https://blog.logrocket.com › understanding-flatmap-other-typescript-arrays
Understanding flatMap() and other TypeScript arraysThe flatMap() method is available on the Array object in TypeScript. It works similarly to the map() method but with one key difference. Not only does the flatMap() method map each element of an array to a new value, but it will also flatten that array and add its element to the resulting array.
https://stackoverflow.com › questions › 56544572
Flatten array of arrays in TypeScript - Stack OverflowYou can flatten the array with flat() let foo: string[][] = [["a", "b", "c"], ["a", "b", "c"], ["a", "b", "c"]]; let bar = foo.flat() log. console.log(bar) // a,b,c,a,b,c,a,b,c. UPDATE. By correcting the type to string [] you can also use concat.
The flatMap() method of Array instances returns a new array formed by applying a given callback function to each element of the array, and then flattening the result by one level. It is identical to a map() followed by a flat() of depth 1 (arr.map(...args).flat()), but slightly more efficient than calling those two methods separately.
https://bobbyhadz.com › blog › typescript-flatten-array-of-arrays
How to Flatten an Array of Arrays in TypeScript | bobbyhadzUse the flat() method to flatten an array in TypeScript. The flat method takes a parameter, which defaults to 1 and indicates how deep the nested array should be flattened. The method returns a new array with the sub-array elements concatenated into it.
https://www.peerigon.com › en › blog › flatmap-in-typescript-apps
Why flatMap() is easier than filter() in TypeScript appsTherefore, flatMap allows TypeScript to infer a more precise type for the resulting array. Since all elements that could potentially be undefined are replaced with empty arrays (and thus filtered out), the resulting array from flatMap is typed as string[], indicating that it only contains strings.
https://www.freecodecamp.org › news › flat-and-flatmap-javascript-array-methods
How to Use the flat () and flatMap () Methods to Flatten Arrays in ...You use the flat method to convert an original array into a new array. It does this by collecting and concatenating the sub-arrays in an array into a single array. An important note about this array method is that you can compute the original into another array based on the depth of the array.
La méthode flatMap() permet d'appliquer une fonction à chaque élément du tableau puis d'aplatir le résultat en un tableau. Cela correspond à l'enchaînement de Array.prototype.map() suivi de Array.prototype.flat() de profondeur 1.
https://medium.com › ... › demystifying-typescript-array-methods-map-vs-flatmap-eb6fd362081d
Demystifying TypeScript Array Methods: map vs flatMapThe `map` method allows you to transform each element of an array based on a provided function, creating a new array with the transformed results. #### Syntax: const newArray =...
https://blog.atomrc.dev › p › flatmap-a-better-filter-map
flatMap: an alternative to filter + map - Thomas BelinBut if we breakdown the type signature of a filter + map operation, we come to realize that there is an operator that is tailored for this: flatMap. I'm going to use the notation A[n] to specify the signature of an array of size n of elements of type A.
https://medium.com › @engmohammed633 › typescript-array-map-vs-flatmap-whats-the...
TypeScript Array map() vs flatMap(): What’s the Difference?The map() and flatMap() operations are part of the built-in Array type of TypeScript representing a collection of items. This tutorial discusses the syntax, simple examples, and noticeable ...
