CODEWITHSUNDEEP
regextcl
Nathan Pk
Nathan Pk

Reputation: 749

Need guidance in dealing with TCL regexp

I need to process a random string which has the character ".." in-between. Like the one shown below

a..b/c..de/f-g..xyz..abc..def..123..

How can I get the data between these ".." using regexp?( this string can be of any length and I need to get each intermediate data set for further processing). Please guide me with this.

Thanks!

Upvotes: 2

Views: 169

Answers (3)

Donal Fellows
Donal Fellows

Reputation: 137787

One tool to consider for this sort of thing, especially if the splitting term is more complex than the one in the question, is the textutil::split package in Tcllib. That lets you split strings by regular expression, like this:

package require textutil::split

set sample "a..b/c..de/f-g..xyz..abc..def..123.."
set RE {\.\.};  # “.” is an RE metacharacter, and so needs to be escaped
set pieces [textutil::split::splitx $sample $RE]

The above will also produce an empty element at the end of the pieces list, because there's a terminating separator.

Upvotes: 1

Nick
Nick

Reputation: 4362

You could use this regex:

[^..]

That would match all characters that are not ...

Upvotes: 0

rene
rene

Reputation: 76

If there is p.e. no newline in the string you could get a list of your strings with:

set in a..b/c..de/f-g..xyz..abc..def..123..
set out [split [string map {.. \n} $in] \n]]

Upvotes: 6

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