Han Ngo tieubao

Chương 1: Quản Lý Tiền Bạc Để Thành Công Trong Giao Dịch Ngày (Managing Money to Succeed as a Day Trader)

Kiểm soát rủi ro là nền tảng: Kết quả giao dịch không kiểm soát được, nhưng mức lỗ thì có; sống sót qua kỷ luật để học hỏi.
Vị thế quá lớn gây hại: Gây mất lớn, cảm xúc mạnh (tham lam/sợ hãi); cắt lợi nhuận sớm, giữ lỗ lâu; rủi ro 50-100% vốn một lệnh = cờ bạc, không phải giao dịch.
Chỉ giao dịch tiền có thể mất: Không phụ thuộc vào thắng để sống; mất hết = không sao; giảm gắn bó cảm xúc, tăng khách quan.
Nhỏ hơn = lớn hơn: Vị thế nhỏ giúp cắt lỗ nhanh, phục hồi dễ; vị thế lớn cần lợi nhuận cao hơn để bù phí, thời gian.
Điều chỉnh vị thế cân bằng: Dựa giá cổ phiếu (ví dụ: 1 điểm ở $10 = 10%, ở $100 = 1%); vị thế tỷ lệ nghịch với giá để rủi ro % bằng nhau.
Quy tắc 2%: Mất tối đa 2% vốn/lệnh (bao gồm phí); lỗ 6-8% tháng = dừng, đánh giá; dùng để bảo hiểm, tăng cơ hội chơi lâu dài.
Biên (margin): Tăng đòn bẩy nhưng rủi ro cao (ví dụ: LTCM phá sản 1997 do 20:

Count the number of unique characters in a file

# https://unix.stackexchange.com/questions/5010/how-can-i-count-the-number-of-different-characters-in-a-file # works for linux. There is a variation for MacOS in the link ^ sed 's/\(.\)/\1\n/g' text.txt | sort | uniq -c # sort -nr # uncomment this to sort the list by frequency

Replace a string in all instances of files in a directory

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes $ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

Must have Dockerfile inside project, that able to run docker built -t test:1.0.0 ./
Image must be expose port as 80
Image after build could run directly without any config file, config only accept to inject by environment variables

docker run -e "MYSQL_HOST=127.0.0.1" -e "MYSQL_USERNAME=root" test:1.0.0

Must have Jenkins file follow this pattern

pipeline { agent any

Important: I'm writing this when the last version of macOS (and the one I have installed) is Mojave. There is already a script which installs Mojave in a virtual machine here https://github.com/img2tab/okiomov. But if you are curios how to do everything manually to install High Sierra, then this guide may be useful.

After reading a few articles I ended up with these steps:

On macOS, download the High Sierra installer (even if you have Mojave installed): https://itunes.apple.com/us/app/macos-high-sierra/id1246284741?ls=1&mt=12
If the High Sierra Installer starts, quit it.
Open "Disk Utility".
Click on "File" > "New Image" > "Blank image...". Or just press cmd+N.

Concurrency in Swift: One approach

Author: Chris Lattner

I'd never heard of HackerRank, but after you wrote two other employers sent me their own HackerRank tests. Having worked on those tests first (I considered them practice, for the real thing with ABC :), I'd like to check if you have flexibility in finding an alternative way to evaluate my basic coding chops.

This is because, as functional programmer and author Paul Chiusano says, "Programming is all about managing complexity" [1], but HackerRank is quite bad at measuring my ability to manage complexity. It asks for small algorithmic coding puzzles to be done in unnatural conditions including (1) time limits, (2) forbidding research on Wikipedia or StackOverflow, (3) forbidding collaboration, and (4) forbidding the use of libraries (Python and JavaScript e.g. are so different when confined to thei

	#!/bin/bash

	#shows traffic on the specified device

	function human_readable {
	VALUE=$1
	BIGGIFIERS=( B K M G )
	CURRENT_BIGGIFIER=0
	while [ $VALUE -gt 10000 ] ;do
	VALUE=$(($VALUE/1000))

	##TCP FLAGS##

	Unskilled Attackers Pester Real Security Folks
	==============================================
	TCPDUMP FLAGS
	Unskilled = URG = (Not Displayed in Flag Field, Displayed elsewhere)
	Attackers = ACK = (Not Displayed in Flag Field, Displayed elsewhere)
	Pester = PSH = [P] (Push Data)
	Real = RST = [R] (Reset Connection)
	Security = SYN = [S] (Start Connection)

	const MY_DOMAIN = "agodrich.com"
	const START_PAGE = "https://www.notion.so/gatsby-starter-notion-2c5e3d685aa341088d4cd8daca52fcc2"
	const DISQUS_SHORTNAME = "agodrich"

	addEventListener('fetch', event => {
	event.respondWith(fetchAndApply(event.request))
	})

	const corsHeaders = {
	"Access-Control-Allow-Origin": "*",