// [["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...
如果我们面对的是嵌套数组,那么flatMap()同样能轻松应对: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 letnestedArray=[[1],[2,3],[4]];letflattenedArray=nestedArray.flatMap(x=>x);console.log(flattenedArray);// 输出: [1, 2, 3, 4] 在这个例子中,flatMap()将每个子数组直接返回并“压...
flatMap是函数式编程中的一个操作符,用于将一个嵌套的数据结构展平为一个扁平的数据结构。在JavaScript中,flatMap通常用于数组的操作。 具体来说,flatMap函数会对数组中的每个元素应用一个映射函数,并将结果展平为一个新的数组。与之相比,map函数只会对每个元素应用映射函数,但不会展平结果。 flatMap的应用场景包...
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...
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 ...
find_all elements in an array that match a condition? I've an array of hash entries, and want to filter based on a paramater passed into the function. If there are three values in the hash, A, B, and C, I want to do something similar to: find all where A... ...
[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...
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...
JavaScript built-in: Iterator: flatMap Global usage 75.86% + 0% = 75.86% IE ❌ 6 - 10: Not supported ❌ 11: Not supported Edge ❌ 12 - 116: Not supported ✅ 117 - 118: Supported ❌ 119 - 121: Not supported ✅ 122 - 135: Supported ✅ 136: Supported Firefox ❌ 2 ...
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