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comp.lang.ruby

String#include? with several possibilities?

aldric[removeme]

2/20/2009 6:25:00 PM

Say I have a string like.. At random...
string = "The quick brown fox jumps over the lazy dog"
I'd like to do something like:
puts "Yes!" if string.include? ('quick', 'brown', 'lazy')
Expected behavior : if -any- of them are included, return true.

Is that possible with a built-in method?

Thanks,
--Aldric
5 Answers

lasitha

2/20/2009 6:51:00 PM

0

On Fri, Feb 20, 2009 at 11:54 PM, Aldric Giacomoni
<"aldric[remove]"@trevoke.net> wrote:
> Say I have a string like.. At random...
> string = "The quick brown fox jumps over the lazy dog"
> I'd like to do something like:
> puts "Yes!" if string.include? ('quick', 'brown', 'lazy')
> Expected behavior : if -any- of them are included, return true.
>
> Is that possible with a built-in method?

$: irb
01> s = "The quick brown fox jumps over the lazy dog"
--> "The quick brown fox jumps over the lazy dog"
02> s =~ /(quick|brown|fox)/
--> 4
03> s =~ /(not|this|nor|that)/
--> nil

Cheers,
lasitha.

Robert Klemme

2/20/2009 7:21:00 PM

0

On 20.02.2009 19:25, Aldric Giacomoni wrote:
> Say I have a string like.. At random...
> string = "The quick brown fox jumps over the lazy dog"
> I'd like to do something like:
> puts "Yes!" if string.include? ('quick', 'brown', 'lazy')
> Expected behavior : if -any- of them are included, return true.
>
> Is that possible with a built-in method?

Yes, of course!

puts "Yes!" if %w[quick brown lazy].any? {|s| string.include? s}

Kind regards

robert

aldric[removeme]

2/20/2009 7:34:00 PM

0

lasitha wrote:
> On Fri, Feb 20, 2009 at 11:54 PM, Aldric Giacomoni
> <"aldric[remove]"@trevoke.net> wrote:
>
>> Say I have a string like.. At random...
>> string = "The quick brown fox jumps over the lazy dog"
>> I'd like to do something like:
>> puts "Yes!" if string.include? ('quick', 'brown', 'lazy')
>> Expected behavior : if -any- of them are included, return true.
>>
>> Is that possible with a built-in method?
>>
>
> $: irb
> 01> s = "The quick brown fox jumps over the lazy dog"
> --> "The quick brown fox jumps over the lazy dog"
> 02> s =~ /(quick|brown|fox)/
> --> 4
> 03> s =~ /(not|this|nor|that)/
> --> nil
>
> Cheers,
> lasitha.
>
>
Oh.. Duh! Must learn to thing with regexp. Thank you! What does the
number mean?

--Aldric

Gary Wright

2/20/2009 7:35:00 PM

0


On Feb 20, 2009, at 1:51 PM, lasitha wrote:

> On Fri, Feb 20, 2009 at 11:54 PM, Aldric Giacomoni
> <"aldric[remove]"@trevoke.net> wrote:
>> Say I have a string like.. At random...
>> string = "The quick brown fox jumps over the lazy dog"
>> I'd like to do something like:
>> puts "Yes!" if string.include? ('quick', 'brown', 'lazy')
>> Expected behavior : if -any- of them are included, return true.
>>
>> Is that possible with a built-in method?

pattern = Regexp.union(*%w{quick brown lazy})
string = "The quick brown fox jumps over the lazy dog"

puts "Yes!" if string =~ pattern

lasitha

2/20/2009 8:24:00 PM

0

On Sat, Feb 21, 2009 at 1:04 AM, Aldric Giacomoni
> lasitha wrote:
>> $: irb
>> 01> s = "The quick brown fox jumps over the lazy dog"
>> --> "The quick brown fox jumps over the lazy dog"
>> 02> s =~ /(quick|brown|fox)/
>> --> 4
>> 03> s =~ /(not|this|nor|that)/
>> --> nil
>
> Oh.. Duh! Must learn to thing with regexp. Thank you! What does the number
> mean?

It was a mindshift for me too, no doubt.

If i give you a couple more samples i'm sure you'll figure out what
the number stands for :)

$: irb
01> s = "The quick brown fox jumps over the lazy dog"
--> "The quick brown fox jumps over the lazy dog"
02> s =~ /quick|brown|fox/
--> 4
03> s =~ /brown|fox/
--> 10
04> s =~ /fox/
--> 16

By the way, the parentheses surrounding the union in my previous post
were superfluous.

Cheers,
lasitha.