Learning Log

2017-01-12-13-39-37

Yield in PHP

Yield is a keyword that returns data from a generator function.

https://stackoverflow.com/questions/17483806/what-does-yield-mean-in-php

If normal iteration requires an entire array to be in memory, a generator function only requires the data at hand to be in memory. e.g. UPS vs Ping pong.

January 26, 2016 to present

php.net: iteratoraggregate

php.net: sprintf()

Delete all git tags

#Delete local tags.
git tag -l | xargs git tag -d
#Fetch remote tags.
git fetch
#Delete remote tags.
git tag -l | xargs -n 1 git push --delete origin
#Delete local tags.
git tag -l | xargs git tag -d

from https://gist.github.com/okunishinishi/9424779

phing psr-fix

wiki.theory.org/YourLanguageSucks

urlencode

This function is convenient when encoding a string to be used in a query part of a URL, as a convenient way to pass variables to the next page.

string urlencode ( string $str )

php.net/manual/en/function.urlencode.php

error: missing parent constructor call

Calling a parent's contructor in php

parent::__construct();

/**
 * @param MyClass $myInstance
 */
public function __construct(MyClass $myInstance = null)
{
    parent::__construct();
    if (!$myInstance instanceof MyClass) {
        $myInstance = new UserCollection();
    }

    $this->myInstance = $myInstance;
}

Mock repositories will be needed to make sure the services can be provided to the controllers.

Various ways to discard changes in git:

git checkout . # Removes Unstaged Tracked files ONLY [Type 2]
git clean -f # Removes Unstaged UnTracked files ONLY [Type 3]
git reset --hard # Removes Staged Tracked and UnStaged Tracked files ONLY[Type 1, Type 2]
git stash -u # Removes all changes [Type 1, Type 2, Type 3]

http://stackoverflow.com/questions/22620393/various-ways-to-remove-local-git-changes

Why does JSON require double quotes?

save composer requirement

composer require "touchlab/thunderdome-php=dev-stable"

Selenium

  • Page Object Model & Selenium #bestPractice
  • Ruby inheritence vs extends
  • page object gem
  • text_field() create methods you can call on the class
page = LoginPage.new
# ...same as
visit LoginPage do |page| ...

sleep is bad. Use expect {}.to change {} ... expect().to eq ...

Why runner, rathre than rspec directly?

  • deletes webapp logs
  • runs in parallel

Looking into Auto-Complete Tools

Avoid inheritance hierarchies when possible since they're more limiting than reusable

duplicate a directory, preserving rights, symlinks...

cp -a src target

# -a, --archive, same as -dR --preserve=all

Backbone.js

HTML: maxlength

The maximum number of characters allowed in the <input> element. Default value is 524288.

<input maxlength="number">

example:

<form action="demo_form.asp">
  Username: <input type="text" name="usrname" maxlength="10"><br>
  <input type="submit" value="Submit">
</form>

From: SourceMaking

Builder Pattern: Separates object construction from its

  • BitMask
  • Futures
  • Promises
  • React Router

Intro to...

Webpack, ES6, Babel, React, Redux, & React-Redux

.php and .phtml are synonymous, interpreted exactly the same.

From: StackOverflow

.phtml was the standard file extension for PHP 2 programs. .php3 took over for PHP 3. When PHP 4 came out they switched to a straight .php.

With the GitBook YouTube plugin, embed videos using:

{% youtube %}https://www.youtube.com/watch?v=9bZkp7q19f0{% endyoutube %}

git fetch --tags --prune

to ad the Todo plugin to gitbook

npm install --save gitbook-plugin-todo

Then add this to your book.json

{
    "plugins": ["todo"]
}

speed up git status by not showing untracked files:

git status --untracked-files=no

Which is the same as:

git status -uno

Useful with very large projects.

http://stackoverflow.com/questions/594757/how-do-i-do-a-git-status-so-it-doesnt-display-untracked-files-without-using

green fielding: creating new code

setting a specific port with gitbook serve:

gitbook --port 3000 serve

Created a HSTS entry. Wikipedia article

2016-04-18

Create symlinks for appropriate brew apps

brew linkapps <app_name_or_blank>

Experimenting with Emacs because I'm interested in org-mode.

StackOverflow: What is the difference between Aquamacs and other Mac versions of Emacs?

brew install emacs --HEAD --use-git-head --with-cocoa --with-gnutls --with-rsvg --with-imagemagick

2016-04-13

  • Gitbook, within SUMMARY

  • CAN-SPAM Act of 2003

    • The CAN-SPAM Act of 2003, signed into law by President George W. Bush on December 16, 2003, establishes the United States' first national standards for the sending of commercial e-mail and requires the Federal Trade Commission (FTC) to enforce its provisions.

    • Why emails need an unsubscribe link in emails.
    • Wikipedia Link

2016-04-11

  • chmod 755 <script_name> making a ruby script executable

2016-03-29

  • array_filter()

2016-03-25

  • foreach() in PHP is destructive; clone the enumerable prior to use:

    foreach(clone $myStuff as $thing) {...};

2016-03-22

  • Namespace leaks with a foreach() loop in PHP

    $testVar = ['yo', 'mario'];

foreach($testVar as $t) {}

echo $t;

    mario

  • Kintsugi (金継ぎ?) (Japanese: golden joinery) or Kintsukuroi (金繕い?) (Japanese: golden repair) is the Japanese art of repairing broken pottery with lacquer dusted or mixed with powdered gold, silver, or platinum, a method similar to the maki-e technique. As a philosophy it treats breakage and repair as part of the history of an object, rather than something to disguise. https://en.wikipedia.org/wiki/Kintsugi

    Kintsugi Bowl

  • Kaizen (Continuous Improvement) is a strategy where employees at all levels of a company work together proactively to achieve regular, incremental improvements to the manufacturing process. In a sense, it combines the collective talents within a company to create a powerful engine for improvement. http://www.leanproduction.com/kaizen.html

2016-03-21

Changing the author of the last commit

git commit --amend --author="John Doe <[email protected]>"

http://stackoverflow.com/questions/3042437/change-commit-author-at-one-specific-commit

gatling.io

Load testing framework written in Scala

  • In PHP, using the final keyword with a class or method prevents child classes from overriding it, whether with a new method declaration or a class extesion. (PHP.net)

    <?php
final class BaseClass {
   public function test() {
       echo "BaseClass::test() called\n";
   }

   // Here it doesn't matter if you specify the function as final or not
   final public function moreTesting() {
       echo "BaseClass::moreTesting() called\n";
   }
}

class ChildClass extends BaseClass {
}
// Results in Fatal error: Class ChildClass may not inherit from final class (BaseClass)
?>

  • In PHP, array_key_exists() will tell you if a key exists in an array, isset() will only return true if the key/variable exists and is not null.

2016-03-17

  • Grabbing command line arguments from a PHP script

    $shortopts  = "";
$shortopts .= "f:";  // Required value
$shortopts .= "v::"; // Optional value
$shortopts .= "abc"; // These options do not accept values

$longopts  = array(
    "required:",     // Required value
    "optional::",    // Optional value
    "option",        // No value
    "opt",           // No value
);
$options = getopt($shortopts, $longopts);

    php example.php -f "value for f" -v -a --required value --optional="optional value" --option

    array(6) {
  ["f"]=>
  string(11) "value for f"
  ["v"]=>
  bool(false)
  ["a"]=>
  bool(false)
  ["required"]=>
  string(5) "value"
  ["optional"]=>
  string(14) "optional value"
  ["option"]=>
  bool(false)
}

2016-03-16

2016-03-15

  • Change mode to be executable: chmod +x <file>; nothing new here, but I thinking of it as chmod, not change mode. I think the latter will be easier to remember.

  • paste this into your browser console to beautify formatting

    var sheet = document.createElement('style');
sheet.innerHTML = "body{margin: 40px auto;max-width: 650px;line-height: 1.5;font-size: 18px;color: #3a3a3a;padding: 0 10px;}";
document.body.appendChild(sheet);

2016-03-14

  • UML diagram w/i PhpStorm:

    1. install plugin (it's the only UML one)
    2. select dir
    3. ⇧ + ⌥ + ⌘ + u

  • git: show files updated/created in the past x days

    git log --pretty=format: --name-only --since="3 days ago" | sort | uniq

  • What I've worked on recently:

2016-03-07

2016-02-26

  • Set configs for an atom project across IDEs: https://atom.io/packages/editorconfig

  • Looking into linting my markdown

    • Remark Lint, built on Remark. Rules can be found here

      npm install --global remark remark-lint

    • configure with .remarkrc

      {
  "plugins": {
    "lint": {
      "no-multiple-toplevel-headings": true,
      "list-item-indent": true,
      "maximum-line-length": false,
      "ordered-list-marker-value": false,
      "no-duplicate-headings": false
    }
  },
  "settings": {
    "commonmark": true
  }
}

2016-02-24

2016-02-23

  • I have a love/hate relationship with Xdebug and PhpStorm. When it works, I love debugging.

2016-02-18

2016-02-17

  • remove a remote repo in git

    git remote rm <remote_name>

  • calling a parent method in ruby:

    From: StackOverflow

    If the method is the same name, i.e. you're overriding a method you can simply use super. Otherwise you can use an alias_method or a binding.

    class Parent
    def method
    end
end

class Child < Parent
    alias_method :parent_method, :method
    def method
        super
    end

    def other_method
        parent_method
        #OR
        Parent.instance_method(:method).bind(self).call
    end
end

  • copy the contents of id_rsa.pub to your clipboard

    pbcopy < ~/.ssh/id_rsa.pub

2016-02-16

  • renaming a remote branch in git

    git remote rename origin destination

  • push to all remotes in git

    git remote | xargs -L1 git push --all

2016-02-15

2016-02-12

  • change author of last git commit

    git commit --amend --author="Chris Torsten <[email protected]>"

  • attr_reader(*ATTR_READERS) gets rid of never-ending arguments after attr_reader

  • {@inheritdoc} within a PHPDoc inherits the long description from the parent class.

2016-02-10

  • to get the size of a path: $ du

    • du -hs gives just the dir it's run in
    • man page

  • git shallow commit

    • git clone --<depth>:: creates a shallow clone with a truncated history to a specifed depth.
    • Although not recommended, you can push and pull from it

2016-02-09

  • With an optional property (which is a class itself) within a PHP class, It's a good idea to create a Null version of the class that is returned by default if the argument is null.

    NullMyPropClass->getValue() # returns an empty string.

    You could also return null, but there is value in always returning the same type.

2016-02-05

  • typing f using vimium is a great way to navigate a web page.
  • typing f while on a gitbook page brings up search.

2016-02-04

  • Kitematic, a nice tool to interact with your docker images.
  • Playing around with Huginn, an interesting agent tool, like IFTTT (here's a nice video). ...pretty sure it's logo and name alude to one of my favorite authors, Daniel Suarez.

2016-02-03

  • http://readable.tastefulwords.com/ Great tool to make a site readable.

  • Phing (PHing Is Not GNU make)

    it's a PHP project build system or build tool based on ​Apache Ant. You can do anything with it that you could do with a traditional build system like GNU make, and its use of simple XML build files and extensible PHP "task" classes make it an easy-to-use and highly flexible build framework.

  • To zero out a css transform, which you may want to do if it leaves junk pixels...

    .modal-shadow .modal {
    -webkit-transform: none;
    transform: none;
}

2016-02-02

2016-02-01

Week of 2016-02-01

Switching to a Twitter-esque sorting

Learning Log

Week of 2016-01-25

2016-01-26

  • Playing around with GitBook. Not yet settled on how I want to store/publish my notes.

    partly inspired by John's notes: github.com/qsymmachus/notes, I think the most valuable element of that inspiration may very well be the learning log concept.

  • Laravel/Lumen Container: manages class dependencies and aids with dependency injection, by "binding" dependency interfaces to dependency implementations. These bindings are registered in Service Providers. An instance of Container is available in all Service Providers as app:

    return new MailgunMailer($app[Credentials::class]) })

    Any time an object has Mailer injected as a dependency, the Container will inject this particular instance. As illustrated above, you can resolve bindings from the Container with the following syntax:

    $this->app[SomeClass::class]
$this->app->make(SomeClass::class) // alternate syntax
$this->app->bind(Mailer::class, function ($app) {}

  • playing around with using gitbooks.io to publish this repo, you can find it here: https://torsday.gitbooks.io/notebook/content/learning_log.html

2016-01-27

  • To commit case-sensitive only filename changes in Git:

    git config core.ignorecase false

    see StackOverflow: 17683458

2016-01-28

  • When you use EventCollection with an iteration operator such as foreach, it pops each element off, destroying the data structure. You may need to use clone:

    foreach (clone $this->accountStatusEvents as $e) {
    $serializedEvents[] = EventJsonSerializerFactory::create($e);
}

  • $this->assertCount($expectedInt, $countableObj);

    $eventCollection = new EventCollection();
$count           = count($eventCollection); // 0

    How it works: EventCollection extends Collection which extends SplMaxHeap (http://php.net/manual/en/class.splmaxheap.php) which implements Countable (http://php.net/manual/en/class.countable.php).

  • Private functions should be positioned below public ones in PHP.

  • upgrade npm packages

    Identify out of date packages (npm outdated). Update the versions in your package.json. Run npm update to install the latest versions of each package.

  • font awesome has a nice history icon

  • to make an image appear in markdown, make a link with an exclamation point prepended to it.

    ![Local Image](./images/<image_file_name>)

  • CSS to use system fonts on mobile devices:

    font-family: system, -apple-system, ".SFNSText-Regular", "San Francisco", "Roboto", "Segoe UI", "Helvetica Neue", "Lucida Grande", sans-serif;

  • Sleep display

    pmset displaysleepnow

  • empty directories

    # list
find . -type d -empty -print

# delete
find . -type d -empty -delete

  • git branch authors

    git for-each-ref --format='%(committerdate)%09%(authorname)%09%(refname)' | sort -k5n -k2M -k3n -k4n | grep remotes | awk -F "\t" '{ printf "%-32s %-27s %s\n", $1, $2, $3 }'

  • git merged remote branches

    for branch in `git branch -r --merged | grep -v HEAD`; do echo -e `git show --format="%ci %cr %an" $branch | head -n 1` \\t$branch; done | sort -r

  • git un-merged remote branches

    for branch in `git branch -r --no-merged | grep -v HEAD`; do echo -e `git show --format="%ci %cr %an" $branch | head -n 1` \\t$branch; done | sort -r

  • rename extensions of files in a dir

    find . -name "*.rb" -exec bash -c 'mv "$1" "$(sed "s/\.rb$/.md/" <<< "$1")"' - '{}' \;

2016-01-29

  • Shift+Esc to clear all slack channel notifications

TODO: outline likely CK files to create

  • kamino/modal

    // JSX
return (
    <Modal
        nox
        ref="something"
    >
        content
    </Modal>
);

// Javascript ES6
this.refs.something.show(); -> show modal
this.refs.something.hide(); -> hide modal

  • git stage part of file

    git add -p

  • TODO bind in Javascript

  • Reminded about how useful inserting debugger into my JS code can be when combined with Chrome.

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