Shi Haohong shhider

To test if a bit is set:

if ((mask & flag) != 0) {
  // bit is set
} else {
  // bit is not set
}

性能指标：评价一个系统的性能，需要选择一个或多个指标。eg. Git 选择以「合并分支」作为性能指标，ref: 为什么你应该使用 Git 进行版本控制

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.

Element

Box metrics

elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent
elem.clientLeft, elem.clientTop, elem.clientWidth, elem.clientHeight
elem.getClientRects(), elem.getBoundingClientRect()

01. 实现脚本

通过 AppleScript 脚本实现，脚本代码如下：

tell application "Google Chrome"
    set current_tab to active tab in the front window
    set the_url to the URL of current_tab
 tell application "Safari" to open location the_url

Array

ES5 provides follow some useful Array methods, these are all available in modern browsers(>= IE9):

Array.isArray
Array.prototype.forEach
Array.prototype.map
Array.prototype.every
Array.prototype.some

	// Copyright (c) 2012 Sutoiku, Inc.

	// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

	// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE O

	// Copyright (c) 2012 Sutoiku, Inc. (MIT License)

	// Some algorithms have been ported from Apache OpenOffice:

	/**************************************************************
	*
	* Licensed to the Apache Software Foundation (ASF) under one
	* or more contributor license agreements. See the NOTICE file
	* distributed with this work for additional information
	* regarding copyright ownership. The ASF licenses this file

	/**
	* 传入两个范围字符串，返回交集；无交集或异常情况返回 null。
	* - 如果要考虑整行整列，通过解析为 Range 对象来处理会更清晰。
	*/
	function intersection(rangeA: string, rangeB: string): string \| null {
	const splitedA = splitRangeStr(rangeA)
	const splitedB = splitRangeStr(rangeB)
	if (!splitedA \|\| !splitedB) {
	return null
	}


	# update version
	npm version patch <=> z++
	npm version minor <=> y++ && z=0
	npm version major <=> x+= && y=0 && z=0

	# publish
	npm publish

	# done!