ypxu

### Keybase proof

I hereby claim:

  * I am ypxu on github.
  * I am yingxu (https://keybase.io/yingxu) on keybase.
  * I have a public key ASA5kc7FdnEa48Gn0Tb_gP7sDLO77quXivCdiuSaqHDELgo

To claim this, I am signing this object:

ypxu

import akka.actor.{Actor, ActorRef, ActorSystem, Props}

case object PingMessage
case object PongMessage
case object StartMessage
case object StopMessage

class Ping(pongRef: ActorRef) extends Actor {
  var count = 0

ypxu

class Solution(object):
    def flatten(self, matrix):
        if not matrix:
            return []
        m, n = len(matrix), len(matrix[0])
        delta_move = [(-1, 1), (1, -1)]  # right_up, left_down
        delta_pivot = [(1, 0), (0, 1)]  # down, right

        result = []
        i, j = 0, 0

ypxu

# a - j, Z, M,K,P,Q

"""
Thoughts
Consider the message a tree, walk the message until we meet the valid 
considition which there's no more charactors. 

When we encouter a - j, we substract one from the message. When we see
Z, we look for next valid message, when we counter M,K,P,Q, we look
for two valid message.

ypxu

// use case sample

this.$(this.selectItemsTag).select2({
            placeholder:"Enter an items",
            multiple:true,
            minimumInputLength:1,
            maximumSelectionSize:200,
            initSelection : function (element, callback) {
                var data = [];

ypxu

public class PalindromeNumber {

	public static boolean checkifPalindrome(int num) {
		if (num < 0) {
			return false;
		}
		int div = 1;
		while (num / div >= 10) {
			div = div * 10;
		}

ypxu

import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class MajorityVoting {

	public static String checkForWinner(List<String> votes) {
		String winner = "Nobody";
		String[] votesArr = votes.toArray(new String[votes.size()]);

ypxu

#!/usr/bin/env python

"""
A script to query the Amazon Web Services usage reports programmatically.

Ideally this wouldn't exist, and Amazon would provide an API we can use 
instead, but hey - that's life.

Basically takes your AWS account username and password, logs into the
website as you, and grabs the data out. Always gets the 'All Usage Types'