# Ask for some experience

**URL:** <https://www.ruby-forum.com/t/ask-for-some-experience/47966>\
**Category:** Ruby\
**Created:** [November 15, 2005, 2:57pm UTC](https://www.ruby-forum.com/t/ask-for-some-experience/47966 "2005-11-15T14:57:53Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![joe-black](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/87869e/32.png) [@joe-black](https://www.ruby-forum.com/u/joe-black)\
**Post date:** [November 15, 2005, 2:57pm UTC](https://www.ruby-forum.com/t/ask-for-some-experience/47966/1 "2005-11-15T14:57:53Z")

</div>

hello everyone.  
any one like to share some experience about ruby string  
just like java: trim(), split(), or indexOf()

all regards

---

<div class="post-metadata">

**Author:** ![joe-black](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/87869e/32.png) [@joe-black](https://www.ruby-forum.com/u/joe-black)\
**Post date:** [November 15, 2005, 3:03pm UTC](https://www.ruby-forum.com/t/ask-for-some-experience/47966/2 "2005-11-15T15:03:36Z")

</div>

joe-black wrote:

> hello everyone.  
> any one like to share some experience about ruby string  
> just like java: trim(), split(), or indexOf()

Java split() =\> Ruby String.split:

“hello world”.split( " ")

returns [“hello”, “world”].

Java trim() =\> Ruby String.strip:

" hello world ".strip

returns “hello world”.

Java indexOf() =\> Ruby String.index

“hello world”.index( “w”)

returns 6.

---

<div class="post-metadata">

**Author:** ![joe-black](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/87869e/32.png) [@joe-black](https://www.ruby-forum.com/u/joe-black)\
**Post date:** [November 15, 2005, 5:09pm UTC](https://www.ruby-forum.com/t/ask-for-some-experience/47966/3 "2005-11-15T17:09:14Z")

</div>

that’s cool.  
any more? the frequently used.

---

<div class="post-metadata">

**Author:** ![joe-black](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/87869e/32.png) [@joe-black](https://www.ruby-forum.com/u/joe-black)\
**Post date:** [November 15, 2005, 5:48pm UTC](https://www.ruby-forum.com/t/ask-for-some-experience/47966/4 "2005-11-15T17:48:23Z")

</div>

On Wed, Nov 16, 2005 at 01:09:17AM +0900, Joe B. wrote:

> that’s cool.  
> any more? the frequently used.

irb(main):001:0\> “foo”.upcase  
=\> “FOO”  
irb(main):002:0\> “foo”.sub(/[aeiou]/, ‘a’)  
=\> “fao”  
irb(main):003:0\> “foo”.gsub(/[aeiou]/, ‘a’)  
=\> “faa”  
irb(main):004:0\> “FOO”.downcase  
=\> “foo”  
irb(main):005:0\> “foo”.capitalize  
=\> “Foo”  
irb(main):006:0\> “foo”.tr(“aeiou”, “QWRTY”)  
=\> “fTT”  
irb(main):007:0\> “foo”.rjust(10)  
=\> " foo"  
irb(main):008:0\> String.help

The last one only works if you have ihelp installed. If not, install it  
or do

“foo”.methods.sort

---

<div class="post-metadata">

**Author:** ![joe-black](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/87869e/32.png) [@joe-black](https://www.ruby-forum.com/u/joe-black)\
**Post date:** [November 16, 2005, 10:08am UTC](https://www.ruby-forum.com/t/ask-for-some-experience/47966/5 "2005-11-16T10:08:01Z")

</div>

On 15/11/05, Joe B. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> hello everyone.  
> any one like to share some experience about ruby string  
> just like java: trim(), split(), or indexOf()
> 
> all regards

Reading the pickaxe and  
$ ri String  
would be a good idea.

One neat thing I onlz found a few month ago is this  
irb(main):001:0\> “my string with 28 characters”[/\d+/]  
=\> “28”  
irb(main):002:0\> s = “my string with 28 characters”  
=\> “my string with 28 characters”  
irb(main):003:0\> bschroed@black:~/svn$ irb1.8  
irb(main):001:0\> s = “my string with 28 characters”  
=\> “my string with 28 characters”  
irb(main):002:0\> s[/\d+/]  
=\> “28”  
irb(main):003:0\> s[/\d+/] = “twentyeight”  
=\> “twentyeight”  
irb(main):004:0\> s  
=\> “my string with twentyeight characters”  
irb(main):005:0\> s[/string (\w+) (\w+)/]  
=\> “string with twentyeight”  
irb(main):006:0\> s[/string (\w+) (\w+)/, 1]  
=\> “with”  
irb(main):007:0\> s[/string (\w+) (\w+)/, 2]  
=\> “twentyeight”

Especially line three is really cool.

cheers,

Brian

–  
[http://ruby.brian-schroeder.de/](http://ruby.brian-schroeder.de/)

Stringed instrument chords: [http://chordlist.brian-schroeder.de/](http://chordlist.brian-schroeder.de/)