Amjed Omar amjedomar

This notes is written by Sheldon. You can find me with #iOSBySheldon in Github, Youtube, Facebook, etc.

Need

Convert .mov/.MP4 to .gif

Reason

As a developer, I feel better to upload a short video when I create the pull request to show other viewers what I did in this PR. I tried .mov format directly got after finishing recording screen using Quicktime, however, gif offers preview in most web pages, and has smaller file size.

This is not limited to developer, anyone has this need can use this method to convert the files.

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

	<?php // Do not copy opening php tag

	/**
	* Remove WooCommerce site visibility "Live" badge from the admin bar.
	*
	* @param WP_Admin_Bar $wp_admin_bar The WP_Admin_Bar instance, passed by reference.
	*/
	add_action( 'admin_bar_menu', 'khp_remove_woocommerce_site_visibility_badge', 999 );
	function khp_remove_woocommerce_site_visibility_badge( $wp_admin_bar ) {
	$wp_admin_bar->remove_node( 'woocommerce-site-visibility-badge' );

	// knockout 2.2.1

	ko.utils.arrayFilter = function (array, predicate) { /* .. */ }

	ko.utils.arrayFirst = function (array, predicate, predicateOwner) { /* .. */ }

	ko.utils.arrayForEach = function (array, action) { /* .. */ }

	ko.utils.arrayGetDistinctValues = function (array) { /* .. */ }

	<?xml version="1.0"?>
	<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" layout="checkout" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
	<body>
	<referenceContainer name="content">
	<referenceBlock name="checkout.root">
	<arguments>
	<argument name="jsLayout" xsi:type="array">
	<item name="components" xsi:type="array">
	<item name="checkout" xsi:type="array">
	<item name="children" xsi:type="array">

	# Backup
	docker exec CONTAINER /usr/bin/mysqldump -u root --password=root DATABASE > backup.sql

	# Restore
	cat backup.sql \| docker exec -i CONTAINER /usr/bin/mysql -u root --password=root DATABASE

	// source: https://www.khanacademy.org/computing/computer-science/algorithms/sorting-algorithms/a/analysis-of-selection-sort

	const range = (start, end) => [...new Array(end - start + 1)].map((_, idx) => start + idx);
	const sum = (arr) => arr.reduce((acc, cur) => acc + cur, 0);

	const decreasingSum = (num) => {
	if (num < 1) throw new Error('value should be >= 1')
	return num/2 * (num + 1)
	}

	Interlaced image loads an early degraded version of the whole image as soon as possible and then progressively renders the image to clear state.

	Non-interlaced image will load up in tiles showing clear image in each tile as it progresses to load in the image.

	For .jpg the interlaced = progressive and not interlaced = baseline.

	class Cat {
	static count = 0;

	constructor(public name: string) {
	Cat.count++;
	}

	getName() {
	return this.name;
	}