How to generate a random string, and specify the length you want, or better generate unique string on specification you want

Question

There is a library to generate Random numbers, so why isn\'t there a library for generation of random strings?

In other words how to generate a random string, and sp

Answer 1

A library for generating random strings wouldn't be very useful. It would either be too simple, so that you often need to replace it anyway, or too complex in order to be able to cover any possible situation, that you replace it because it's to complicated to use.

Creating random strings is quite easy by using the random geneator for numbers, given the exact details of your needs. It's just more efficient to write the code specifically for each situation.

If you want a unique string, there is two possibilities. You can either keep every random string that is created, so that you can check for uniqueness, or you can make it really long so that it's incredibly unlikely that there would be duplicates. A GUID does the latter (which explains why it's so long), so there is already an implementation for that.