CODEWITHSUNDEEP
javascriptregex
Siddharth Srivastva
Siddharth Srivastva

Reputation: 965

Javascript Regex Invalid Group

Re-writing the question since named capturing groups are not the main issue.

I have the following regex now:

/([a-zA-Z ]*)([0-9]*)/g

The code is working now fine but var m = /([a-zA-Z ]*)([0-9]*)/g.exec('Ashok : 9830011245') is only giving me the Ashok as the result.

m[0]: "Ashok"
m[1]: "Ashok"
m[2]: ""

Sample Strings I need to work it on: 

var strings = [
"Ashok : 9812340245",
"Amit Singh :\nChakmir 9013123427\n\nHitendra Singh:\n\nM. : 9612348943",
"ANIL  AGARWAL :  \n09331234728\n09812340442\nMAYANK AGARWAL : \n09123416042",
"JAGDISH SINGH :      098123452187 \n09830111234",
"MD QYAMUDDIN : 09433186333,\n09477215123\nMD TAJUDDIN : \n09831429111\nGYASUDDIN ANSARI :\n08961383686 \nMD BABUDDIN : \n09433336456 \n09903568555\nJAWE",
"Viay Singh : 9330938789,\nBijay Singh : 9330938222",
"Nilu :          09830161000,\n09331863222,\n09830071333,\nSantosh Upadhayay :       09831379555,\n09331727858,\n09830593322"
];

Please guide.

Upvotes: 1

Views: 172

Answers (1)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 626690

It seems you may extract all the substrings you need with 

/^([^:0-9\n]+)\s*(?::\s*)?([0-9]*)/gm

See the regex demo.

Details

  • ^ - start of the line (as m enables the multiline mode)
  • ([^:0-9\n]+) - 1 or more chars other than :, digits and newline
  • \s* - 1 or more whitespaces
  • (?::\s*)? - an optional sequence of : and 0+ whitespaces
  • ([0-9]*) - zero or more digits.

JS demo:

var strings = [
"Ashok : 9812340245",
"Amit Singh :\nChakmir 9013123427\n\nHitendra Singh:\n\nM. : 9612348943",
"ANIL  AGARWAL :  \n09331234728\n09812340442\nMAYANK AGARWAL : \n09123416042",
"JAGDISH SINGH :      098123452187 \n09830111234",
"MD QYAMUDDIN : 09433186333,\n09477215123\nMD TAJUDDIN : \n09831429111\nGYASUDDIN ANSARI :\n08961383686 \nMD BABUDDIN : \n09433336456 \n09903568555\nJAWE",
"Viay Singh : 9330938789,\nBijay Singh : 9330938222",
"Nilu :          09830161000,\n09331863222,\n09830071333,\nSantosh Upadhayay :       09831379555,\n09331727858,\n09830593322"
];

var regex = /^([^:0-9\n]+)\s*(?::\s*)?([0-9]*)/gm;
for (var s of strings) {
  console.log("Looking in: ", s, "\n--------------------------");
	console.log(s.match(regex));
}
// To output groups:
console.log("====Outputting groups====");
for (var s of strings) {
	while(m=regex.exec(s))
    console.log(m[1].trim(), ";", m[2]);
}

Upvotes: 1

Related Questions