Older Swift code uses completion handlers for notifying us when some work has completed, and sooner or later you’re going to have to use it from an async function –&nbs...

Many of Apple’s frameworks report back success or failure using multiple different delegate callback methods rather than completion handlers, which means a simple continuation won...

You can loop over an AsyncSequence using Swift’s regular loop types, for, while, and repeat, but whenever you read a value from the async sequence you mus...

Swift does not provide a built-in way of converting an AsyncSequence into a regular Sequence, but often you’ll want to make this conversion yourself so you don’t n...

Swift’s actors are conceptually like classes that are safe to use in concurrent environments. This safety is made possible because Swift automatically ensures no two pieces of cod...

Both Swift Testing and XCTest give us three main options for handling errors in tests: we can consider them immediate failures, we can handle them internally and make our own asser...

普通报销单表头添加经费来源，最终的效果如下图所示 普通报销单表头添加经费来源 录入页面 当选择经费来源字段时，表头后添加 [经费来源值]。 打开 webmain/flow/input/inputjs/mode_putong.js ...

时间格式 严重事件发生时间格式 2024/01/03或者 NA，不能是其它格式，比如 2024-01-03。 Excel 单元格换行 Excel 单元格中，不能出现换行。 单元格出现换行 转归列 转归所在的列为单选，选项出...

AI 技术名词 AI 中常见的技术名词如下 人工智能：AI - Artificial Intelligence 大语言模型：LLM - Large Language Model 自然语言处理：NLP - Natural Language Processing 机器学习：ML - Mac...

基本数据类型 String 字符串下标 字符串的下标 Subscripting可以提取字符串特定位置的字符。 # 提取第一个字符 print('Hello'[0]) # H # 提取最后一个字符 print('Hello'[len('Hello') - 1]) # ...