ES6 introduces rest parameters. Rest parameters allow us to send an arbitrary number of parameters to a function in the form of an array. Rest parameter can only be the last one in the list of parameters, and there can only be one rest parameter. Putting a rest operator(...) before the last formal parameter indicates that parameter is a rest parameter. The following example shows adding a rest operator before the last formal parameter:
function sayThings(tone, ...quotes){
console.log(Array.isArray(quotes)); //true
console.log(`In ${tone} voice, I say ${quotes}`)
}
sayThings("Morgan Freeman","Something serious","
Imploding Universe"," Amen");
//In Morgan Freeman voice, I say Something serious,
Imploding Universe,Amen
The first parameter passed to the function is received in tone, while the rest of the parameters are received as an array. Variable arguments (var-args) have been part of several...