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difference between find and filter javascript

tinydev answered on August 1, 2021 Popularity 10/10 Helpfulness 4/10

answer difference between find and filter javascript

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difference between find and filter javascript

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//find method returns the first element in an array which meets
//															a condition
let numbers = [-1,-2,-4,-6,0,1,2,3,4,5];
const greaterThanZero = (val) => val > 0;
numbers.find(greaterThanZero); 
//Expected output 
//1

//filter returns an array of elements that meet a condition
numbers.filter(greaterThanZero);
//Exected output
//[1,2,3,4,5]

Popularity 10/10 Helpfulness 4/10 Language javascript

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Tags: between difference filter find javascript

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Contributed on Aug 01 2021

tinydev

0 Answers Avg Quality 2/10

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both usually work: the format is identical
find gets the first value that matches your criteria
filter gets all the values in the array that matches your criteria

Example

  let dates = ["2022-10-17", "2022-10-18"];

  for(var i in dates)
   { customDatesStyles.push({
        startDate: moment(dates[i])
      });

    }
function change(da)
 { console.log(customDatesStyles[0].startDate);
  console.log(da);
let d = customDatesStyles.find((el)=> el.startDate.format("YYYY-MM-DD") == da.format("YYYY-MM-DD")));

 }
both filter and find would have been fine.
The answer with filter would just have needed to be d[0] (although there is only one in this case).
But filter can have more than one case, whereas find stops at the first found case.

Popularity 9/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: filter fi

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Contributed on Oct 15 2022

Javasper

0 Answers Avg Quality 2/10

difference between find and filter javascript

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