This FAQ is a collection of answers to some of the common Personal Computer questions which tend to pop-up from time to time. The answers get easily forgotten when not in daily use, and sometimes they are hard to find in a multitude of books and manuals each treating it's subjects in a different way, and often discussing details, while defaulting on the basics (presuming, I guess, that they are obvious — well, they are, but only after you know them). However, when you need the answer, it might be a burning issue, and a desperate search under pressure can be quite stressful and frustrating.
This selection is an attempt to avoid that frustration by trying to put the important data together into one FAQ hyperlinked for the ease of use, and accessible from anywhere and by anybody who might have interest in it. However, this selection is not compiled for the Web only — rather it's my working reference, which I try to maintain as accurate and current as possible. As such it inevitably will always lack an overall integrity and completeness, yet it is still a rather useful tool that often saves time.
Most of the questions originated from a real-life experience of a PC programmer. The answers were looked for in every available source ranging from formal manuals to news group discussions, and conducting an exhaustive experiments when nothing else would help. Every answer was checked to the best of my competence, and as a rule was tested by a substantial time of repeated usage. This is not to suggest that it is in any way guaranteed to be error-free — you will be using any advice you pick from this FAQ entirely at your own risk, and will be completely responsible yourself for any problems that might arise from this usage. So when trying an advice, please exercise the common sense precautions, and test it most thoroughly yourself before applying it to anything serious.
This legal mantra been chanted, I want to mention that all error reports and any comments about this FAQ are most welcome, and I'll try to do my best to fix any known problem as quick as I'll be able to do this.
Enter command DOSKEY /REINSTALL that will clear command history;
enter command DOSKEY /HISTORY to verify that command history is clean.
Expression S.length evaluates to the size (length) of the string S, i.e. to the number of string symbols (JavaScript strings have their symbols numbered in the range from 0 through S.length-1).