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 2019년 5월까지, 그리고 2023년부터 지금까지 읽은 책.

특별히 꼽고 싶은 책, 재미있었던 순으로

1. Out of Africa - Karen Blixen
2. 안나 카레니나 - 레프 톨스토이, 펭귄클래식
3. 브로크백 마운틴 - 애니 프루
4. 아들과 연인 - 데이비드 허버트 로런스, 열린책들

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"
)