// [["it's","Sunny","in"],[""],["California"]] arr1.flatMap(x=>x.split(" ")); // ["it's","Sunny","in", "", "California"] 注意,输出列表长度可以不同于输入列表长度。 在一个 map() 期间增加或去除一些项 flatMap 能用于在 map 期间增删项目(也就是修改 items 的数量)。换句...
根据我们之前所说的 promise : Observable<T''> ,所以 T : Observable<T''> 和T'' : html。 If you put that promise producing function in map , you get Observable<Observable<T''>> when what you want is Observable<T''> : you want the observable to emit the html 价值观。 flatMap 之所...
代码语言:javascript 代码运行次数:0 运行 AI代码解释 publicabstractclassRichFlatMapFunction<IN,OUT>extendsAbstractRichFunctionimplementsFlatMapFunction<IN,OUT> 它既实现了FlatMapFunction接口类,又继承了AbstractRichFunction。其中AbstractRichFunction是一个抽象类,有一个成员变量RuntimeContext,有open、close和getRunti...
JavaScript Copy Output What is the flatMap() method in JavaScript? The flatMap() method in JavaScript combines the capabilities of the map() and flat() methods. Each element of an array can have a mapping function applied to it, and the mapped values are then flattened into a single new...
代码语言:javascript 代码运行次数:0 运行 AI代码解释 defgetWords(lines:Seq[String]):Seq[String]=linesflatMap(line=>line split" ")val e=Seq("I love","coding scala")getWords(e).foreach(println(_)) 最后打印输出了 函数说明 getWords(e)先将e中的两个元素:”I love”,”coding scala”,变成...
Array.prototype.flatMap() in JavaScript. Mixins in JavaScript Object.assign() in JavaScript? How to Convert JavaScript Class to JSON in JavaScript? Explain hoisting in JavaScript Parameters & Arguments in JavaScript. Kickstart YourCareer Get certified by completing the course ...
[duplicate].flatMap将在提供的数组的每个元素上调用回调函数，然后thenflatten结果。如果在回调函数中返回...
Now, when I fill in the information and click send, it will g...How to do inheritance with JavaScript object literals? Hello I have a problem with how to do inheritance while declaring object prototypes with object literal syntax. I have made two Fiddles to help you help me. Fiddle1, ...
我们可以重写MapFunction或RichMapFunction来自定义map函数,RichMapFunction的定义为:RichMapFunction[IN, OUT],其内部有一个map虚函数,我们需要对这个虚函数重写。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 val dataStream:DataStream[Int]=senv.fromElements(1,2,-3,0,5,-9,8)// 继承RichMapFunction...
Learn how to use the JavaScript Array flatMap method to create a new array with flattened elements. Understand its syntax and practical examples.