Simon Willison’s Weblog

Does creating a zip file with php use more RAM then CPU? Or vise versa? Also, is it faster to use a system call, or the php zip library? Exec (zip filename.zip) vs. $zip =new ZipArchive().

You can find out the answer yourself using a very simple benchmark—just call time() before and after each option and loop them a few thousand times to calculate an average.

How do professionals build and maintain their websites?

The HTML and CSS for large, professional websites is usually written by hand, in a text editor. Tools like Dreamweaver are avoided by most skilled web developers.

I have an idea for a website, with an idea for eventually having cashflow out of it? However, my skills are insufficient to build it and I have no money at all to hire someone—what’s my best starting point?

You either need to learn some skills, or you need to earn some money. Sadly, having a good idea is not enough—you need to be able to execute it as well.

What are the good practices to design responsive emails compatible with all email clients?

The biggest challenge for any kind of email design is definitely testing. We’ve had great experiences using Litmus for testing—it shows you what your email looks like in dozens of different webmail providers and mobile devices.

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4:18 pm / 24th July 2013 / webdevelopment, quora

What technologies were used in developing web applications in the ’90s?

Perl. Lots of Perl. There was a site called Matt’s Script Archive which was full of terribly written Perl scripts for things like hit counters and form emailers and guest books. It was very popular.

Is there an alternative to media queries for responsive design?

Yes: use percentage measurements for your layout components. That way you can build a website that works on a much larger range of screen sizes. You can combine this approach with media queries—for example, you could specify that your site has a 25% wide navigation menu and a 75% wide content area on devices that are wider than 400px, but any smaller than that and it collapses to a single column layout with the menu hidden and accessible only through a menu bar icon.

What advice would Simon Willison give to a beginner Python/Django developer?

Build something and put it on the internet. Make sure you have an easy way to deploy new versions (Heroku is a good bet if you don’t want to figure out Fabric). Pick a project that’s useful to you—a simple blogging engine is often a good bet, or maybe something that aggregates together your posts from Twitter and Instagram and so on. Or come up with something a bit more creative!

How is Web engineering related to Software engineering?

I’d describe it as a subset of software engineering that deals with issues relating to the web—web application development, web protocols, browsers and so on.

What are useful tools for building out web app Infrastructure?

First, make sure you know your way around a command automation tool, such as Fabric (Python) or Capistrano (Ruby).

How can you assign routes for a website in a .net environment?

You’ll have a much easier time of it if you use paths that start at the root rather than relative paths, eg <a href="/foo/bar/"> instead of <a href="../bar/">

Where can I find an updated DB of countries, states and cities?

This is a surprisingly complicated question. The first thing you might want to ask yourself is “what’s a country”—how do you deal with places on this List of states with limited recognition for example?

What’s the best platform I can use for a food delivery startup? Shopify? Or should I instead learn to code?

Don’t build an e-commerce system as your first programming project—I know engineers with many years of experience who wouldn’t trust themselves to write code that handles money.

What are the best web design and web development conferences/ meetups in Central & Eastern Europe (2013)?

We have a list of Web Design conferences and events in Central and Eastern Europe on Lanyrd—you might find our full list of Conferences in Central and Eastern Europe useful as well.

What are the best books/tutorials to begin learning about memcached?

There isn’t really enough of memcached to justify a whole book—it’s a pretty straight-forward API.

How do I get started with node.js?

You don’t run Node.js in a script tag on your website. Node is a technology for writing servers in JavaScript—you can think of it as a replacement/alternative for PHP, Python, Ruby, ASP.NET etc.

Which web/software development conferences a student should attend and why?

Offer to volunteer at conferences. If accepted, you’ll get in for free and you’ll get to meet loads of people (including spending time with the speakers)—in exchange for a full days work manning desks, finding speakers in time for their talks, giving people directions and generally helping organise and clean things up.

Does it still make sense to become a Java developer, or should I migrate to PHP or .NET?

It sounds like you need to expand your horizons a little further. The best programmers I know these days aren’t working solely in Java, PHP or .NET—they may use one those languages, but they’ll also be getting stuck in to dynamic languages such as Python, Ruby, JavaScript or Scala.

What are the strategies for a front end developer to keep up to date with the emerging technologies?

Step one: find developers who you respect and subscribe to their blogs, follow them on Twitter/Google+/etc and try to understand what they are talking about and what they think is exciting.

How can I detect manual record insert from mysql cansole into my code in django .?

You can’t. The best you can do is have Django periodically poll MySQL to see if anything has changed (maybe with a custom management command run by cron)—having a TIMESTAMP field on every table which will be automatically set to the current time when a record is inserted will help you spot things that have changed.

Which are the best front-end schools in London, UK?

General Assembly in Clerkenwell run several intensive courses relating to front-end web development that look very good.

What will HTTP be superseded by?

HTTP 1.x will likely never be completely replaced, but there is ongoing work at the moment to define HTTP 2.0. The first draft of this was released in November and is based on Google’s SPDY protocol, which is already widely deployed in Google Chrome and Google’s web properties (other browsers have experimented with support for SPDY as well): http://en.m.wikipedia.org/wiki/H...

Which language and framework would you use today?

Unless I had a very good reason to use something else (a pure websocket/real-time collaboration app perhaps) I’d go with stock Django on PostgreSQL and maybe a bit of Redis. Simple, powerful, stable and works reliably.

What are good ways to develop software architectures using multiple languages?

There are a bunch of options for communicating between different languages, but these days the simplest is definitely JSON—it maps directly to common data structures in PHP, Python, Ruby and so on. Treat it as your common interchange format and you can’t go far wrong. It’s very easy to build simple internal web services on top of JSON.

If I study HTML5, can I avoid having to learn javascript?

Many of the most exciting new features that fall under the term HTML5 only make sense in the context of JavaScript—things like Canvas, Web Workers, AppCache and so on. So no, you can’t learn HTML5 properly without getting familiar with JacaScript.

How can some really large services (like Dropbox) afford to use Python as a primary language, if it’s one to two orders of magnitude slower than other, compiled languages?

Because raw language speed often doesn’t matter that much. In the case if Dropbox the client software spends most of its time waiting for bits to load from the network or from disk. Most large websites spend their time waiting for the database. You can’t speed up network or disk performance by using a faster language.

How do I really learn coding?

Build real websites. Find a project and work on it. A personal blog is a great project as it can be simple to start with and get more complex over time.

Django (web framework): What are the Best Practice For Displaying another Website from yours?

This isn’t really a Django-specific question—the answer would be the same no matter what server-side tech you use.

Can you recommend a few video lectures on web application design with Redis?

We have a collection of 27 videos of conference talks that cover Redis on Lanyrd, gathered by our community: Redis Videos | Lanyrd

What are some apps, problems you would suggest to solve a new python developer?

The best way to learn python in my opinion is using the interactive prompt. Install ipython (a massive improvement on the standard python shell) and use it to interactively solve some simple tasks—things like downloading a CSV file from the web using the urllib library, parsing it with the csv module, then poking around in the data using python list comprehensions and saving some of the results out to a JSON file.

Can you mark items on a website as ’unread’ without cookies?

It’s not very exciting, but CSS will let you set different styles for visited vs unvisited links and the technique has worked reliably since the mid 1990s.