Another opinion on the readability of this bit of code: wouldn't this be the same as:

```coffeescript
generatorsAvailable = '--harmony' in process.execArgv or 
  '--harmony-generaors' in process.execArgv
# Or...
generatorsAvailable = process.execArgv.some (arg) -> 
  arg in ['--harmony', '--harmony-generators']
```

?

I find both of them more straightforward to read. But, i usually prefer single assignment variables if possible, so it probably is a very biased opinion =P