flatMap()is similar tomap(), but the callback can return an array, and the end result will be flattened one-dimensional array instead of nested arrays. constscattered=["my favorite","hamburger","is a","chicken sandwich"];// regular map() results in nested arraysconsthuh=scattered.map(ch...
} Above two features are supported in latest Chrome and Node.js. flatMap: const duplicate = x =>[x, x]; console.log([2,3,4].flatMap(duplicate));//[2, 2, 3, 3, 4, 4] Object.fromEntries: Reverse opreation of Object.entries, it transform [['x', 42], ['y', 50]] too {x...
Above two features are supported in latest Chrome and Node.js. flatMap: const duplicate = x =>[x, x]; console.log([2,3,4].flatMap(duplicate));//[2, 2, 3, 3, 4, 4] 1. 2. Object.fromEntries: Reverse opreation of Object.entries, it transform [['x', 42], ['y', 50]] t...
const map = new Map(Object.entries({ a: 1, b: 2, c: 3 })); Object.values is natively supported in most modern browsers (but not IE, Opera Mini and iOS Safari) and Node.js 7.0+.Object.getOwnPropertyDescriptors()The Object.getOwnPropertyDescriptors() method returns another object ...
after ES6, use names of language features, such as"globalThis"and"Array.prototype.flatMap", the specification is only updated after working implementations exist in JS engines, checkTC39 Finished Proposalsfor a list of features to be included in the next specification ...
What is Blocking Deque in Java? BlockingDeque is a deque that is thread-safe. Multiple threads can work on the same data structure without any error or exception. But, a BlockingDeque has a lock on the data structure level. This means, whenever any operation is performed on BlockingDeque, a...
Table should be in 2NF Transitive functional dependency of non-prime attribute on any really key ought to be eliminated. An attribute that isn't important for any candidate key is known as non-prime attribute. As such 3NF can be made sense of this way: A table is in 3NF in the event...
flatmap 700 Junior Member Posted August 19, 2014 Musicophile said: Actually, A+ 2.0 will feature extended tags like conductor, ensemble, soloist etc. While I really really like the concept, I'm literally scared of eventually having to retag my entire library. I'm thinking of paying my ...
flatMap和map很像,不同之处是flatMap会对回调结果一维化: constscattered=["my favorite","fruit is","red bayberry"];scattered.map(chunk=>chunk.split(" "));// [["my", "favorite"], ["fruit", "is"], ["red", "bayberry"]]scattered.flatMap(chunk=>chunk.split(" "));// ["my", "...
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