holmberd

Dynamically create nested level groups by properties in Javascript

Code

/**
 * Creates nested groups by object properties.
 * `properties` array nest from highest(index = 0) to lowest level.
 *
 * @param {String[]} properties
 * @returns {Object}

dherges

class LruCache<T> {

  private values: Map<string, T> = new Map<string, T>();
  private maxEntries: number = 20;

  public get(key: string): T {
    const hasKey = this.values.has(key);
    let entry: T;
    if (hasKey) {
      // peek the entry, re-insert for LRU strategy

Ynote

// This is just a short reminder of this great explanation:
// http://www.2ality.com/2015/06/tail-call-optimization.html

// not TCO
function factorial(n) {
  if (n <= 0) return 1;
  
  return n * factorial(n-1); // here, the main recursive call not in a tail position because of the `n` context.
}

oanhnn

Problem

I have two Github accounts: oanhnn (personal) and superman (for work). I want to use both accounts on same computer (without typing password everytime, when doing git push or pull).

Solution

Use ssh keys and define host aliases in ssh config file (each alias for an account).

How to?

1. Generate ssh key pairs for accounts and add them to GitHub accounts.

DinkDonk

This will set up a passthrough between the eth0 interface and the wan0 interface, with a VPN connection in-between.
You can then connect a machine to the ethernet port of the raspberrypi, and that machines network traffic will pass through the vpn tunnel on the raspberrypi.

The device connected to the ethernet plug of the PI should be set up with:

IP: 192.168.0.2
Mask: 255.255.255.0
Gateway: 192.168.0.1

Set up interfaces