how to insert a carriage return in a string

[Emmanuel Touzery]

Hello,

definitely a very newbie question... i have strings, possibly with
carriage returns in my application, and i want to save them with '\n' in
litteral in my file (so that i'm guaranteed this string is on at most one
line), and then get back "\n" when deserializing.

But i don't quite get it for the deserialization part:

irb(main):001:0> myString = 'a\nb'
"a\\nb"
irb(main):002:0> myString.gsub('\n', "\n")
"a\\nb"
irb(main):003:0> myString.gsub("\\n", "\n")
"a\\nb"

obviously i want to get "a\nb" (from "a\\nb"). How I am supposed to do that?

thank you,

emmanuel

 

[Edwin Pratomo]

irb(main):003:0> myString.gsub("\\n", "\n")
"a\\nb"

obviously i want to get "a\nb" (from "a\\nb"). How I am supposed to do
that?

myString.gsub(/\\n/, "\n")

rgds,
Edwin.

 

[Bermejo, Rodrigo]

You should use doublequotes to build your strings
Check the differences btw " & '



irb.log(main):001:0> f=File.open "tmp" ,"w"
irb.log(main):002:0> myString = 'a\nb'
"a\\nb"
irb.log(main):003:0> f << myString
irb.log(main):005:0> f.close
irb.log(main):007:0> r=`cat tmp` #Or File.open
"a\\nb"


irb.log(main):011:0> myString = "a\nb"
"a\nb"
irb.log(main):012:0> f=File.open "tmp" ,"w"
irb.log(main):013:0> f << myString
irb.log(main):014:0> f.close
irb.log(main):016:0> r=`cat tmp` #Or File.open
"a\nb"

then you can >>>
r.split("\n").each {| line | p line }


-ronnie.

Hello,

definitely a very newbie question... i have strings, possibly with
carriage returns in my application, and i want to save them with '\n' in
litteral in my file (so that i'm guaranteed this string is on at most one
line), and then get back "\n" when deserializing.

But i don't quite get it for the deserialization part:

irb(main):001:0> myString = 'a\nb'
"a\\nb"
irb(main):002:0> myString.gsub('\n', "\n")
"a\\nb"
irb(main):003:0> myString.gsub("\\n", "\n")
"a\\nb"

obviously i want to get "a\nb" (from "a\\nb"). How I am supposed to do that?

thank you,

emmanuel

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General Electric - CIAT
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Information Technologies.
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