This week we are joined by Tammy Coron and Greg Heo. We follow up on Learning to Learn, a MacBook Pro saving a life, where Apple products are made and the math behind a 5-star rating. This week marked the 10 year anniversary of the iPhone announcement by Apple. So we asked listeners and friends to tell us what the iPhone has meant to them. We hear from Kim Ahlberg, Justin Stanley, Aaron Douglas, Peter Cook, George Stroumboulopoulos, Jaime Lopez Jr and Rich Turton. We talk about Phil Schiller’s press tour on the iPhone early history as well as some recent turnaround in iPhone sales and market growth. We speculate Chris Lattner’s move to Tesla. Cloud storage is mentioned. Picks: Kaleidoscope, Hyperdrive USB Hub

Mark’s Notes:

// For x 5 stars, and 1 1 star, the average is:
Ave = (5x + 1) / (x + 1)
// Solve for x to get the number of 5 stars needed to achieve this Ave with 1 star:
5x + 1 = (Ave)x + Ave
(5 - Ave)x = Ave - 1
x = (Ave - 1) / (5 - Ave)
// So to get Ave = 4.75, with 1 1-star, you need:
x = 15  5 stars
// And to get Ave = 4.5, you need:
x = 7  5 stars

Greg’s Version:

// Say you have one 5-star and one 1-star. What’s the average?
(1 + 5) ÷ 2 = 3 stars! // How horrible!
// Then you get another 5-star review. Your new average:
(1 + 5 + 5) ÷ 3 = 3.7 stars. // Getting better.
/* So you could just keep adding another 5 and increasing the number after the ÷ until you hit 4.5.
As Mark says, 7 5-star reviews is the magic number to get back up to four and a half: */
(1 + 5 + 5 + 5 + 5 + 5 + 5 + 5) ÷ 8 = 4.5

Episode 126 Show Notes

• Learning How to Learn: Powerful mental tools to help you master tough subjects
• MacBook Saves Man’s Life During Fort Lauderdale Shooting
• Blackbox – think outside the box
• Roundabout: Creative Chaos – Episode 75 – Ryan McLeod
• Apple seeks clearance to make more products in USA, but gives very unexciting example
• AT&T raising prices for grandfathered users
• iPhone
• Palm Treo
• Phil Schiller on iPhone’s Launch, How It Changed Apple, and Why It Will Keep Going for 50 Years
• iPhone market share grows 6.4% in USA, takes share from Android in most markets
• Apple on track to reach ONE TRILLION DOLLARS in total iPhone revenue
• [swift-evolution] Update on the Swift Project Lead
• The guy who created one of Apple’s most beloved technologies is leaving Apple
• Apple’s Mac Pro, Touch Bar MacBook and original Air designer, Matt Casebolt, will now be designing Teslas
• So You Want to Be a (Compiler) Wizard
• Setapp – YOUR SHORTCUT TO PRIME APPS FOR MAC.
• Kaleidoscope — File comparison for Mac
• SICP 6.001
• MITOpenCourseware – Video Lectures
• The Strombo Show app

Episode 126 Show Picks

• Pick: HyperDrive: Thunderbolt 3 USB-C Hub for 2016 MacBook Pro
• Pick: Kaleidoscope: Implementing a Language with LLVM

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