How to replace "\" from string

ruby-talk
1

Hi all,

I have string something like
String path = "C:\Gaurang\ruby\demo.xls"

would someone let me know how to replace "\" with "\\"

I tried something like below

path.gsub("\\", "\\\\")

but it's not working..

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2

This is a topic which comes up over and over again. I am sure you'll
find it in the history of this forum.

Kind regards

robert

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3

path = "C:\Gaurang\ruby\demo.xls"

is not valid! you NEED
path = "C:\\Gaurang\\ruby\\demo.xls"
or
path = 'C:\Gaurang\ruby\demo.xls'

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4

I believe you need to add delimiters, it should look like
Path.gsub(/"\\", "\\\\"/)

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5

no nick,s. your code is very wrong:
1. var is named wrong
2. gsub wants in this form 2 Strings not one Regex
3. it does not work because there is no "\\" inside path

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6

ya
what work is
path.gsub("\\","\\\\")
but this also not work BECAUSE your main string path has no "\\" inside
so gsub does not replace something and you can not replace the \ inside
path = "C:\Gaurang\ruby\demo.xls"

because its interpreted as \G \r and \d

if you does not want to write
path = "C:\\Gaurang\\ruby\\demo.xls"

you chould write inside ' ' (the char above #)
path = 'C:\Gaurang\ruby\demo.xls'

you can do nothing with "C:\Gaurang\ruby\demo.xls"

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7

Are you _assigning_ the return value of the above call to another object
(or back to path)?

HINT: gsub doesn't alter the String but instead _returns_ one with the
altered value: but gsub! (not the !) alters the existing string.

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On Fri, Jul 22, 2011 at 12:05:54AM +0900, Gaurang Shah wrote:

Hi all,

I have string something like
String path = "C:\Gaurang\ruby\demo.xls"

would someone let me know how to replace "\" with "\\"

I tried something like below

path.gsub("\\", "\\\\")

--
Darryl L. Pierce <mcpierce@gmail.com>
http://mcpierce.multiply.com/
"What do you care what people think, Mr. Feynman?"

8

At this point, print the string and you will see easily what the problem is.

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On Thu, Jul 21, 2011 at 10:05 AM, Gaurang Shah <shahgomji@gmail.com> wrote:

Hi all,

I have string something like
String path = "C:\Gaurang\ruby\demo.xls"

9

Hans Mackowiak wrote in post #1012179:

no nick,s. your code is very wrong:
1. var is named wrong
2. gsub wants in this form 2 Strings not one Regex
3. it does not work because there is no "\\" inside path

I have used "\\" instead of "\" coz "\" is a escape character.

I can't write something line path.gsub("\","\\")

it would be compile time error.

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10

No, you don't. It's two separate arguments.

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On Fri, Jul 22, 2011 at 12:23:26AM +0900, nick s. wrote:

I believe you need to add delimiters, it should look like
Path.gsub(/"\\", "\\\\"/)

--
Darryl L. Pierce <mcpierce@gmail.com>
http://mcpierce.multiply.com/
"What do you care what people think, Mr. Feynman?"