philipjkim

#[test]
fn iter_demo() {
    let v1 = vec![1, 2, 3];
    let mut v1_iter = v1.iter();

    // iter() returns an iterator of slices.
    assert_eq!(v1_iter.next(), Some(&1));
    assert_eq!(v1_iter.next(), Some(&2));
    assert_eq!(v1_iter.next(), Some(&3));
    assert_eq!(v1_iter.next(), None);

philipjkim

package com.github.philipjkim.demo.hexagonal

import ch.qos.logback.classic.Level
import ch.qos.logback.classic.Logger
import com.tngtech.archunit.core.importer.ClassFileImporter
import com.tngtech.archunit.lang.syntax.ArchRuleDefinition.noClasses
import org.junit.jupiter.api.Assertions.*
import org.junit.jupiter.api.BeforeAll
import org.junit.jupiter.api.DisplayName
import org.junit.jupiter.api.Nested

philipjkim

import static org.junit.jupiter.api.Assertions.*;

class FunctionalVsIemerativeTransformationTest {

    @Test
    void functionalVersusImperative() {
        // Imperative
        var parameterNames = new String[]{"aaa", "bbb"};
        var args = new Object[]{"arg1", "arg2"};
        Map<String, Object> params1 = new HashMap<>();

philipjkim

package com.foo;

import java.util.Stack;

/*
Find sum of n elements after kth smallest element in BST.
Tree is very large, you are not allowed to traverse the tree.
 */

public class BST {

philipjkim

package main

import (
	"fmt"
	"time"

	"encoding/json"

	elastic "gopkg.in/olivere/elastic.v3"
)

philipjkim

Kotlin

• apply / with / let / also /run 언제 사용하는가
• takeIf / takeUnless 언제 사용하는가
• Sealed Class
• Sequence vs. Collection
• Collection Transformations
• Kotlin Idioms
• 코틀린(Kotlin) data class를 JPA에서 사용시 주의할 점

philipjkim

System Architecture

• Cloud Design Patterns presented by Azure
• The Clean Architecture by Uncle Bob
• Clean Architecture 우리말 article
• Clean Architecture using Golang

Server-side Techs

Microservices

philipjkim

package main

import (
	"context"
	"fmt"
	"time"
)

// DemoTimeout .
func DemoTimeout(ctxTimeout time.Duration, workDuration time.Duration) error {

philipjkim

#!/bin/bash

# (for example, your previous author name contains `Anonymous`)
# @ PROJECT_ROOT dir: run
#
# git log | grep -B 1 "Anonymous" | grep commit | awk '{print $2}' | xargs -L 1 ./git-amend-author.sh

if [ "$#" -ne 1 ]; then
    echo "Illegal number of parameters: $#"
    exit 1

philipjkim

{
    "editor.fontSize": 14,
    "[go]": {},
    "[python]": {
        "editor.formatOnSave": true
    },
    "eslint.autoFixOnSave": true,
    "eslint.validate": [
        "javascript",
        "javascriptreact",