Working with strings...

[Tom Rathbone]

Hi,

Is there a function that would work over the characters in String in
the way that each works for an array? I want to process the string
character by character and thought that #each would do this,
apparently not. Even better would be a collect style method.
Something like this.

"some string".collect do |x|
x + '|'
end

#collect_char or #each_char would be great.

Perhaps not the best example there, basically i intend to interpret a
string of character commands from a string i.e. something like
Brainf**k.

Thanks,

Tom.

 

[Szymon Drejewicz]

Try this:

result = ''
"some string".each_byte { |b| result << b << '|' }
puts result

 

[Sea&Gull]

Hi,

Is there a function that would work over the characters in String in
the way that each works for an array? I want to process the string
character by character and thought that #each would do this,
apparently not. Even better would be a collect style method.
Something like this.

"some string".collect do |x|
x + '|'
end




#collect_char or #each_char would be great.

"some string".split('').collect {|i| print i, '|'}

 

[Florian Gross]

Is there a function that would work over the characters in String in
the way that each works for an array? I want to process the string
character by character and thought that #each would do this,
apparently not. Even better would be a collect style method.
Something like this.

"some string".collect do |x|
x + '|'
end

Generally you can do "some string".scan(/./).map { |x| x + "|" }

But note that will construct an intermediate array which is a little
inefficient -- if you have really big strings (a few hundred kilobyte)
you're probably better off doing it like this instead:

result = ""; "some string".scan(/./) { |x| result << x << "|" }; result

 

[Szymon Drejewicz]

Or:

string.gsub!(/./) { |match| match += '|' }

 

[Wybo Dekker]

Or:

string.gsub!(/./) { |match| match += '|' }

or:

string.gsub!(/./,'\&|')

 

[Szymon Drejewicz]

string.gsub!(/./,'\&|')


cool but it could be even shorter:

string.gsub! //,'\0|'

))

(one leading '|' in output more)

 

[Douglas Livingstone]

(one leading '|' in output more)

Better to rename the var >

s.gsub!(/./,'\&|')

 

[Hugh Sasse Staff Elec Eng]

string.gsub! //,'\0|'

))

(one leading '|' in output more)

string.gsub! //,'|'


Hugh

 

[YANAGAWA Kazuhisa]

In Message-Id: <[email protected]>

"some string".collect do |x|
x + '|'
end

require "enumerator"

p "some string".enum_foreach_byte).inject("") {|s, c| s << c.chr << "|"}
#=> "s|o|m|e| |s|t|r|i|n|g|"

 

[Daniel Berger]

Hi,

Is there a function that would work over the characters in String in
the way that each works for an array? I want to process the string
character by character and thought that #each would do this,
apparently not. Even better would be a collect style method.
Something like this.

"some string".collect do |x|
x + '|'
end


#collect_char or #each_char would be great.

Perhaps not the best example there, basically i intend to interpret a
string of character commands from a string i.e. something like
Brainf**k.

Thanks,

Tom.

s = "some string"

s.split('').join('|') + '|'
# or
s.unpack("A"*s.length).join('|') + '|'

Regards,

Dan