Reg Ex exclusion

ruby-talk
1

Hi all,

I thought this would be easy, but I am clearly mixing up my logic. I
have a string like so

string = "joe|blogg|clothing|"

I want to remove the last pipe with a reg ex and I am trying to use the
following code to do so:

string(/\|$/, 1)

This however is not doing anything except delete the entire string, any
suggestion are greatly appreciated.

Many thanks

···

--
Posted via http://www.ruby-forum.com/.

2

Use sub or sub! "joe|blogg|clothing|".sub(/\|$/,'')

···

On Wed, Sep 2, 2009 at 11:17 AM, Ne Scripter < stuart.clarke@northumbria.ac.uk> wrote:

Hi all,

I thought this would be easy, but I am clearly mixing up my logic. I
have a string like so

string = "joe|blogg|clothing|"

I want to remove the last pipe with a reg ex and I am trying to use the
following code to do so:

string(/\|$/, 1)

This however is not doing anything except delete the entire string, any
suggestion are greatly appreciated.

Many thanks
--
Posted via http://www.ruby-forum.com/\.

3

Are you actually getting results from "string(/\|$/,1)"? I get what I
would expect:
irb(main):001:0> st="joe|blogg|clothing|"
=> "joe|blogg|clothing|"
irb(main):004:0> st(/(.*)\|$/)
#<Class:0x3f99248>: undefined method `st' for main:Object

I think you mean

Try this:

string[/(.*)\|$/,1]

irb(main):010:0> st[/(.*)\|$/,1]
=> "joe|blogg|clothing"

By the way, if you're doing this to split up that string into joe,
blogg and clothing later, you can just skip the Regex and use split:

irb(main):011:0> st.split("|")
=> ["joe", "blogg", "clothing"]

-Dylan

···

On Sep 2, 9:17 am, Ne Scripter <stuart.cla...@northumbria.ac.uk> wrote:

Hi all,

I thought this would be easy, but I am clearly mixing up my logic. I
have a string like so

string = "joe|blogg|clothing|"

I want to remove the last pipe with a reg ex and I am trying to use the
following code to do so:

string(/\|$/, 1)

This however is not doing anything except delete the entire string, any
suggestion are greatly appreciated.

Many thanks
--
Posted viahttp://www.ruby-forum.com/.

4

string = "joe|blogg|clothing|"

=> "joe|blogg|clothing|"

string.chop

=> "joe|blogg|clothing"

string[/(.*)\|$/,1]

=> "joe|blogg|clothing"

string.split("|").join("|")

=> "joe|blogg|clothing"

The regex solution submitted before is good, though if all of your
cases are this straight forward, I think string.chop is hard to beat.
-tim

5

Josh Cheek wrote:

Use sub or sub! "joe|blogg|clothing|".sub(/\|$/,'')

On Wed, Sep 2, 2009 at 11:17 AM, Ne Scripter <

thanks

···

--
Posted via http://www.ruby-forum.com/\.

6

Thanks all for your help. I went for the regular expression in the end
for consistency with other code.

Thanks a lot

Tlb Fpx wrote:

···

Josh Cheek wrote:

Use sub or sub! "joe|blogg|clothing|".sub(/\|$/,'')

On Wed, Sep 2, 2009 at 11:17 AM, Ne Scripter <

thanks

--
Posted via http://www.ruby-forum.com/\.