Question

How to check if specific index exists in array with TypeScript

Answer 1

const array = ["typescript", "php", "ruby", "c++"];
 
const index = 4;
 
if (array[index] !== undefined) {
    console.log("index: " + index + " exists"); 
} else {
    console.log("index: " + index + " not exists"); 
}
   
    
    
/*
run:
          
"index: 4 not exists" 
        
*/

 

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