vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

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This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

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eashish93

vs Questions

---

1. http://stackoverflow.com/questions/804115 (rebase vs merge).
2. https://www.atlassian.com/git/tutorials/merging-vs-rebasing (rebase vs merge)
3. https://www.atlassian.com/git/tutorials/undoing-changes/ (reset vs checkout vs revert)
4. http://stackoverflow.com/questions/2221658 (HEAD^ vs HEAD~) (See git rev-parse)
5. http://stackoverflow.com/questions/292357 (pull vs fetch)
6. http://stackoverflow.com/questions/39651 (stash vs branch)
7. http://stackoverflow.com/questions/8358035 (reset vs checkout vs revert)

paulirish

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

• elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

xameeramir

# Author: Zameer Ansari
# You should look at the following URL's in order to grasp a solid understanding
# of Nginx configuration files in order to fully unleash the power of Nginx.
# http://wiki.nginx.org/Pitfalls
# http://wiki.nginx.org/QuickStart
# http://wiki.nginx.org/Configuration
#
# Generally, you will want to move this file somewhere, and start with a clean
# file but keep this around for reference. Or just disable in sites-enabled.
#

zarv1k

import { ValidationArguments, ValidatorConstraintInterface } from 'class-validator';
import { Connection, EntitySchema, FindConditions, ObjectType } from 'typeorm';

interface UniqueValidationArguments<E> extends ValidationArguments {
  constraints: [
    ObjectType<E> | EntitySchema<E> | string,
    ((validationArguments: ValidationArguments) => FindConditions<E>) | keyof E,
  ];
}

Bradley-D

// Get The Page ID You Need
get_option( 'woocommerce_shop_page_id' ); 
get_option( 'woocommerce_cart_page_id' ); 
get_option( 'woocommerce_checkout_page_id' );
get_option( 'woocommerce_pay_page_id' ); 
get_option( 'woocommerce_thanks_page_id' ); 
get_option( 'woocommerce_myaccount_page_id' ); 
get_option( 'woocommerce_edit_address_page_id' ); 
get_option( 'woocommerce_view_order_page_id' ); 
get_option( 'woocommerce_terms_page_id' ); 

wesbos

function is_blog () {
	global  $post;
	$posttype = get_post_type($post );
	return ( ((is_archive()) || (is_author()) || (is_category()) || (is_home()) || (is_single()) || (is_tag())) && ( $posttype == 'post')  ) ? true : false ;
}


Usage: 

 <?php if (is_blog()) { echo 'You are on a blog page'; } ?>

jhamrick

#!/usr/bin/env bash
#
# Generate a set of TLS credentials that can be used to run development mode.
#
# Based on script by Ash Wilson (@smashwilson)
# https://github.com/cloudpipe/cloudpipe/pull/45/files#diff-15
#
# usage: sh ./genkeys.sh NAME HOSTNAME IP

set -o errexit

danny-englander

/*
* Inspired by: 
* http://designedbythomas.co.uk/blog/how-detect-width-web-browser-using-jquery
* 
* This script is ideal for getting specific class depending on device width 
* for enhanced theming. Media queries are fine in most cases but sometimes
* you want to target a specific JQuery call based on width. This will work 
* for that. Be sure to put it first in your script file. Note that you could
* also target the body class instead of 'html' as well. 
* Modify as needed