javascript regex for 2 possible values

Question

I'm having trouble coming up with a regex to accept two possible values.

I would like to accept a % or a number and unit.

For example. Any percentage between 0% and 100% are acceptable. OR Any integer followed by a suffix. (10 AB, 78JB, 244 AB). Only possible suffixes are (AB, JB, RB, LB, IB)

Value must be one or the other (2% OR 10 AB);

I can do these individually with regex but don't know how to combine into one.

\d+\s?(AB|JB|RB|LB|IB)?
\d+\s?\%

ah....duh....i was trying to share the digits part...but that approach works as well. Thx. — KingKongFrog
– KingKongFrog, Commented Feb 9, 2017 at 23:11
Are the suffixes to be matched as whole words? I.e. do you need to match 10 AB in 10 ABC? Try /\d+\s?(?:(?:AB|JB|RB|LB|IB)\b|%)/g — Wiktor Stribiżew
– Wiktor Stribiżew, Commented Feb 9, 2017 at 23:12
So simple \d+\s?(?:%|AB|JB|RB|LB|IB) combine and conquer.. — user557597
– user557597, Commented Feb 9, 2017 at 23:41

Wiktor Stribiżew · Accepted Answer · 2017-02-10 17:14:00Z

1

If you plan to "merge" the patterns so as to only repeat the \d+ part once, you may just include the % into the alternation group with letter suffxies:

/\d+\s?(?:AB|JB|RB|LB|IB|%)/g

(see the regex demo) unless you need to match the suffixes as whole words. In that case, you need to add a word boundary after the suffixes only, not after %:

/\d+\s?(?:(?:AB|JB|RB|LB|IB)\b|%)/g

See the regex demo

answered Feb 10, 2017 at 17:14

Wiktor Stribiżew

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Shawn Tabrizi · Accepted Answer · 2017-02-09 23:12:13Z

0

It seems like you can just add an OR statement between the two:

\d+\s?(AB|JB|RB|LB|IB)|\d+\s?\%

See it in action here. I removed a ? after the 'number unit'.

answered Feb 9, 2017 at 23:12

Shawn Tabrizi

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