javascript regex question

Question

i want to check for certain regex expression to make sure some string is followed by '::' and some number. The number can be between 1 and 999999999999.

for example: 'ACME LOCK & KEY::42443' should pass where 'ABC Inc.' should fail.

any help?

Gumbo · Accepted Answer · 2010-09-13 21:18:53Z

4

Try this:

/::[1-9]\d{0,11}$/.test(str)

This will return true for every string that ends with :: followed by an integer between 1 and 999999999999 inclusive.

answered Sep 13, 2010 at 21:18

Gumbo

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3 Comments

Kung Fu Ninja Over a year ago

will try. will this work too? $(this).val().match(/(.*[::][0123456789])/g). UPDATE: Gumbo, that works. thanks

Kung Fu Ninja Over a year ago

it's returning the string and the number of digits.

CaffGeek Over a year ago

Just a note, that this doesn't currently ensure a string exists prior to the ::, so ::123 will pass.

CaffGeek · Accepted Answer · 2010-09-13 21:23:52Z

2

Here, this will match a string that ends in :: followed by 1-12 digits.

/^.+::[1-9]\d{0,11}$/.test(stringToTest)

This also checks to make sure there is a string of at least 1 character prior to the ::

Tests:

FAIL: asdf
PASS: asdf::123
FAIL: asdf::
FAIL: asdf::0
PASS: asdf::999999999999
FAIL: asdf::9999999999999
FAIL: ::asdf
FAIL: ::999

answered Sep 13, 2010 at 21:23

CaffGeek

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