process.argv is undefined in node.js

Question

I can't seem to be running the most trivial of scripts in node:

Platform: windows 10

node -v: v10.7.0

file: "sample.js"

process.argv.forEach((val, index) => {
    console.log(`${index}: ${val}`);
  });

command line:

D:\temp>node sample.js 1 2 3
D:\temp\sample.js:4
process.argv.forEach((val, index) => {
             ^

TypeError: Cannot read property 'forEach' of undefined
    at Object.<anonymous> (D:\temp\sample.js:4:14)
    at Module._compile (internal/modules/cjs/loader.js:689:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
    at Module.load (internal/modules/cjs/loader.js:599:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
    at Function.Module._load (internal/modules/cjs/loader.js:530:3)
    at Function.Module.runMain (internal/modules/cjs/loader.js:742:12)
    at startup (internal/bootstrap/node.js:266:19)
    at bootstrapNodeJSCore (internal/bootstrap/node.js:596:3)

Answer 1

Solution

I figured out, that I defined the function process below, that's why process object was overridden by my own.

So, to resolve:

1. Check that you are not overriding "process" object with a function

2. Put it initialization higher line by line and find what code is overriding it

Old suggestion:

In my case, it was "redefined" even if I put it on the first line. "Process" was a function.

To retrieve Object I used explicit call:

const process = require('process');