thousand ways to rome

[Chris Mueller]

Hi,
i am new to ruby and i am wondering how many more ways (and what ways)
there are to do this:

seperated_words = "hi, you, guys"
words_array = seperated_words.split(",")
for i in 0 ... words_array.length
words_array = words_array.strip
end

i suppose there's a one-liner that you write before you can think "ruby"
doesn't it ???

thx,

chris

 

[spooq]

"hi, you, guys".split(",").map! { |x| x.strip }

 

[Bruno Michel]

Chris Mueller a écrit :

Hi,
i am new to ruby and i am wondering how many more ways (and what ways)
there are to do this:

seperated_words = "hi, you, guys"
words_array = seperated_words.split(",")
for i in 0 ... words_array.length
words_array = words_array.strip
end

i suppose there's a one-liner that you write before you can think "ruby"
doesn't it ???

thx,

chris

Hi,

this is my version :

"hi, you, guys".split(',').map { |word| word.strip }
=> ["hi", "you", "guys"]

 

[Chris Mueller]

good timing to you first two guys

thx very much. got some new ruby cells working in my brain.

i tried same thing as ".map" with "array.each" before, but this does
only apply on a copy i suppose...

and of course the regexp way is ... groovy!

 

[spooq]

Your version has no side-effect on the array, so it's not exactly the
same as the original ...

Chris Mueller a =E9crit :

Hi,
i am new to ruby and i am wondering how many more ways (and what ways)
there are to do this:

seperated_words =3D "hi, you, guys"
words_array =3D seperated_words.split(",")
for i in 0 ... words_array.length
words_array =3D words_array.strip
end

i suppose there's a one-liner that you write before you can think "ruby= "
doesn't it ???

thx,

chris

Hi,

this is my version :

"hi, you, guys".split(',').map { |word| word.strip }
=3D> ["hi", "you", "guys"]

 

[spooq]

use map! instead

 

[spooq]

you are absolutely correct, my mind is rotting from weeks of sitting
at my desk twiddling my thumbs with no work to do.

use map! instead

nope,
try to understand the difference between split(regexp), map and map!
than decide for yourself
Look at this for example

"he, nice, guys".split(',').map!{|x| x.strip}
why would you use map! ?
try to put the above expression into a context
e.g.
x = ...

Hint: using map! on unreferenced objects is quite useless.

What about
x= "he, nice".split(",")
x.map!{|x|x.strip}

try
x.map!{|x|x.strip!}
would you like to use this?

If you want to walk do not learn to drive

Cheers
Robert

 

[Kero]

Hi,
i am new to ruby and i am wondering how many more ways (and what ways)
there are to do this:

seperated_words = "hi, you, guys"
words_array = seperated_words.split(",")
for i in 0 ... words_array.length
words_array = words_array.strip
end

i suppose there's a one-liner that you write before you can think "ruby"
doesn't it ???

Functionally slightly different, but:

words_array = separated_words.split(/, /)

 

[dblack]

Hi --

Hi,
i am new to ruby and i am wondering how many more ways (and what ways)
there are to do this:

seperated_words = "hi, you, guys"
words_array = seperated_words.split(",")
for i in 0 ... words_array.length
words_array = words_array.strip
end

Here's one way:

separated_words.scan(/[^\s,]+/)

And another:

require 'csv'
CSV.parse_line(separated.words.delete(' '))


David

--
David A. Black | (e-mail address removed)
Author of "Ruby for Rails" [1] | Ruby/Rails training & consultancy [3]
DABlog (DAB's Weblog) [2] | Co-director, Ruby Central, Inc. [4]
[1] http://www.manning.com/black | [3] http://www.rubypowerandlight.com
[2] http://dablog.rubypal.com | [4] http://www.rubycentral.org

 

[Robert Klemme]

Hi,
i am new to ruby and i am wondering how many more ways (and what
ways) there are to do this:

seperated_words = "hi, you, guys"
words_array = seperated_words.split(",")
for i in 0 ... words_array.length
words_array = words_array.strip
end

i suppose there's a one-liner that you write before you can think
"ruby" doesn't it ???

Functionally slightly different, but:

words_array = separated_words.split(/, /)

And yet another one

irb(main):002:0> "hi, you, guys".split /\s*,\s*/
=> ["hi", "you", "guys"]
irb(main):003:0> "hi, you, guys".scan /\w+/
=> ["hi", "you", "guys"]

Cheers

robert

 

[John Carter]

i suppose there's a one-liner that you write before you can think "ruby"
doesn't it ???

My favourite cheat is....

$ irb
irb(main):001:0> %w{hi you guys}
=> ["hi", "you", "guys"]
irb(main):002:0>



Not quite as much as a cheat as you think....

People keep creating small ugly special purpose once off data
languages like xml, csv, yaml,...

Unless there is a pressing need to store in language neutral format,
for pity sake don't.

Just store your data as plain old ruby.

Simpler and more expressive.

John Carter Phone : (64)(3) 358 6639
Tait Electronics Fax : (64)(3) 359 4632
PO Box 1645 Christchurch Email : (e-mail address removed)
New Zealand

 

[CParticle]

Hi,
i am new to ruby and i am wondering how many more ways (and what ways)
there are to do this:

seperated_words = "hi, you, guys"
words_array = seperated_words.split(",")
for i in 0 ... words_array.length
words_array = words_array.strip
end

i suppose there's a one-liner that you write before you can think "ruby"

Chris,
Assuming that the string convention stays a comma plus a single space
between words why not add the single space in to the split string and
write

seperated_words = "hi, you, guys"
word_array = seperated_words.split(", ")

CParticle

 

[Chris Mueller]

Assuming that the string convention stays a comma plus a single space
between words why not add the single space in to the split string and
write

i forgot to mention that the comma seperated list comes from a text_area
and may not include a whitespace after each ","

thank you all for your posts, i learned quite a lot about the many roads
to rome that ruby (and regex) provides

p.s: maybe i should start another competiton