Reg :regular expression

Rails
1

Hi,

Iam facing problem in excluding new line in reular expression…(/n)
eg: shiva.grp\nhi da so it should exclude \n .if any one knows help me

2

You’ll have to make the regexp multline with the /m option (i.e. /foo/
m) or it won’t match across newlines.

Rein

On Sep 3, 12:36 pm, Jamal S. [email protected]

3

Rein H. wrote:

You’ll have to make the regexp multline with the /m option (i.e. /foo/
m) or it won’t match across newlines.

Rein

On Sep 3, 12:36 pm, Jamal S. [email protected]

Thanks for your reply
this is my regular expression
my source is this

mygroup.grp
hi how r u
iam fine

str=~/^([a-zA-Z]{1}[a-zA-Z0-9]{0,}.([a-zA-Z]{1,}))\s(.*)$/m

if i put this regular expression it is not matching

4

I need to understand, you don’t want anything after new line?

or you want to remove \n and use your regular expression?

5

Shiva K. wrote:

Hi,

Iam facing problem in excluding new line in reular expression…(/n)
eg: shiva.grp\nhi da so it should exclude \n .if any one knows help me

Exclude you don’t want it?

[^\n]

something like that or ?

6

Jamal S. wrote:

I need to understand, you don’t want anything after new line?

or you want to remove \n and use your regular expression?

its like this

eg: shiva.grp hi how r u
eg: shiva.grp
hi how r u

both this format should accept

7

Hi Shivan,
I tried with this regex, it worked for both the example you mentioned.

reg = /^[a-zA-Z]+.[a-zA-Z]+[a-zA-Z ]+[\s]*$/

str = two example values you specified.

str =~ reg -----> 0(output)

On Sep 4, 1:18 pm, Shiva K. [email protected]

8

Matthew R. wrote:

raghukumar wrote:

Hi Shivan,
I tried with this regex, it worked for both the example you mentioned.

reg = /^[a-zA-Z]+.[a-zA-Z]+[a-zA-Z ]+[\s]*$/

str = two example values you specified.

str =~ reg -----> 0(output)

On Sep 4, 1:18 pm, Shiva K. [email protected]

irb(main):001:0> regexp = /^([a-zA-Z]\w*.([a-zA-Z]+))\s(.)$/m
=> /^([a-zA-Z]\w.([a-zA-Z]+))\s(.*)$/m
irb(main):002:0> “mygroup.grp\nhi how r u\niam fine” =~ regexp
=> 0
irb(main):003:0> $1
=> “mygroup.grp”
irb(main):004:0> $2
=> “grp”
irb(main):005:0> $3
=> “hi how r u\niam fine”

thnaks man for your help

(str=~/^([a-zA-Z]{1}[a-zA-Z0-9]{0,}.([a-zA-Z]{1,}))$/i)

in the above expression it should not allow new line but it allowing
inside

pls help me…iam poor in regular expression

9

raghukumar wrote:

Hi Shivan,
I tried with this regex, it worked for both the example you mentioned.

reg = /^[a-zA-Z]+.[a-zA-Z]+[a-zA-Z ]+[\s]*$/

str = two example values you specified.

str =~ reg -----> 0(output)

On Sep 4, 1:18 pm, Shiva K. [email protected]

irb(main):001:0> regexp = /^([a-zA-Z]\w*.([a-zA-Z]+))\s(.)$/m
=> /^([a-zA-Z]\w.([a-zA-Z]+))\s(.*)$/m
irb(main):002:0> “mygroup.grp\nhi how r u\niam fine” =~ regexp
=> 0
irb(main):003:0> $1
=> “mygroup.grp”
irb(main):004:0> $2
=> “grp”
irb(main):005:0> $3
=> “hi how r u\niam fine”