WISH: FastqDataFile and BamDataFile report on read lengths

[HenrikBengtsson]

It would be convenient if the FastqDataFile and/or BamDataFile classes could report on read length. The question is, are all reads always of the same lengths? If not, then one needs to report on the first (few) reads.

[HenrikBengtsson]

So, FastqDataFile already does this, e.g.

> fq
FastqDataFile:
Name: reads_2
Tags:
Full name: reads_2
Pathname: fastqData/TopHat-example/LambdaPhage/reads_2.fq
File size: 17.29 kB (17703 bytes)
RAM: 0.00 MB
Is paired: FALSE
Number of sequences: 100
Common width of sequences: 75

However, one need to make sure to "force" parsing of the file first (e.g. using nbrOfSeqs(fq)), otherwise all values are NA.