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What’s the performance cost of calling an async function? 调用 async 函数的性能成本是多少？
Whenever we use await to call an async function, we mark a potential suspension point in our code – we’re acknowledging that it’s entirely possible our function w...
1年前How to call an async function using async let 如何使用 async let 调用 async 函数
Sometimes you want to run several async operations at the same time then wait for their results to come back, and the easiest way to do that is with async let. This lets you start...
1年前Sending data safely across actor boundaries 跨参与者边界安全地发送数据
Swift tries to ensure access to shared data is done safely, partly through types such as actors, and partly through a concept of sendability implemented through the ...
1年前
How to fix the error “async call in a function that does not support concurrency” 如何修复错误 “async call in a function that does not support concurrency”
This error occurs when you’ve tried to call an async function from a synchronous function, which is not allowed in Swift – asynchronous functions must be able to suspend the...
1年前How to create a custom AsyncSequence 如何创建自定义 AsyncSequence
There are only three differences between creating an AsyncSequence and creating a regular Sequence, none of which are complicated.创建 AsyncSequence 和创建...
1年前What are tasks and task groups? 什么是任务和任务组？
Using async/await in Swift allows us to write asynchronous code that is easy to read and understand, but by itself it doesn’t enable us to run anything concurrently – even w...
1年前How to make a task sleep 如何使任务进入休眠状态
Swift’s Task struct has a static sleep() method that will cause the current task to be suspended for a set period of time. You need to call Task.sleep()&n...
1年前
4. ① 列出产品
1年前
匿名函数
匿名函数：没有名字的函数。 语法 基本语法 val anonymousFunction = fun(parameters): ReturnType { body return statement if needed} 示例代码 val numbers =...
7个月前
Data Class 数据类
Kotlin 中的 数据类（data class） 是一种用于只存数据的类，能够自动生成常用的函数。 equals() hashCode() toString() copy() 语法 data class ClassName( val prop: Type, var prop2: Type )...
6个月前