How is this split method working?

[Raj Singh]

length = 20
text = ' This forum is connected to a mailing list that is read by
thousands of people.'


text.split[0..length]

I looked at the split api but can't understand how the above code is
working.

 

[7stud --]

length = 20
text = ' This forum is connected to a mailing list that is read by
thousands of people.'


text.split[0..length]

I looked at the split api but can't understand how the above code is
working.

split() returns an array, and:

arr = [10, 20, 30, 40]
p arr

slice = arr[0..2]
p slice

--output:--
[10, 20, 30, 40]
[10, 20, 30]

 

[dare ruby]

length = 20
text = ' This forum is connected to a mailing list that is read by
thousands of people.'


text.split[0..length]

I looked at the split api but can't understand how the above code is
working.

Its not specific how you want to split your string but may be

split_text = split('')

will split the string of characters like,

T
h
i
s

f
o
......


so samething like

split_text = split(' ')

withh split the string into an array of strings like

This
forum
is
connected
to
a
mailing
list
.....


so if you give your specifications clearly we are ready to help you Raj
singh..


--- Jose Martin

 

[Peña, Botp]

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[dare ruby]

From: Raj Singh [mailto:[email protected]]
# length = 20
# text = ' This forum is connected to a mailing list that is read by
# thousands of people.'
# text.split[0..length]
# I looked at the split api but can't understand how the above code is
# working.

Hi Raj,

u didn't show what you wanted.

so (i guess , maybe you want string#[] or string#slice instead,

length=20
#=> 20

text = ' This forum is connected to a mailing list that is read by
thousands of people'
#=> " This forum is connected to a mailing list that is read by
thousands of people"

text[0,length]
#=> " This forum is conne"

text[0..length-1]
#=> " This forum is conne"

text[length..-1]
#=> "cted to a mailing list that is read by thousands of people"

kind regards -botp

yes i agree with your comments.

raj you did not specified what you need clearly but hope the above would
help you a lot in your work.

this is the thing you expected?

ready to do it for you but need specifications clearly.

-- jose martin

 

[Raj Singh]

if you look at the comments of this blog
http://daniel.collectiveidea.com/blog/2007/7/10/a-prettier-truncate-helper
you will find following code.


def truncate_words(text, length = 10, separator = ' ', truncate_string =
'...')
' ' if text.nil?

truncated_text = text.split[0..length].join(separator)

if(truncated_text == text)
text
else
truncated_text + ' ' + truncate_string
end
end


I had never seen text.split[0..length] before. What's happening here. I
always saw split being passed an argument but never an array.

 

[Peña, Botp]

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[7stud --]

I had never seen text.split[0..length] before. What's happening here. I
always saw split being passed an argument but never an array.

The code you originally posted:

result = text.split[0..length]

is equivalent to:

arr = text.split
result = arr[0..length]