I am trying to deploy a Spring Boot powered web app to production. The app is built with Spring Boot 1.0.1 and has ..

_.uniqBy(data, function (e) { return e.id; }); _.uniqBy(data, 'id'); https://stackoverflow.com/questions/31740155/lodash-remove-duplicates-from-array Lodash remove duplicates from array This is my data: [ { url: 'www.example.com/hello', id: "22" }, { url: 'www.example.com/hello', id: "22" }, { url: 'www.example.com/ stackoverflow.com

HADOOP_USER_NAME=$user $SPARK_HOME/bin/spark-submit \ --master yarn-cluster \ --driver-memory 32g \ --driver-cores 4 \ --executor-memory 19g \ --executor-cores 5 \ --num-executors 17 \ --conf spark.shuffle.service.enabled=true \ --conf spark.dynamicAllocation.enabled=true \ --conf spark.dynamicAllocation.minExecutors=5 \ --conf spark.dynamicAllocation.maxExecutors=100 \ --conf spark.dynamicAlloc..

chrome.tabs.getSelected(null, function(tab) { var code = 'window.location.reload();'; chrome.tabs.executeScript(tab.id, {code: code}); }); https://stackoverflow.com/questions/8342756/chrome-extension-api-for-refreshing-the-page chrome extension API for refreshing the page Is there an API to programmatically refresh the current tab from inside a browser action button? I have background page confi..

window.scrollTo(0, document.body.scrollHeight); window.scrollTo(0, 0); https://stackoverflow.com/questions/11715646/scroll-automatically-to-the-bottom-of-the-page Scroll Automatically to the Bottom of the Page Consider I have a list of questions. When I click on the first question, it should automatically take me to the bottom of the page. For a matter of fact, I do know that this can be done us..

create 'tb', {'NAME' => 'cf','TTL' => 20} alter 'tb', {'NAME' => 'cf','TTL' => 20} # TTL 20s https://dwgeek.com/automatically-delete-hbase-row-time-live-settings.html/ Automatically Delete HBase row – Time to Live (TTL) Settings - DWgeek.com Automatically Delete HBase row – Time to Live Settings, automatically expire the HBase row, HBase Time to Live (TTL) Option, Automatically Delete HBase Row ..

SELECT current_timestamp() AS current_timestamp, (current_timestamp() - INTERVAL '6' HOUR) AS current_timestamp_minus_six_hours https://stackoverflow.com/questions/45242173/how-to-add-hours-to-datetime-in-zeppelin-spark-sql How to add hours to Datetime in Zeppelin Spark Sql I have a query with a column that converts the universal datetime field (not a timestamp) to a local time based on the the ..

import locale locale.setlocale(locale.LC_TIME,'ko_KR.UTF-8') http://gonigoni.kr/posts/python-datetime-string-formatting/ Python 날짜/시간을 문자열로 만들기 위한 규칙 정리 - GoniGoni! 파이썬을 쓰다 보면 문자열을 다루는 경우가 많은데, 문자열을 특정한 양식에 맞추어야 하는 경우가 종종 있었다. 이 경우 PyFormat과 같은 사이트를 참조한다. 하지만 날짜나 시간을 formatting 할 �� gonigoni.kr

mvn dependency:tree https://stackoverflow.com/questions/53309378/class-path-contains-multiple-slf4j-bindings-exclusion-not-working Class path contains multiple SLF4J bindings, exclusion not working, I get the following error: SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/C:/Users/Vash/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-.....