string - Comma Separated Integer between 1-9999 Regex -

i'm struggling come regex list of integers separated comma , ranging between 1-9999.

this have far:

"(^[1-9][0-9]{3}|[1-9][0-9]{2}|[1-9][0-9]|[1-9](,[1-9][0-9]{3}|[1-9][0-9]{2}|[1-9][0-9]|[1-9])*)$" 

i don't want allow spaces , should't end in comma, should allow:

1,2,9999 1 43,5 

an integer netween 1 , 9999 can matched

(?:[1-9]|[1-9][0-9]{1,3}) 

that synonymic

[1-9][0-9]{0,3} 

details:

• [1-9] - digit 1-9 range
• | - or
• [1-9][0-9]{1,3} - integer 10 till 9999.

or

• [1-9] - digit 1-9 range
• [0-9]{0,3} - 0 3 digits

so, list of integers separated comma can witten as:

\a(?:[1-9]|[1-9][0-9]{1,3})(?:,(?:[1-9]|[1-9][0-9]{1,3}))*\z 

or shorter version

\a[1-9][0-9]{0,3}(?:,[1-9][0-9]{0,3})*\z 

here regex demo

explanation:

• \a - unambiguous start of string
• [1-9][0-9]{0,3} - integer regex block
• (?: - beginning of non-capturing group match 0 or more sequences of:
  • , - comma
  • [1-9][0-9]{0,3} - 1 till 9999 integer regex block
• )* - end of non-capturing group
• \z - unambiguous very end of string.

in swift or objective c string pattern, need double backslashes,

swift:

var pattern = "\\a[1-9][0-9]{0,3}(?:,[1-9][0-9]{0,3})*\\z" 

objective c:

nsstring * pattern = @"\\a[1-9][0-9]{0,3}(?:,[1-9][0-9]{0,3})*\\z"; 

since need validate strings, need use unambiguous anchors \a , \z. note $ matches string if ends lf symbol, thus, advisable use end of string anchor \z.

edit:

to prove below not believe objective-c pattern above not work, here demo:

nsstring * teststr = @"1,4,566"; nsstring * pattern = @"\\a[1-9][0-9]{0,3}(?:,[1-9][0-9]{0,3})*\\z"; nspredicate * tst = [nspredicate predicatewithformat:@"self matches %@", pattern]; if ([tst evaluatewithobject:teststr]) {    nslog (@"yes"); } else {    nslog (@"no"); } 

result: yes