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2018 05-11 the way we teach tech - phpday
- 1. PHPDay 11-05-2018 The way we teach tech Jeroen van der Gulik
- 2. About me ❖ Software Architect/ Consultant ❖ Co-Founder Isset (https://isset.nl) ❖ Señor Developer ❖ Organizer DDDNL ❖ Builder of Artificial Stupidity ❖ @n0x13
- 4. shōnen 少年漫画
- 5. boy 少年漫画
- 33. <html> <head> <title>My first project</title> </head> <body> <?php echo '<p>Hello World<p>'; ?> </body> </html>
- 35. Parse error: syntax error, unexpected 'echo' (T_ECHO), expecting ',' or ‘;' in hello_world.php on line 6
- 52. Medior
- 53. Senior
- 54. Stages of Problem Solving ❖ I just want to solve my problem ❖ I want to understand my problem ❖ I want to be pointed into the right direction and given options
- 56. Context depends on ❖ Knowledge ❖ Experience ❖ Time ❖ Pressure ❖ Interest
- 57. No Knowledge Some Knowledge Knowledgable Just solve my problem √ Understand my problem √ I want options √
- 58. final class Example { public function doSomething() { $this->doAThingThatSometimesFails(); } }
- 59. – John Doe (Jr. Developer) “I want to log errors”
- 60. – Sansa Stark (Sr. Developer) “Great ! Have you thought about ELK, Syslog, Splunk or Kafka ?”
- 63. final class Example { public function doSomething() { try { $this->doAThingThatSometimesFails(); } catch (Throwable $throwable) { file_put_contents( realpath('var/log/my.log'), $throwable->getMessage() . PHP_EOL, FILE_APPEND ); } } }
- 64. final class Example { public function doSomething() { try { $this->doAThingThatSometimesFails(); } catch (Throwable $throwable) { file_put_contents( realpath('var/log/my.log'), $throwable->getMessage() . PHP_EOL, FILE_APPEND ); } } }
- 65. final class Example { public function doSomething() { try { $this->doAThingThatSometimesFails(); } catch (Throwable $throwable) { file_put_contents( realpath('var/log/my.log'), $throwable->getMessage() . PHP_EOL, FILE_APPEND ); } } }
- 66. final class Example { public function doSomething() { try { $this->doAThingThatSometimesFails(); } catch (Throwable $throwable) { file_put_contents( realpath('var/log/my.log'), $throwable->getMessage() . PHP_EOL, FILE_APPEND ); } } }
- 68. – Alice Wonderland (Code Reviewer) “What if we want to change the location?”
- 69. Code Review
- 72. – Alice Wonderland (Code Reviewer) “Ok much better ! But global variables are tricky…”
- 74. – Alice Wonderland (Code Reviewer) “What if we want to log to something else than file?”
- 75. interface Logger { public function log($message); }
- 76. final class FileLogger implements Logger { private $pathToLogFile; public function __construct(string $pathToLogFile) { $this->pathToLogFile = $pathToLogFile; } public function log($message) { file_put_contents( realpath($this->pathToLogFile), $message, FILE_APPEND ); } }
- 77. final class Example { private $logger; public function __construct(Logger $logger) { $this->logger = $logger; } public function doSomething() { try { $this->doAThingThatSometimesFails(); } catch (Throwable $throwable) { $this->logger->log($throwable->getMessage()); } } }
- 78. – Alice Wonderland (Code Reviewer) “Did you know there was a standard for this?”
- 80. – Alice Wonderland (Code Reviewer) “Do you know about decorators?”
- 81. interface DoSomething { public function doSomething(); }
- 82. final class LoggableExample implements DoSomething { private $example; private $logger; public function __construct(Example $example, LoggerInterface $logger) { $this->example = $example; $this->logger = $logger; } public function doSomething() { try { $this->example->doSomething(); } catch (Throwable $throwable) { $this->logger->error($throwable->getMessage()); } } }
- 83. final class Example implements DoSomething { public function doSomething() { $this->doAThingThatSometimesFails(); } }
- 85. We explained ❖ Why global variable (state) is bad ❖ Why Dependancy Injection is good ❖ Why Interfaces are good ❖ Why Single Responsibility is good ❖ Why Decorator is useful (sometimes)
- 86. Learning or Teaching opportunities
- 87. dev-books.com
- 88. Pair Programming
- 90. Meetups
- 91. The Pac-Man Rule
- 92. EventStorming
- 93. Conferences
- 96. Absolutes
- 100. – Robert Martin a.k.a. Uncle Bob “The number of programmers doubles every 5 years. That means, at any time, half the world's programmers have less than 5 yrs experience”
- 101. The way we should teach tech ❖ People learn best 1 step at the time ❖ Find opportunities to learn or teach ❖ Find mentors/mentees ❖ Create your own Seniors ❖ Never stop learning