HowTo : sub.(regexp,$1)

[Bermejo, Rodrigo]

Dear Ruby List:

I'm trying to add one hr, to some time strings:

"1:12:00" --> "2:12:00" (i don't need to worry about 24)

Mi first try was ...

"1:12:00".gsub(/(^\d?\w)/,$1.to_i.succ.to_s)

Now I know that if I do this, at the time of the replacement $1 will be
empty.

could you illuminate myself with some ruby/intelligent way to achieve this ?


Thanks.

 

[Mark]

Dear Ruby List:

I'm trying to add one hr, to some time strings:

"1:12:00" --> "2:12:00" (i don't need to worry about 24)

One way is to use the block form of gsub

Mi first try was ...

"1:12:00".gsub(/(^\d?\w)/,$1.to_i.succ.to_s)

instead use

"1:12:00".gsub(/(^\d\w)/) {$1.to_i.succ.to_s)

which gives

"2:12:00"

HTH

Best Regards

Mark Sparshatt

 

[Mauricio Fernández]

Dear Ruby List:

I'm trying to add one hr, to some time strings:

"1:12:00" --> "2:12:00" (i don't need to worry about 24)

Mi first try was ...

"1:12:00".gsub(/(^\d?\w)/,$1.to_i.succ.to_s)

"1:12:00".gsub(/(^\d?\w)/) { $1.to_i.succ.to_s }


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[Robert Klemme]

"1:12:00".gsub(/(^\d?\w)/) { $1.to_i.succ.to_s }

I'd prefer a solution that works without a global variable:

"1:12:00".gsub(/^\d+/) {|m| m.to_i.succ}

Regards

robert