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difference between kotlin also, apply, let, use, takeIf and takeUnless in Kotlin

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问题 I read many Kotlin documents about these items. But I can't understand so clearly. What is the use of Kotlin let , also , takeIf and takeUnless in detail? I need an example of each item. Please don't post the Kotlin documentation. I need a real-time example and use cases of these items. 回答1: let public inline fun <T, R> T.let(block: (T) -> R): R = block(this) Take the receiver and pass it to a function passed as a parameter. Return the result of the function. val myVar = "hello!" myVar.let {

Accessing Kotlin extension functions from Java

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Is it possible to access extension functions from Java code? I defined the extension function in a Kotlin file. package com.test.extensions import com.test.model.MyModel /** * */ public fun MyModel.bar(): Int { return this.name.length() } Where MyModel is a (generated) java class. Now, I wanted to access it in my normal java code: MyModel model = new MyModel(); model.bar(); However, that doesn't work. The IDE won't recognize the bar() method and compilation fails. What does work is using with a static function from kotlin: public fun bar(): Int { return 2*2 } by using import com.test

Accessing Kotlin extension functions from Java

阅读更多关于 Accessing Kotlin extension functions from Java

问题 Is it possible to access extension functions from Java code? I defined the extension function in a Kotlin file. package com.test.extensions import com.test.model.MyModel /** * */ public fun MyModel.bar(): Int { return this.name.length() } Where MyModel is a (generated) java class. Now, I wanted to access it in my normal java code: MyModel model = new MyModel(); model.bar(); However, that doesn\'t work. The IDE won\'t recognize the bar() method and compilation fails. What does work is using