While the '!' addition to methods is an useful convention, having both collect, and collect! methods, and for example only a delete method for arrays (which doe

While the '!' addition to methods is an useful convention, having both collect, and collect! methods, and for example only a delete method for arrays (which does change the array it is called on), and similar inconsistencies in libraries, can occasionally lead to unnecessary API-lookups/bugs. (I have been using Ruby (in a FOSS/academic setting) for a couple of years now (and I know Python too, though still prefer Ruby over it))