import static java.lang.Math.*; abs System.out.println(abs(-34.5)); // 34.5 ceil System.out.println(ceil(2.17)); // 3.0 floor System.out.println( ...

Know your primitive types AND(&) if both bits are 1, it gives 1, else it gives 0. System.out.println(Integer.toBinaryString(6)); // 110 System.out.println(Integer.toBinar ...

Java basic type data structures

Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

플러터 공부를 위해 Dart를 배우는데, 소문보다(?) 괜찮은 언어인것 같다. 자바와 자바스크립트 장점을 적절히 가져온듯 Null safety ?: null 가능 !: null 불가 void main() { int? couldBeNullButIsnt = 1; // null possible int a = couldB ...