datlife

Install dnsmasq

brew install dnsmasq

Configure dnsmasq.conf

I will run my dnsmasq nameserver locally under 127.0.0.1:53 and will resolve a wildcard domain *.ml-dev.test to an local IP. Look for the line listen-address and address

datlife

"""
Mortgage Calculator for fun
https://en.wikipedia.org/wiki/Mortgage_calculator


What I want to know:
---- What's interest  that I have to pay at payment N ?
---- What's principal that I have to pay at payment N ?

datlife

Problem statement

I have a fast producer (client) and slow subscriber (server) due to slow Internet connection. How to decouple the connection such that server won't affect client performance?

• The server will not send any data back to client once the TCP connection is established. In my case, it is a data sink.

Solution

In order to avoid drag down client IO, e.g. waiting for ACK from server, there are a few solutions:

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Format /etc/passwd file

tail -n +11 /etc/passwd| sort -t$':' -k3 -n | awk -F":" \
'
 BEGIN {
    printf "GID | Name        | User_dir          | Bash_Access        | Description      \n"
    printf "--- | ----------- | ----------------- | ------------------ | -----------------\n"
 }
 {
 printf "%s | %s | %s | %s | %s\n",$3, $1, $6, $7, $5 

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bqkrtxgkmriwsiwcngtivpx.info
jdtmfupdyueqeldvhsjzdvzob.net
guhmpoxzivhba.com
nqqxqhuacaqhzurde.org
lgqsqgpqzijwid.info
ykolyecdcyk.biz
ztvflnxqzpxvpfobv.biz
zqrmkpivrbxccawozqwqpfzh.org
iqyqwhntrxfeq.org
ftadkbomxlnsib.info

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Status: alpha

alias k=kubectl

# Add microsoft charts to heml
helm repo add msftcharts http://microsoft.github.io/charts/repo
helm repo update

# Launch spark cluster with custom config

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#!/bin/bash
# Enable fractional scaling on Ubuntu 18.04
#
# Problem:
# --------
#   - Ubuntu 18.04 runs on Gnome 3.28, whichs does not support fractional scaling (120%, 130%).
#   - As a result, the text and icon on my 4K 27" monitor are very small.
#
# Usage:
# -------

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// Async should be first priority over callbacks and promises
//
// High level idea:
//   - Avoid .then .catch in promise
//   - Syntatic sugar to make async programming similar to sequential code
const axios = require('axios');
DEFAULT_URL = "https://jsonplaceholder.typicode.com"

async function getUser(id) {
    let resp = await axios.get(`${DEFAULT_URL}/users/${id}`)

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Build LLVM / Clang on MacOS

Problem

Built-in Clang / LLVM shipped by Xcode does not support Leak Santizer (-fsantize=leak) feature. For example, this code has memory leak:

// File: main.c

#include <stdlib.h>

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Spark Setup MacOS Guide

Reference: https://spark.apache.org/docs/latest/

Overview:

• Install Java 8+, then add to PATH and JAVA_HOME