Usually, java API throws exceptions when you pass null as a value but not method sort on ArrayList. The next code is totally valid, it will sort the list of Strings in the natural order package com.andrunevchyn.obvious; import java.util.ArrayList; import java.util.Set; public class NullComparatorValueTest { public static void main(String[] args)…

package com.andrunevchyn.obvious; public class CompareNullsTest { public static void main(String[] args) { System.out.println("null==null equals " + (null == null)); } } null==null equals true

Run Scrapy project in PyCharm You could call the command in Terminal scrapy crawl myspider -o output.csv or configure it like this Updated PyCharm UI

package com.andrunevchyn.obvious; public class JULMessageFormatterTest { public static void main(String[] args){ String[] parameters = {"P1", "P2"}; //single quotes block placeholder String format = "Test '{0}' {1}"; System.out.println("Single quotes: " + java.text.MessageFormat.format(format, parameters)); //but you could use escaped quotes String format2 = "Test \"{0}\" {1}"; System.out.println("Escaped quotes: " +java.text.MessageFormat.format(format2, parameters)); //but not like this it String format3 = "Test \'{0}\' {1}"; System.out.println("escaped single quotes: " +java.text.MessageFormat.format(format3, parameters)); //better use back quotes String format4 = "Test `{0}` {1}"; System.out.println("Back quotes: " +java.text.MessageFormat.format(format4, parameters)); } }

package com.andrunevchyn.obvious; import java.util.HashMap; import java.util.Map; public class NewMapTest { public static void main(String[] args){ Map<Integer, String> map = Map.of(1,"v1", 2,"v2"); //if you need copy of Map you could do like this var copyMap1 = new HashMap(map); //but copy1 doesn't keep information about types anymore so you have HashMap<Object,Object> copyMap1 //This copy of Map - copyMap2 - is much better and creates HashMap<Integer,String> copyMap2 var copyMap2 = new HashMap<>(map); //but recommended solution is copyMap3 var copyMap3 = Map.copyOf(map); } }

Java util logger uses java.text.MessageFormat as a default formatter package com.andrunevchyn.obvious; public class JULMessageFormatterTest { public static void main(String[] args){ String format = "Test {0} {1}"; String[] parameters = {"P1", "P2"}; System.out.println(java.text.MessageFormat.format(format, parameters)); } } Test P1 P2 Process finished with exit code 0

package com.andrunevchyn.obvious; import java.time.ZoneId; import java.time.ZonedDateTime; import java.time.format.DateTimeFormatter; import java.util.TimeZone; public class DateTimeParserTest { public static void main(String[] args) { String input = "2023-02-16T02:10:00Z"; DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss'Z'").withZone(TimeZone.getTimeZone("Europe/Copenhagen").toZoneId()); ZonedDateTime then = ZonedDateTime.parse(input, formatter ); System.out.println(then); } }

The expression myObject instanceof MyClass is false if myObject is null It’s obvious…