Truncate a string to first 200 characters

ruby-talk
1

hi,

i've been searching high and low for a method that will help me do this for
a couple of days, but decided eventually just to post here in the hope
someone can point out the probably blatantly obvious for me :slight_smile:

i'm looking for something that can take a string and truncate it to a
certain amount of characters. then i can add '...' at the end.

i used to use substr() when working with php

$str = substr( $str, 0, 200) . "...";

many thanks
luke

2

luke wrote:

hi,

i've been searching high and low for a method that will help me do this for
a couple of days, but decided eventually just to post here in the hope
someone can point out the probably blatantly obvious for me :slight_smile:

i'm looking for something that can take a string and truncate it to a
certain amount of characters. then i can add '...' at the end.

s = 'abcdefghijklmnopqrstuvwxyz'
puts s[0, 6] << '...'

#-> abcdef...

daz

3

luke wrote:

i'm looking for something that can take a string and truncate it to a
certain amount of characters. then i can add '...' at the end.

i used to use substr() when working with php

$str = substr( $str, 0, 200) . "...";

The most correct way of doing this IMHO is this:

  str += "..." if str.slice!(200 .. -1)

which will cut away everything after the first 200 characters and append a marker if the string was truncated.

Your PHP solution would map to this:

  str = str[0, 200] + "..."

4

Hi,

At Sat, 9 Jul 2005 12:25:50 +0900,
daz wrote in [ruby-talk:147632]:

s = 'abcdefghijklmnopqrstuvwxyz'
puts s[0, 6] << '...'

#-> abcdef...

If you consider multi-byte environments, you should strip
trailing garbage bytes.

  puts s[0, 6][/\A.*/m] << '...'

路路路

--
Nobu Nakada

5

aaaah. i see. is this another case of 'everything is an object'? i need to
wrap my head around the all pervasiveness of what that means in the future.
thanks all.

"Florian Gro脽" <florgro@gmail.com> wrote in message
news:danghf$l0b$1@sea.gmane.org...

路路路

luke wrote:

> i'm looking for something that can take a string and truncate it to a
> certain amount of characters. then i can add '...' at the end.
>
> i used to use substr() when working with php
>
> $str = substr( $str, 0, 200) . "...";

The most correct way of doing this IMHO is this:

str += "..." if str.slice!(200 .. -1)

which will cut away everything after the first 200 characters and append
a marker if the string was truncated.

Your PHP solution would map to this:

str = str[0, 200] + "..."

6

luke wrote:

aaaah. i see. is this another case of 'everything is an object'? i need to
wrap my head around the all pervasiveness of what that means in the future.
thanks all.

"blah".class #=> String

From the command line:
ri String#
ri String#concat
ri String#slice!

Generally,
ri String

Devin

路路路

The most correct way of doing this IMHO is this:

str += "..." if str.slice!(200 .. -1)

which will cut away everything after the first 200 characters and append
a marker if the string was truncated.

Your PHP solution would map to this:

str = str[0, 200] + "..."