rest operator issue (occured in learnyounode, but seems not related)

[jpsollie]

• Version: 14.2.0
• Platform: Linux portablejp 5.6.14 test: extend timeout for failure on cluster worker init test #10 SMP Sun May 24 09:52:23 CEST 2020 x86_64 Intel(R) Core(TM) i5-7600 CPU @ 3.50GHz GenuineIntel GNU/Linux
• Subsystem:

What steps will reproduce the bug?

in learyounode, excersise 2, working with rest operator:

let begin = 0;  
let {,,...numbersl} = process.argv;  
for(let i in numbersl) {
          begin += Number(i);
          };  
console.log(begin);

gives an error "numbersl is not iterable".

when digging into the code:

let begin = 0;  
let {ax,bx,...numbersl} = process.argv;  
/*for(let i of numbersl) {  
       begin = (begin + Number(i));  
}*/
console.log(numbersl);

the answer is:

node baby-steps.js 1 2 3
{
 '0': '/usr/bin/node',
 '1': '/tmp/baby-steps.js',
 '2': '1',
 '3': '2',
 '4': '3'
}

...whereas you would expect the 0 and 1 to be removed from numbersl

How often does it reproduce? Is there a required condition?

tried several times, occurs every time

What is the expected behavior?

argument 0 and 1 are removed from numbersl

What do you see instead?

arguments are still included

Additional information

[jpsollie]

sorry, the error is mine:
let {ax,bx,...numbersl} = process.argv;
had to be:
let [ax,bx,...numbersl] = process.argv;
because argv is an array, not an object. My bad