var products = [ Product(name: "Kayak", description: "A boat for one person",price: 275, stock: 10), Product(name: "Lifejacket", description: "Protective and fashionable",price: 48.95, stock: 14), Product(name:…
转载:https://useyourloaf.com/blog/swift-guide-to-map-filter-reduce/ Using map, filter or reduce to operate on Swift collection types such as Array or Dictionary is something that can take getting used to. Unless you have experience with functional lang…
Swift’s API includes many functions and instance methods that reflect its functional programming heritage. A prime example is called reduce. You can reduce a collection of values down to just one value, such as calculating the sum of every person’s…
感觉自己给自己释疑,也是一个极为有趣的过程.这次,我还新增了"猜想"一栏,来尝试回答一些暂时没有足够资料支撑的问题. Swift 版本是:4.0.3.不同版本的 Swift,可能无法复现问题. 个人记录,仅供参考,不保证严格意义上的正确性. swift 中,如何在函数内,声明 static 变量 ? 问题描述: 以下语句,是编译不过的,提示:"static properties may only be declared on a type" func add() -…
原创Blog,转载请注明出处 blog.csdn.net/hello_hwc 前言:和OC不同,Swift有非常多全局的函数,这些全局函数对简化代码来说非常实用.眼下Swift出到了2.0,只是我这篇文章还是用Swift1.2写的演示样例代码. Count-统计数量 文档 func count<T : _CollectionType>(x: T) -> T.Index.Distance Description Return the number of elements in x. O(1…
