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

#[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);

9beach

읽은 책

2015년 2월부터 읽은 책. 2019년 여름부터 2022년까지 병으로 읽지 못하고 2023년부터 다시 읽기 시작함.

특별히 꼽고 싶은 책, 재미있었던 순으로

1. Out of Africa - Karen Blixen
2. 비밀의 계절 - 도나 타트
3. 안나 카레니나 - 레프 톨스토이, 펭귄클래식
4. 브로크백 마운틴 - 애니 프루

fernandoaleman

For MacOS Catalina, visit Install mysql2 on MacOS Catalina

Problem

Installing mysql2 gem errors on MacOS Mojave.

Solution

Make sure openssl is installed on Mac via Homebrew.

siklodi-mariusz

FROM ruby:2.4-alpine3.7

# Install dependencies:
# - build-base: To ensure certain gems can be compiled
# - nodejs: Compile assets
# - postgresql-dev postgresql-client: Communicate with postgres through the postgres gem
# - libxslt-dev libxml2-dev: Nokogiri native dependencies
# - imagemagick: for image processing
RUN apk --update add build-base nodejs tzdata postgresql-dev postgresql-client libxslt-dev libxml2-dev imagemagick

enricofoltran

package main

import (
	"context"
	"flag"
	"fmt"
	"log"
	"net/http"
	"os"
	"os/signal"

m1el

use std::cmp::{Eq};
use std::collections::HashMap;
use std::hash::{Hash};

struct Cacher<I, O, F>
    where
    F: Fn(I) -> O,
{
    function: F,
    cache: HashMap<I, O>,

jahe

/*
JPA (Java Persistence API)

Transaction Management with an Entity-Mananger:
---
entityManager.getTransaction().begin();
entityManager.persist(<some-entity>);
entityManager.getTransaction().commit();
entityManager.clear();

mwlang

class ApplicationController < ActionController::Base
  protect_from_forgery with: :exception

  around_action :global_request_logging

  def global_request_logging
    http_request_header_keys = request.headers.env.keys.select{|header_name| header_name.match("^HTTP.*|^X-User.*")}
    http_request_headers = request.headers.env.select{|header_name, header_value| http_request_header_keys.index(header_name)}
    puts '*' * 40
    pp request.method

peterhellberg

package main

import (
	"context"
	"log"
	"net/http"
	"os"
	"os/signal"
	"time"
)