safeTrim trims a nullable string, defaulting to empty if null. Perfect for a form processor cleaning user input—null or not, it's handled smoothly with Kotlin's Elvis operator. Extension Function for Custom ClassesCustom classes can sprout new abilities too. Here, a Person class gains a ...
3. Extensions in Kotlin Extensions can make our code easier to read and maintain by adding functionality to existing classes. For example, to add a new function to String, we can write an extension like: fun String.toTitleCase(): String = this.split(" ").joinToString(" ") { it.capital...
and can check for this == null inside the body. This is what allows you to call toString() in Kotlin without checking for null: the check happens inside the extension function.
We can extend this fun to String: fun String.toSentenceCase(): String { return this.toUpperCase() + this.substring(1) } 1. 2. 3. Then in the whole package, we able to use that function: val greeting = "welcome" println(greeting.toSentenceCase()) 1. 2....
Kotlin扩展(Extension)特性允许为现有的类添加新的函数和属性,而无需继承该类或使用装饰器模式。可以在不修改原始类的情况下,为它添加新的行为。 在实际编程当中是非常有用的功能,具体场景如:我们想修改JDK中的String,想在它的基础上增加一个方法"lastElement() "来获取末尾元素,如果使用Java,我们是无法通过常规手...
instead of really calling to a function. It will simplify some situations. For instance, if we have a function as an argument, a regular function will internally create an object that contains that function. On the other hand, inline functions will substitute the code of the function in the...
I`m using lots of extension functions in my project, but after one of the latest updates they are no longer suggested by autocompletition, I need to write function name myself and only after that I can import it.Votes 0 分享 3 条评论 排序方式 Anton Mefodichev 创建于 2024年10月7...
Kotlin extension functions that complement Google's ktx library. Features Coroutine Context Helpers Switch between coroutine contexts easily: Before: withContext(Dispatchers.IO) { databaseQueryFunction() } .let{ withContext(Dispatchers.Main) { liveData.value=it } } ...
Now convert to a single expression extension function:// begin-insert: tags/functions-to-extension-methods.15:src/main/java/travelator/marketing/HighValueCustomersReport.kt#summaryFor [source,kotlin] --- private fun List<CustomerData>.summarised(): String = ...
网络扩展功能 网络释义 1. 扩展功能 Kotlin 与 Java的比较 - Java ... ... 混合类型和一流代理( Mixins and First-class delegation)扩展功能(Extension Function) ... simpleframework.net|基于2个网页 释义: 全部,扩展功能