PRODUCTS • CONSULTING • APPLICATION MANAGEMENT • IT OPERATIONS • SUPPORT • TRAINING Unleash your inner author How to Avoid the “Trigger Trap” @juneih #phpuk2013

Unleash your Inner Author Chapter 1 The paradox of writing and reading code Chapter 2 Four facts about the brain Chapter 3 The trigger trap Chapter 4 Writing tips for the programmer

The paradox of writing and reading code

The paradox of writing and reading code Me on the subway

The paradox of writing and reading code Everyone else on the subway

The paradox of writing and reading code

The paradox of writing and reading code

Four facts about the brain

Four facts about the brain

Four facts about the brain Which number sequence will be printed here?

Four facts about the brain

Four facts about the brain

Four facts about the brain

Four facts about the brain

Four facts about the brain

The Trigger Trap

The Trigger Trap

The Trigger Trap

Writing tips for the programmer

Shorter is better class DrugStrengthFormCountryManufacturerPharmacyCopayProductPriceFactory { public function getSalesOrderProductSupplierCopayDrugStrengthFormCountryManufacturerPharmacyCop ayProductPrice( SecurityContext $securityContext, SalesOrderProductSupplier $salesOrderProductSupplier, Organization $copay) { /* some code here */ } }

Shorter is better class ProductPriceFactory { public function getProductPrice ( SecurityContext $security, ProductSupplier $productSupplier, Organization $copay) { /* some code here */ } }

Simpler is better Nested ternaries – hard to read: $speed = isset($js_options['speed'])? is_numeric($js_options['speed'] )? $js_options['speed'] : "'". $js_options['speed'] ."'": "'normal'"; Better use of a ternary: $temperature = strpos($month, 'r') ? 'cold' : 'warm'; ?>

Writing is rewriting ● DrugStrengthFormCountryManufacturerPharmacyCopayProductPriceFactory ● DrugStrengthFormCountryManufacturerPharmacyProductPriceFactory ● CountryManufacturerPharmacyProductPriceFactory ● ProductPriceFactory

Let structure control your line of thought public function execute( ) { switch ($this->getPrefix()) { case "STATUS": return $this->adminStatus(); default: return $this->subscribe(); } }

Writing tips for programmers ● Shorter is better ● Simpler is better ● Writing is rewriting ● Let the structure control your line of thought

Look up

Unleash your inner Author

Sources Thinking, fast and slow - Daniel Kahnemann Brain rules – John Medina Back of the napkin – Dan Roam Elephant: http://files.phpclasses.org/graphics/phpclasses/elephpant.png Superhero: http://www.eschrade.com/wp-content/uploads/2011/12/superhero-white-bkg.png Writing Tips: 12 tips til skribenten, Gudmund Hernes, Morgenbladet The art of readable code: Dustin Boswell, Trevor Foucher http://thedailywtf.com/Comments/Really-Descriptive-Names.aspx I hate reading other people's code: http://abstrusegoose.com/432