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Singapore chapitre #4 - You don't know

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Information about Singapore chapitre #4 - You don't know
Technology

Published on February 25, 2014

Author: while_42

Source: slideshare.net

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About while42 0. FRENCH ONLY TO BECOME A MEMBER OF WHILE42 YOU SHOULD BE EITHER A FRENCH TECH OR SOMEONE SPEAKING FRENCH AND HAVING A COMPUTER SCIENCE DEGREE DELIVERED BY A FRENCH SCHOOL / UNIVERSITY. 1. TECH ENGINEERS ONLY ALL WHILE42 MEMBERS ARE TECH ENGINEERS (DEVELOPERS, OPS, DEVOPS, SYS-ADMIN, INGENIEURS INFORMATICIENS, CTO ...) AND/OR HAVE A DEGREE FROM A FRENCH ENGINEERING TECH SCHOOL (EPITECH,SUPINFO, EPITA, ...). THERE IS NO FILTER BY DEGREE OR SCHOOL. YOU DO NOT HAVE TO HAVE A DEGREE TO JOIN AS SOON AS YOU ARE A TECH ENGINEER (AND FRENCH). 2. REAL NETWORK, REAL PEOPLE EVERYBODY SHOULD KNOW EACH OTHERS IN EACH CHAPTER. THE GOAL IS NOT TO BE AS BIG AS POSSIBLE. WE DO NOT WANT TO BE A BIG ORGANIZATION WHERE YOU DON’T KNOW WHO IS STANDING NEXT TO YOU. THUS WE WILL NEVER BE VERY BIG PER CHAPTER AND EACH CHAPTER IS GROWING SLOWLY AFTER THE FIRST 50 MEMBERS.

You don’t know! WHAT YOU DON’T KNOW MIGHT KILL YOUR SKILLS AND KILL YOUR PROJECT

Performance = CPU? Rarely is the processor the bottleneck, but so many people look to 'tight loops' to speed up performance when it's often an I/O issue. If RAM was an F-18 Hornet with a max speed of 1,190 mph (more than 1.5x the speed of sound), disk access speed is a banana slug with a top speed of 0.007 mph.

Speed is important, isn’t it? 30 search answers (half a second increase in load time) = -20% traffic and revenue for Google    All is ok < 0.1s Flow of thought uninterrupted < 1.0s 10s < Attention focused lost Google quote: “…we've decided to take site speed into account in our search rankings” Your users are stupid. Really stupid. You are wrong: In 2009 Google tested 41 shades of blue on a button to see which one was the most effective at getting clicks

Programming != software engineering • Many newer developers have difficulty in depicting and understanding dependencies and diagnosing/debugging them throughout a system • It's no longer about processing data or writing your program from a blank slate: • • • It's about teaching the novice how to use the interface first then getting them familiar with what they need to add to the generated code Once you're by that, you can start to teach them how use the programming language to help them get the task done.

What this?

What happened to the flowcharts? • This is the 'No time to do it right, plenty of time to do it over' method. • It always takes longer. • It's hard to resist the pressure of those who demand 'Why aren't you coding yet?' but one should. • Stop assuming you would always remember every line you wrote after your first year and always code as if the person who ends up maintaining your code is a violent psychopath who knows where you live

In general • DRY - Don’t repeat yourself • Code Reuse is Good • Avoid Creating a YAGNI (You aren’t going to need it) • KISS (Keep it simple, stupid!) • Do the simplest thing that could possibly work • Don’t make me think • Principle of least astonishment (side effects to avoid) • Single Responsibility Principle • Avoid Premature Optimization

Some sources http://googleresearch.blogspot.com/2009/06/speed -matters.html http://googleblog.blogspot.com/2008/08/searchexperiments-large-and-small.html http://code.google.com/speed/ http://glinden.blogspot.com/2006/11/marissamayer-at-web-20.html

Some sources http://googleresearch.blogspot.com/2009/06/speed -matters.html http://googleblog.blogspot.com/2008/08/searchexperiments-large-and-small.html http://code.google.com/speed/ http://glinden.blogspot.com/2006/11/marissamayer-at-web-20.html

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