tiffany-taylor

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Hello World, how is it going?

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Keybase proof

I hereby claim:

• I am tiffany-taylor on github.
• I am tylae (https://keybase.io/tylae) on keybase.
• I have a public key ASDB78TWkJwsPcBulk-zm5Lgbdwb2BsZTnVFo6NgkHcS4Qo

To claim this, I am signing this object:

tiffany-taylor

Setting up Bridged Mode in Ubuntu Server in Virtualbox

(Note: these are primarily notes for myself, so a lot of assumptions are made based on things I already know. I may add additional relevant information in the future, I may not.)

Things that will need setting up prior to setting up bridged mode

• Set up the server like normal, sudo apt update and what not.
• Install vim as well.
• Settings for VM will need Network set up to Bridged Adapter to be able to SSH into the machine after configuration is complete.

And then setting up bridged mode in the VM...

1. test pinging google.com, it should "just work"

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Personal Development Todo

• finish Head First Design Patterns
• node.js
• Docker
• bitwise operation

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Covariance and Contravariance

In PHP 7.2.0, partial contravariance was introduced by removing type resetrictions on parameters in a child method. As of PHP 7.4.0, full covariance and contravariance support was added.

Covariance allows a child's method to return a more specific type than the return type of its parent's method. Whereas, contravariance allows a parameter type to be less specific ina child method, than that of its parent.

Covariance

To illustrate how covariance works, a simple abstract parent class, Animal is created. Animal will be extended by children classes, Cat, and Dog.

(example)

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Pages I want to fix in PHP docs

• https://www.php.net/manual/en/ref.pdo-mysql.connection.php

  • Examples need reordering or new header

• https://bugs.php.net/bug.php?id=78677

  • need to add info about parameter type widening on variance page
  • https://www.php.net/manual/en/language.oop5.variance.php

• document internal PHP web server flags

• https://www.php.net/manual/en/features.commandline.webserver.php

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- read about mappers, entities and services when approaching model
- https://stackoverflow.com/questions/5863870/how-should-a-model-be-structured-in-mvc/5864000#5864000
- https://stackoverflow.com/questions/16356420/mvc-for-advanced-php-developers/16356866#16356866
- practice creating routers
- read about big endian and little endian
      https://www.cs.umd.edu/class/sum2003/cmsc311/Notes/Data/endian.html
- read about 8 byte strings and 64-bit integer, signed and unsigned, blah blah blah
      http://users.ece.utexas.edu/~valvano/embed/chap3/chap3.htm
- (challenge) OK here's a fun task for you lovely people... I have a 32-bit PHP installation. I also have an 8 byte string representing 
   a little-endian signed 64-bit integer. This integer is a unix timestamp with nanosecond granularity (and no, I did not choose this). 

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An ongoing list of notes that I've found useful over time, gathered in one spot.

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Setting up a Virtual Machine using Virtualbox and Ubuntu

Originally written to work with Patrick Louys' No Framework Tutorial for PHP.

I use Git Bash, which is installed with Git, as my SSH client, you can use whatever you prefer. Git Bash is a variant of MinGW.

Note: "head mode" means that the VM has a GUI, "headless mode" means that the VM is running, but there is no GUI, and requires a secure connection into the server, in this case by SSH.

Download/Install Virtualbox