CODEWITHSUNDEEP
ruby
grabury
grabury

Reputation: 5559

How to extract a number within a range from a string

I am trying to look for and return a score between 0 and 10 in a string. message examples

"Toni gets 9"
"8 for Sam"
"10 is a reasonable score for Jed"

This is what I've tried:

message.split.find do |score|
 (0..10).include? score.to_i
end

Upvotes: 1

Views: 105

Answers (7)

Mike Campbell
Mike Campbell

Reputation: 7978

It's as simple as message[/\b([0-9]|10)\b/]

Upvotes: 0

user2975403
user2975403

Reputation: 41

You can do this: 

message.split(' ')[1].scan(/\d/)

Or this: 

message.gsub(/[^0-9]/, '')

Or you can use a loop:

message.each_char{ |c| if c.ord<11 or c.ord>0 }

Upvotes: 0

Alok Anand
Alok Anand

Reputation: 3356

Try this:--

messages = ["Toni gets 9",
"8 for Sam",
"10 is a reasonable score for Jed",]

irb> messages.collect{|msg| msg.split.find{|str| str.match /\b^(10|[0-9])\b/}}
 => ["9", "8", "10"]

Upvotes: 0

Sabuj Hassan
Sabuj Hassan

Reputation: 39365

You can try this one:

input = [ "0 Toni", "Toni gets 9", "8 for Sam", "10 is", "11 is" ]
input.each do |sentence|
  if(sentence =~ /\b([0-9]|10)\b/)
    puts sentence
  end
end

I have used word boundary(\b) around the regex so that it doesn't match any digits sticked with the text.

Upvotes: 0

toro2k
toro2k

Reputation: 19228

I'd do like this:

regexp = /\b(?:10|[0-9])\b/

'Toni gets 9'[regexp]
# => "9"

'8 for Sam'[regexp]
# => "8"

'10 is a reasonable score for Jed'[regexp]
# => "10"

'11 is my score'[regexp]
# => nil

'01 is your score'[regexp]
# => nil

'1000 is no score'[regexp]
# => nil

Upvotes: 2

Amit Kumar Gupta
Amit Kumar Gupta

Reputation: 18567

message.split.find { |string| (0..10).include?(string =~ /\A\d+\z/) }

Upvotes: 1

Emu
Emu

Reputation: 5905

a = ["8 out of gem", "ruby got 10", "ali receives 13 marks"]

a.each do |i|
  if ((i =~ /\d/) > -1 && (i =~ /\d/) < 11)
    puts i
  end

end

Output:

8 out of gem
ruby got 10

Upvotes: 0

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