regex - IJ in a Regular Expression - What does it mean? -

regex - IJ in a Regular Expression - What does it mean? -

the new version of type expansion software upgraded has included regular expressions. trying understand them little improve looking break downwards 2 they've included help avoid double capitalization @ origin of word.

the first

\b[:upper:][:upper:][:lower:]+

i take mean there word break before entry begins , first 2 letters have capital , 1 or more lowercase letters.

the sec

\b(ij|cc)[:lower:]+

which take mean if word begins capital "i" , capital "j" or 2 consecutive capital "c" plus 1 or more lowercase letter allow them exceptions.

i sense missing here. can advise these expressions mean?

"ij" means character sequence, "i" followed "j" - nil special - , conclusion behavior (if not reasoning) correct.

the look \b(ij|cc)[:lower:]+2 simply restrictive subset of \b[:upper:][:upper:][:lower:]+1, restricts input starting "ij" or "cc".

class="lang-none prettyprint-override">string matches ------ ------- foo (none) ij (none) no mach on [:lower:]+ ijfoo 1, 2 matches ij, matches [:upper:][:upper:] ccfoo 1, 2 xxfoo 1 matches [:upper:][:upper:], not ij|cc

regex