Question

How to immediately invoke arrow functions in JavaScript

Answer 1

const s = 'JavaScript';
const revers_string = (() => {
    const arr = [...s];
    arr.reverse();
    console.log(arr.join(''));
    return arr.join('');
    
})();

console.log(revers_string);


    
/*
run:
  
tpircSavaJ
tpircSavaJ

*/

 

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