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# ~/.bashrc: executed by bash(1) for non-login shells.
# see /usr/share/doc/bash/examples/startup-files (in the package bash-doc)
# for examples

# If not running interactively, don't do anything
case $- in
    *i*) ;;
      *) return;;
esac

SiestaMadokaist

sudo tee /etc/yum.repos.d/mongodb-org-5.0.repo << EOF
[mongodb-org-5.0]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/8/mongodb-org/5.0/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-5.0.asc
EOF

sudo tee /etc/yum.repos.d/pritunl.repo << EOF

SiestaMadokaist

interface IGuess {
  word: string;
  score: string;
};
const A = 'a'.charCodeAt(0);
export class Wordle {

  /**
   * 0 = possible
   * 1 = impossible

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class MySet<T> extends Set<T> {
  static of<T>(...xs: T[]): MySet<T> {
    return new this<T>(xs);
  }

  intersect(other: MySet<T>): MySet<T> {
    const result = new MySet<T>();
    for (const entry of this.values()) {
      if (other.has(entry)) { result.add(entry); }
    }

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import Axios, { AxiosInstance } from 'axios';

abstract class BaseRequest {
  abstract request(): AxiosInstance;
}

class Host1 extends BaseRequest {
  request(): AxiosInstance { throw new Error('not implemented'); }
  // todo
  buyProduct() {

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import { Readable, Transform, Writable } from 'stream';
export type Callback = (error: Error | null | undefined) => void;
export type TCallback = (error?: Error | undefined ) => void;

export abstract class GReadable<T1> extends Readable {
  constructor(props: any = {}){
    super({ ...props, objectMode: true });
  };

  _read(){}

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Table UserTransactions

account_id {String}	nonce {Integer}	updates {Integer}	balance {Integer}	previous {Integer}	Description {String}
0000001	0	0	0	0	Initialization
0000001	1	10	10	0	Deposit from ....

Constraint:

• UNIQUE(AccountId, Nonce) prevent double spending

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const FundData = require('./FundData');
class FundBalancer {
  constructor(){
    this.state = { data: [] }
  };

  insert({ owner, current, expected }){
    const fd = new FundData({ owner, current, expected });
    this.data().push(fd);
  }

SiestaMadokaist

#  x - 2.y + z = 9
#  2.x - y = 4
#  y + z = 12

[x]   [1, -2, 1]   [9]
[y] * [2, -1, 0] = [4]
[z]   [0,  1, 1]   [12]

# if we want to find out the x, y, and z, we can just

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class LinearEquation

  attr_reader(:eq)
  extend Memoist
  def initialize(&eq)
    raise ArgumentError, "equation must be passed" unless block_given?
    @eq = eq
  end

  def raw_equations