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map and flatmap

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Chache17 answered on August 10, 2023 Popularity 7/10 Helpfulness 1/10

answer map and flatmap

related map and flatMap:

map and flatmap

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//We have the following array:
let arr1 = ["it's Sunny in", "", "London"];

//Map creates multidimensional array:
arr1.map(item => item.split(" "));
//returns
(3) [Array(3), Array(1), Array(1)]
  0: (3) ["it's", "Sunny", "in"]
  1: [""]
  2: ["London"]
// visually: [["it's", "Sunny", "in"], [""], ["London"]]

//While flatmap makes an array flattened to dimension 1 (“unidimensional” so to say):
arr1.flatMap(item => item.split(" "));
//returns
(5) ["it's", "Sunny", "in", "", "London"]
  0: "it's"
  1: "Sunny"
  2: "in"
  3: ""
  4: "London"
//visually: ["it's", "Sunny", "in", "", "London"]

Popularity 7/10 Helpfulness 1/10 Language javascript

Source: www.linkedin.com

Tags: flatmap javascript map

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Contributed on Aug 10 2023

Chache17

0 Answers Avg Quality 2/10

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map and flatMap:

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val maybeNumber: Option[Int] = Some(42)

val doubled: Option[Int] = maybeNumber.map(n => n * 2)
println(doubled) // Output: Some(84)

Popularity 6/10 Helpfulness 1/10 Language typescript

Source: chat.openai.com

Tags: map typescript

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Contributed on Sep 01 2023

Sumit Rawal

0 Answers Avg Quality 2/10

map and flatmap

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