Главная » Ссылки с тэгом "программирование" - страница 2

Ссылки с тэгом "программирование" - страница 2 

Визуальное представление работы команды JOIN языка SQL

В очень простой форме (собственно в виде примеров в картинках) показано как работают различные JOIN'ы в SQL.

I thought Ligaya Turmelle's post on SQL joins was a great primer for novice developers. Since SQL joins appear to be set-based, the use of Venn diagrams to explain them seems, at first blush, to be a natural fit. However, like the commenters to her post, I found that the Venn diagrams didn't quite match the SQL join syntax reality in my testing.

I love the concept, though, so let's see if we can make it work. Assume we have the following two tables. Table A is on the left, and Table B is on the right. We'll populate them with four records each.

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Теги: mysql, sql, программирование, уроки, шпаргалки,

Facebook Timeline Design using JQuery and CSS

I know what my readers are expecting from 9lessons blog, after long time I'm going to discuss about Jquery usage. Facebook timeline design makes big revolution in social networking world and it gives new feel to the user profile pages. In this post I want to explain how simple I had implemented this design with Jquery and CSS. Try this demo with modern browsers like Chrome, Firefox and Safari (IE is dead).

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Теги: css, html, jquery, верстка, дизайн, креатив, программирование, уроки,

22 Most Popular jQuery Plugins of 2011

Since jQuery was released in 2006, it has changed the way we think of JavaScript. And because of its simplicity, it has motivated many enthusiastic developers to create thousands of useful plugins and extends its functionality. Now, lets go through some of the most popular jQuery plugins of 2011 as It's almost over.

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Теги: javascript, jquery, программирование, халява,

HTML5 Canvas & Processing JS

When I first sat down to redesign my personal site I knew that I wanted to incorporate HTML5 Canvas somewhere in the layout. The problem was that I hadn't worked with canvas before and had to start from scratch. I went through the pain of learning every aspect of adding text, drawing shapes, importing image, etc... before I found the amazing canvas framework Processing.JS

 For those who don't quite fully grasp what HTML5 Canvas check out the W3Schools entry for the element before reading any further, but it's basically an element that defines graphics.

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Теги: html, javascript, броузеры, верстка, программирование, уроки,

ACE - Редактор кода на JavaScript

Ace is a standalone code editor written in JavaScript. Our goal is to create a web based code editor that matches and extends the features, usability and performance of existing native editors such as TextMate, Vim or Eclipse. It can be easily embedded in any web page and JavaScript application. Ace is developed as the primary editor for Cloud9 IDE and the successor of the Mozilla Skywriter (Bespin) Project.

Main features

  • Syntax highlighting
  • Auto indentation and outdent
  • An optional command line
  • Work with huge documents (100,000 lines and more are no problem)
  • Fully customizable key bindings including VI and Emacs modes
  • Themes (TextMate themes can be imported)
  • Search and replace with regular expressions
  • Highlight matching parentheses
  • Toggle between soft tabs and real tabs
  • Displays hidden characters
  • Highlight selected word 

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Теги: cms, ide, javascript, программирование, халява,

How to make people login into your website with their Google account

OpenID provides a safe, elegant and easy way for people to login into your website without having to fill in a registration form. They just have to have an account to one OpenID provider, a Google account for instance, and they will login into your site with this account.

I will show you how to implement it with Google accounts, but the source code is exactly the same for other providers (such as Yahoo!), you just have to change the URLs.

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Теги: google, php, программирование, уроки,

Five common PHP design patterns

Design patterns were introduced to the software community in Design Patterns, by Erich Gamma, Richard Helm, Ralph Johnson, and John Vlissides (colloquially known as the "gang of four"). The core concept behind design patterns, presented in the introduction, was simple. Over their years of developing software, Gamma et al found certain patterns of solid design emerging, just as architects designing houses and buildings can develop templates for where a bathroom should be located or how a kitchen should be configured. Having those templates, or design patterns, means they can design better buildings more quickly. The same applies to software.

Design patterns not only present useful ways for developing robust software faster but also provide a way of encapsulating large ideas in friendly terms. For example, you can say you're writing a messaging system to provide for loose coupling, or you can say you're writing an observer, which is the name of that pattern.

It's difficult to demonstrate the value of patterns using small examples. They often look like overkill because they really come into play in large code bases. This article can't show huge applications, so you need to think about ways to apply the principles of the example -- and not necessarily this exact code -- in your larger applications. That's not to say that you shouldn't use patterns in small applications. Most good applications start small and become big, so there is no reason not to start with solid coding practices like these.

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Теги: php, программирование, уроки,

50 free E-books for PHP development

Electronic books are digital publication, in other words e-books are some sort of digital book which contains text, images, graphs etc. like normal book but can be read only via a computer or other similar electronic devices. The Oxford Dictionary of English defines the e-book as “an electronic version of a printed book”, but it’s not necessary to always have printed version of e-book. To read a e-book on computers or mobile devices, you need a e-book reader which mostly is a PDF reader ( most of the e-books come into PDF format). Over 3 million of e-books are available as at the end of the year 2010, E-book websites can include the ability to translate books into many different languages, making the works available to speakers of languages not possible easily by printed translations.

An e-book can be purchased/borrowed, downloaded, and used immediately unlike printed books which you need to buy or borrow from the library first. Despite being popular e-books have their limitations too, you can not find every printed book as e-book, once the e-book corrupted you can’t gain access to its content means printed publication has more life than e-book.

However, Today we are presenting 50 Free E-books for PHP Development, these are the great resources to learn PHP or enhance your PHP skills.

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Теги: php, программирование, уроки, халява,

An Alternative to Pagination : Facebook and Twitter Style

As your website grows, it is no longer practical to display all the data at once on the same page. Moreover, the end user will probably be interested with only part of the content. Also, loading all the content at once might increase the server load or simply a waste of bandwidth. This is where pagination comes into play.

First, I am not too sure how you should call this thing that you are going to learn about but its goal is similar to a usual pagination, That is, to display partial content and to save bandwidth! This article is about how to create a similar stuff to twitter and Facebook’s way of displaying data.

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Теги: ajax, css, html, javascript, jquery, php, программирование, уроки,

Free Contact Form PHP Script

Fast Secure Contact Form – Free PHP Script by Mike Challis

Fast Secure Contact Form PHP Script allows a user to easily create and add contact forms to a web page. The form will let the user send emails to a site’s admin. An administration panel is present, where the user can create and preview his forms.

Features a super easy admin panel, multi-form feature, autoresponder, no templates to mess with, and an option to redirect visitors to any URL after the message is sent. Includes CAPTCHA and Akismet support to block all common spammer tactics. Spam is no longer a problem. You can add extra fields of any type: text, textarea, checkbox, checkbox-multiple, radio, select, select-multiple, attachment, date, time, hidden, password, and fieldset.

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Теги: php, программирование, халява,

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