Question

I’m trying to implement a number range using the gsub function between 1-200, but I couldn’t find any good examples. I’m implementing a bbcode system where a user should be able to enter something like

1. [size=80]Hello world[/size] => Valid
2. [size=200]Hello world[/size] => Valid
3. [size=201]Hello world[/size] => Invalid

This is currently what I have being fed into the gsub method and it accepts anything between 1-999:

\[size=(\d{1,3})\](.+?)\[\/size\]

Answer 1

try with this: /\[size=(?:200|1\d{2}|[1-9]\d?)\](.+?)\[\/size\]/

my testing program:

if '[size=80]Hello world[/size]' =~ /\[size=(?:200|1\d{2}|[1-9]\d?)\](.+?)\[\/size\]/ 
    puts 'valid'
else    
    puts 'invalid'
end        

if '[size=200]Hello world[/size]' =~ /\[size=(?:200|1\d{2}|[1-9]\d?)\](.+?)\[\/size\]/     
    puts 'valid'
else    
    puts 'invalid'
end          

if '[size=201]Hello world[/size]' =~ /\[size=(?:200|1\d{2}|[1-9]\d?)\](.+?)\[\/size\]/     
    puts 'valid'
else    
    puts 'invalid'
end                  

output:

valid
valid
invalid