Re: delete columns csv file

Ed Morton wrote:

> No, if your input data looks like a number, it'll be considered to be a
> number. Note that that only applies to input data so if "75" appears in
> your input, it's a number, but if you explicitly use "75" in your code,
> it's a string, and if "bob" appears in your input, that's also a string.

Thanks. What put me on the wrong track was the fact that if you do "print
a"
and a is uninitialized, it prints nothing since it considers a to have the
value "" (you have to use a+0 to print 0), hence my "strings by default"
thought. But of course, this has almost nothing to do with what happens
during comparisons.
Thanks

-- 
All the commands are tested with bash and GNU tools, so they may use
nonstandard features. I try to mention when something is nonstandard (if
I'm aware of that), but I may miss something. Corrections are welcome.