String#sub all instances of pattern?

Ruby
1

eg: str = “a b c d”
newStr = str.sub(" ", ", ")

gives me output a, b c d

what i want is a, b, c, d

ow do i make this happen sub isnt doing it for me i guess. I been
looking all through the ruby-doc to no avail.

2

Hi –

On Mon, 29 Sep 2008, Nick Bo wrote:

eg: str = “a b c d”
newStr = str.sub(" ", ", ")

gives me output a, b c d

what i want is a, b, c, d

ow do i make this happen sub isnt doing it for me i guess. I been
looking all through the ruby-doc to no avail.

Check out String#gsub, and also Array#join.

David

3

try gsub instead of sub.

Jamey

4

perfect thanks

5

On Sep 28, 2008, at 9:04 PM, Nick Bo wrote:

eg: str = “a b c d”
newStr = str.sub(" ", ", ")

gives me output a, b c d

what i want is a, b, c, d

ow do i make this happen sub isnt doing it for me i guess. I been
looking all through the ruby-doc to no avail.

You want to use str.gsub rather than str.sub. Compare the
documentation of the two:

------------------------------------------------------------ String#gsub
str.gsub(pattern, replacement) => new_str
str.gsub(pattern) {|match| block } => new_str

  From Ruby 1.9.0

  Returns a copy of _str_ with _all_ occurrences of _pattern_
  replaced with either _replacement_ or the value of the block. The
  _pattern_ will typically be a +Regexp+; if it is a +String+ then

no
regular expression metacharacters will be interpreted (that is
+/\d/+ will match a digit, but +‘\d’+ will match a backslash
followed by a ‘d’).

[…]

------------------------------------------------------------- String#sub
str.sub(pattern, replacement) => new_str
str.sub(pattern) {|match| block } => new_str

  From Ruby 1.9.0

  Returns a copy of _str_ with the _first_ occurrence of _pattern_
  replaced with either _replacement_ or the value of the block. The
  _pattern_ will typically be a +Regexp+; if it is a +String+ then

no
regular expression metacharacters will be interpreted (that is
+/\d/+ will match a digit, but +‘\d’+ will match a backslash
followed by a ‘d’).

[…]

Hope this helps,

Mike

–

Mike S. [email protected]
http://www.stok.ca/~mike/

The “`Stok’ disclaimers” apply.

6

Nick Bo wrote:

eg: str = “a b c d”
newStr = str.sub(" ", ", ")

gives me output a, b c d

what i want is a, b, c, d

ow do i make this happen sub isnt doing it for me i guess. I been
looking all through the ruby-doc to no avail.

gsub