
Introducing Go: Build Reliable, Scalable Programs

The top-level namespaces are modules. By default, your app is a module and hence a namespace; that namespace’s name is, roughly speaking, the name of the app.
Matt Neuburg • iOS 11 Programming Fundamentals with Swift: Swift, Xcode, and Cocoa Basics
Denis Nazarov • What comes after open source? — Denis Nazarov
Well, here’s the big secret behind the puts method: before puts tries to write out an object, it uses to_s to get the string version of that object. In fact, the s in puts stands for string; puts actually means put string.
Chris Pine • Learn to Program
Except we’ll talk about the vertical-bar-thingies, like in |lang|. It looks weird, but the idea is simple: lang is the variable that each will use to point to the objects in the array. How would you otherwise refer to the string "English"? (Well, maybe using languages[0], but the entire point here was to avoid messing with the slot number
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