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러시아 페인트공 알고리즘

페인트공이 첫날은 차선 페인트 작업을 300야드 칠함 둘째 날은 150야드 칠함 셋째 날은 30야드 칠함 첫 날은 어떻게 10배를 칠했는지 관리자가 묻자 저도 어쩔 수 없었습니다. 매일 페인트 통에서 점점 멀어지니까요

• "조엘 온 소프트웨어" by 조엘스폴스키(스택오버플로, 트렐로 창업자)

appkr

CREATE TABLE tablea (str varchar(8), PRIMARY KEY (str));
CREATE TABLE tableb (str varchar(8), PRIMARY KEY (str));
INSERT INTO tablea (str) VALUES ('A'), ('B'), ('C'), ('D');
INSERT INTO tableb (str) VALUES ('C'), ('D'), ('E'), ('F');

-- 합집합

appkr

101

• http://postgis.net/workshops/postgis-intro/geometries.html

Create table

CREATE DATABASE db_name ENCODING=utf8 lc_collate="C" template=template0;

-- Reconnect to `db_name` database
-- @see https://stackoverflow.com/questions/3949876/how-to-switch-databases-in-psql
CREATE EXTENSION postgis;

appkr

package ...;

import org.springframework.stereotype.Component;

import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.HashSet;

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@Configuration
@EnableJpaRepositories("package.to.repository")
@EnableJpaAuditing(auditorAwareRef = "springSecurityAuditorAware")
@EnableTransactionManagement
public class DatabaseConfiguration {

    private final Logger log = LoggerFactory.getLogger(DatabaseConfiguration.class);

    @Bean
    @ConfigurationProperties(prefix = "spring.datasource.hikari.master")

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public class Elem { 
    public String key; 
    public String value; 
    public Elem (String key, String value) {
        this.key = key;
        this.value = value;
    }
    public boolean equals(Object o) {
        Elem other = (Elem) o;
        return key.equals(other.key)

appkr

package kata;

import org.junit.Test;
import java.util.*;
import static org.junit.Assert.*;

public class MutabilityTest {

    @Test
    public void isJavaMapImmutable() {

appkr

// @see https://github.com/madvirus/ddd-start

public enum OrderState {
  PAYMENT_WAITING {
    public boolean isShippingChangeable() {
      return true;
    }
  }, PREPARING {
    public boolean isShippingChangeable() {
      return true;

appkr

Problem

[2018-06-25 19:54:37] local.DEBUG: GuzzleHttp\Exception\RequestException: cURL error 77: error setting certificate verify locations:
  CAfile: /tmp/cacert.pem
  CApath: none (see http://curl.haxx.se/libcurl/c/libcurl-errors.html) in /Users/appkr/meshkorea/korean-address-database-laravel/vendor/guzzlehttp/guzzle/src/Handler/CurlFactory.php:187

Docker

appkr

증상

$ php -v
# dyld: Library not loaded: /usr/local/opt/icu4c/lib/libicui18n.62.dylib
#   Referenced from: /usr/local/bin/php
#   Reason: image not found
# [1]    10512 abort      php -v

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