CODEWITHSUNDEEP
javascriptnode.jsarraysperformancetime
Jamie
Jamie

Reputation: 2081

User input possibilities of pairs to match to arrays

I am trying to find the most efficient way, in javascript(I'm using node.js), of taking a user's input and pairing the inputs to find exact array matches. I know how to do this without performance in mind, my main goal is the best performance algorithm.

For example: User input(can have up to 15 animals): dog bear cat lion snake

The api data(in json), where the animal array length is always 2:

{
  data: [
   { animals: ["cat", "dog"], content: "demo content 1." },
   { animals: ["snake", "cat"], content: "demo content 2." },
   { animals: ["bird", "mouse"], content: "demo content 3." }
  ]
}

I want to find all the animal matches, in this case, the user input would match to dog cat cat snake animals. I would be able to access "demo content 1." and "demo content 2.".

Upvotes: 1

Views: 89

Answers (1)

Nick
Nick

Reputation: 147206

One fairly efficient method would be to use Array.reduce on the data array, checking that each value in data.animals is in the user input and if so, pushing the content to the output:

const apidata = {
  data: [
   { animals: ["cat", "dog"], content: "demo content 1." },
   { animals: ["snake", "cat"], content: "demo content 2." },
   { animals: ["bird", "mouse"], content: "demo content 3." }
  ]
}

const userinput = ['dog', 'bear', 'cat', 'lion', 'snake']

const content = apidata.data.reduce((c, o) => {
  if (o.animals.every(a => userinput.includes(a)))
    c.push(o.content);
  return c;
}, []);

console.log(content)

Upvotes: 2

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