HaoIne

Bits and Bytesbit stand for binary digit, and one byte is an 8-bit group. ASCIIASCII stands for American Standard Code for Information Interchange. This is a 7-bit code, meaning there are 2^7 or 128 available codes. It’s composed of two part, printable character and unprintable character. ParityIn ASCII, we use 7 bits, and there is one bit unused, just for Parity. Parity is a simple error-detection method used in digital communication and storage.We add one extra bit (called the parity bit)...

Now it’s 2024-9-21, I’ve been reading the book Computer Science from the Bottom Up I’m reading this book with destinations below: To learn the base of computer architecture and composing, operating system and assembly. To improve my English reading ability. And of course, as the first English book I’m reading, this task could be tricky, and the experience may be painful. I would be struggling with those tricky words, complex terms and long sentences. So, as the start, completely...

Tody, Sept 21, 2025, I’m learning assembly from Pwn.college. IntroCome on, Assembly is named “Assembly” because it is assembled (not compiled) into binary code.The inventor is Kathleen Booth.Assembly is the simplest programming language.So You can master assembly in a week!Assembly tells computer what to do, with a Noun/Operands, and Verbs/Operators.There are tow syntaxes of x86 assembly, AT&T and Intel. DataBinaryA binary digit is called a bit.And a byte is a 8-bits...

“SVG” stands for “Scalable Vector Graphics”. Vector graphics are images defined by a grid of pixels. SVGs are often used for: Icons Graphs/Charts Large, simple images Patterned backgrounds Applying effects to other elements via SVG filters

Web100%的⚪打开网站之后发现提示：画出圆形就给flag。

An object is like a cabinet with signed files. Every piece of data is stored in its file by the key. key is a string (also called a “property name”), and value can be anything. An empty object (“empty cabinet”) can be create using one of two syntaxes: 12let user = new Object(); // "object constructor" syntaxlet user = {}; // "object literal" syntax Literals and properties1234let user = { // an object name: "John", // by key...

DOM is the Document Object Model. Targeting nodes with selectorsWe could use the selectors target at nodes in the tree of DOM, just like the selectors in CSS; example: div.display .display #container > .display div#container > div.display DOM methodsWhen your HTML code is parse by a web browser, it is cconverted to the DOM. Now these nodes are JavaScript objects that have many properties and methods attached to them. These properties and methods are the primary tools we are going to...

In JavaScript there is two different standards for the codes. One is the non-strict mod, and another is the strict mode. The strict mod limits the scope of a variable or a function to the block they nest in, while the non-strict mode doesn’t. Why should there be two different mod?Because the non-strict mode is the initial style when JS is newly created. And upon it is widely used, the problem of non-strict style imerged. So developments need to change it, but there are still so many old...

Flexbox is a way to arrange items into rows or columns. These items will flex based on some rules that you can define. Flexbox is not just a single CSS property but a whole toolbox of properties that you can use to put things where you need them. Some of these properties belong on the flex container, while some go on the flex items. This is an important concept. Flex container: any elements that has display: flex on it. Flex item: any element that lives directly inside of a flex...

The Box Model We could consider all the elements in the website a box. Yes, they are rectangular boxes, nesting in an other box, and lying beside an other box. Here we use padding, border, and margin to manipulate the size of these boxes, and the space between them. padding increases the space between the border of a box and the content of the box. border adds space (even if it’s only a pixel or two) between the margin and the padding margin increases the space between the borders of a box...