CesarChaMal

import java.nio.charset.StandardCharsets
import java.nio.charset.Charset

def string = 'おっぱい - うほ'

def bytes = string.getBytes(StandardCharsets.UTF_8)

def toString = {byte[] bs, Charset cs -> new String(bs, cs) }

def toBytes = {String s, Charset cs -> s.getBytes(cs) }

CesarChaMal

package module1.exercise.discount;

import java.util.List;

public class Basket {

	private double amount;
	private List<Item> items;

	public Basket(List<Item> itemss) {

CesarChaMal

package module2.exercise.mocks;

import java.util.Calendar;

public class Invoice {

	private Calendar date;
	private String customer;
	private double amount;
	public Invoice(Calendar date, String customer, double amount) {

CesarChaMal

-- JitBit SQL Interview Questions (Posted on Hacker News)
-- http://www.jitbit.com/news/181-jitbits-sql-interview-questions/?utm_source=hackernewsletter&utm_medium=email

-- Schema:
-- employees table
  -- EmployeeID
  -- DepartmentID
  -- BossID
  -- Name
  -- Salary

CesarChaMal

Jitbit's SQL interview questions

http://www.jitbit.com/news/181-jitbits-sql-interview-questions/

Schema

employees

• employee_id
• department_id
• boss_id
• name

CesarChaMal

While using git-bash, you may need the zip command to zip files. Then you will get error like “command not found“. This is because git-bash is really just a cut down version of mingw. Fortunately you can manually install the command yourself, not only zip, but any command you can get from gnuwin32.

Here are the steps you can follow.

1. Go to the following link https://sourceforge.net/projects/gnuwin32/files/

2. Find out whatever command you are missing Here I need zip and bzip2 for zip command. Because zip command relies on bzip2.dll to run. Otherwise you will get error “error while loading shared libraries: ?: cannot open shared object file: No such file or directory”.

CesarChaMal

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">

    <modelVersion>4.0.0</modelVersion>

    <groupId></groupId>
    <artifactId></artifactId>
    <version>1.0.0-SNAPSHOT</version>

CesarChaMal

CSS

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What is CSS?

• CSS stands for Cascading Style Sheet.
• Styles define how to display HTML elements
• Styles were added to HTML 4.0 to solve a problem
• External Style Sheets can save a lot of work
• External Style Sheets are stored in CSS files

CesarChaMal

Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.

---

General rules

1. Follow standard conventions.
2. Keep it simple stupid. Simpler is always better. Reduce complexity as much as possible.
3. Boy scout rule. Leave the campground cleaner than you found it.
4. Always find root cause. Always look for the root cause of a problem.

Design rules

CesarChaMal

/* How to calculate postgreSQL database size in disk ? */

SELECT pg_size_pretty(pg_database_size('thedbname'));

/* Calculate size of a table including or excluding the index */

SELECT pg_size_pretty(pg_total_relation_size('big_table'));
SELECT pg_size_pretty(pg_relation_size('big_table')); /* without index */

/* See indexes on a table with `\d tablename` */