Was this supposed to be a command line tool used in a Linux environment, where grep, sed, etc. are already available? Doesn't excuse their behavior, not at all, but I can see exactly how that might provoke their derision. The mistake was quite worse than I thought. But it is foolish to be provoked by the foolishness or ignorance of others. They could have remained silent, or could have reached out constructively (e.g. by introducing them to those widely distributed set of really powerful command line tools).

Or is there some JavaScript additional functionality that I'm missing?