Question

How to get the index of an element in array that matching a condition with JavaScript

Answer 1

const arr = ['typescript', 'javascript', 'nodejs', 'javascript'];
 
const condition = (element) => element == 'javascript';
 
console.log(condition);
console.log(arr.findIndex(condition)); 
console.log(arr[arr.findIndex(condition)]);  
 
 
   
   
/*
run:
   
(element) => element == 'javascript'
1
"javascript"
   
*/

 

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