Hi I’m triying to substitute any ocurrences of ’ in a string by ’
Here’s a bit of testing I made in irb which wtf’s me:
irb(main):002:0> st = “un ’ monton ’ de ’ apostrofes '”
=> “un ’ monton ’ de ’ apostrofes '”
irb(main):003:0> sst = st.gsub(/’/,"’")
=> “un ’ monton ’ de ’ apostrofes '”
ok substitute ’ by ’ 
I don’t know why interpeter interpret ’ as
’ when in a double-quoted string contex but I’m a newbie so sure I’m
wrong
irb(main):004:0> sst = st.gsub(/’/,"\’")
=> “un monton ’ de ’ apostrofes ’ monton de ’ apostrofes ’ de
apostrofes ’ apostrofes "
irb(main):005:0> sst = st.gsub(/’/,”\’")
=> "un monton ’ de ’ apostrofes ’ monton de ’ apostrofes ’ de
apostrofes ’ apostrofes "
This seems to be substitute ’ by “rest of string from ocurrence”
regardless of scape chars
Totally dazzed and desperate I tried with another backslash… who
cares … and get this
irb(main):006:0> sst = st.gsub(/’/,"\\’")
=> “un \’ monton \’ de \’ apostrofes \’”
How do I get “un ’ monton ’ de ’ apostrofes '” from “un ’ monton ’
de ’ apostrofes '”? using regex?
Thanks
Hi,
On Apr 30, 12:22 pm, [email protected] wrote:
How do I get “un ’ monton ’ de ’ apostrofes '” from “un ’ monton ’
de ’ apostrofes '”? using regex?
Like this:
st = “un ’ monton ’ de ’ apostrofes '”
=> “un ’ monton ’ de ’ apostrofes '”
st.gsub(/’/, “\\’”)
=> “un \’ monton \’ de \’ apostrofes \’”
It just displays with \ in there because it needs to escape the
itself when displaying it. Any manipulations you need to do on the
actual string object will only see a single ‘’ character rather than
a double.
s = “’”
=> “’”
s.gsub!(/’/, “\\’”)
=> “\’”
s.length
=> 2
s[0].chr
=> “\”
s[1].chr
=> “’”
Jon
[email protected] wrote:
irb(main):003:0> sst = st.gsub(/'/,“'”)
You can really confuse the heck out of yourself this way. There are two
problems:
(1) Backslashes must be escaped in a double-quoted string.
(2) gsub has special behavior unlike anything else in Ruby: backslashes
are unescaped in the second parameter, regardless of the quoting.
So, if you want one backslash to be substituted, and if you insist on
double-quoting, you have to type four backslashes:
irb(main):003:0> puts “hello”.gsub(“e”,“\\”)
h\llo
For the workaround, check this recent thread:
<http://groups.google.com/group/comp.lang.ruby/browse_thread/thread/d8f4
74e7f2959585/9cadabc099a27925?lnk=st&q=#9cadabc099a27925>
m.
I don’t know why interpeter interpret ’ as