Hendi Santika hendisantika

String Comparison

In this gist, i will try to explain you what is the main differences between known string comparison techniques and where to use them.

Explanation of methods

==

This is the main equality operator in Java. To summarize it, this method compares the left and right hands references to eachother and returns boolean. This means this operator returns true only if left and right variable both point at the same Object in the memory. As in most of the class comparisons, this operators is discouraged to use if you're not really intented to check if two variables point to same object.

VirtualBox

https://www.docker.com/toolbox
docker-machine create --driver virtualbox dev
docker-machine env dev (add values to ~/.zshrc)
- e.g. echo eval "$(docker-machine env dev)" >> ~/.zshrc
docker-machine ls
docker ps (might need to re-source .zshrc file; e.g. . ~/.zshrc)
docker run hello-world
docker-machine ip dev

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

-E: will describe the underlaying queries of the \ commands (cool for learning!)
-l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

Install MySQL on macOS Sierra

This procedure explains how to install MySQL using Homebrew on macOS Sierra 10.12

Install Homebrew

Installing Homebrew is effortless, open Terminal and enter :
$ /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
Note: Homebrew will download and install Command Line Tools for Xcode 8.0 as part of the installation process.

Install MySQL

At this time of writing, Homebrew has MySQL version 5.7.15 as default formulae in its main repository :

	class Solution{
	public static void main(String []argh){
	Scanner in = new Scanner(System.in);
	int t=in.nextInt();
	for(int i=0;i<t;i++){
	int a = in.nextInt();
	int b = in.nextInt();
	int n = in.nextInt();
	int sum=0;
	for(int j=1;j<=n;j++)

	def hill_and_vally(s):
	d=[x1-x0 for x0,x1 in zip(s,s[1:]) if x1!=x0]
	return 2+sum(d0*d1<0 for d0,d1 in zip(d,d[1:]))
	#>>> hill_and_vally([1,0,0,0,1])
	#3
	#>>> hill_and_vally([0,1,0,1,0])
	#5
	#>>> hill_and_vally([0,2,2,1,1,0,0])
	#3

	public class Solution {
	public int countHillNValley(int[] nums) {
	if(nums == null \|\| nums.length == 0)
	return 0;
	if(nums.length == 1)
	return 1;
	int count = 1;
	int i = 0, j = i + 1;
	while(i < nums.length && j < nums.length){
	if(nums[j] == nums[i]){

	package com.hendisantika.test.tes3;

	import java.util.HashMap;
	import java.util.Map;

	/**
	* Created by IntelliJ IDEA.
	* Project : test-java
	* User: hendisantika
	* Email: [email protected]

	<!DOCTYPE html>
	<html>
	<head>
	<title>Tes Form</title>
	</head>
	<body>
	<input id='first' type="text" class="form-control formBlock" name="bus_ticket" placeholder="Bus Ticket..." required/><br />

	<input id='second' type="text" class="form-control formBlock" name="plane_ticket" placeholder="Plane Ticket..." required/><br />

	<?xml version="1.0" encoding="UTF-8"?>
	<bank xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="bank.xsd">
	<accounts>
	<savings_accounts>
	<savings_account id="a1" interest="0.03">
	<balance>2500</balance>
	</savings_account>
	<savings_account id="a2" interest="0.03">
	<balance>15075</balance>
	</savings_account>