Regex for replace the string on particular position

Question

MSH|^~\&|RAD|MCH|SOARCLIN|MCH|201309281506||ORU^R01|RMS|P|2.4 PID|0001|_MISSING_|059805^a~059805^a~059805^a||RENNER^KATHRYN^

In a string like the above I need to replace the string on basis of | (pipe sign) count.

e.g. :

MSH line want to replace after 3rth position of (|) pipe sign "MCH" with "ABC"

input : MSH|^~\&|RAD|MCH|SOARCLIN|MCH|201309281506||ORU^R01|RMS|P|2.4

output : MSH|^~\&|RAD|MCH|SOARCLIN|ABC|201309281506||ORU^R01|RMS|P|2.4

We disagree where the 3rd pipe sign is.

laune
– laune

2015-01-29 14:28:37 +00:00
Commented Jan 29, 2015 at 14:28 — laune
– laune, Commented Jan 29, 2015 at 14:28
that is example i given. position will be any number.

Parmar Kamlesh
– Parmar Kamlesh

2015-01-30 04:41:59 +00:00
Commented Jan 30, 2015 at 4:41 — Parmar Kamlesh
– Parmar Kamlesh, Commented Jan 30, 2015 at 4:41

laune · Accepted Answer · 2015-01-30 11:41:11Z

1

String repSection( String del, int count, String rep ){
    String[] toks = theString.split( Pattern.quote( del ) );
    toks[count] = rep;
    theString = String.join( del, toks );
}

Call:

String result = repSection( "|", 3, "ABC" );

It depends on counting alone; it doesn't matter what is there between the 3rd and 4th pipe char.

I prefer this to some fancy and difficult to maintain regex.

s = s.replaceAll( "^((?:[^|]*\\|){3})[^|]*", "$1|ABC" );

Again, this doesn't care what is between 3rd and 4th pipe symbol.

edited Jan 30, 2015 at 11:41

answered Jan 29, 2015 at 14:31

laune

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2 Comments

Parmar Kamlesh Over a year ago

hello @laune : is this possible to replace that pipe seperated content have also some inner seperated content. for example: PV1|027052^SCHROPP~GUY^M^1^2^MD|O|^1^2^MCH||||027052^SCHROPP~GUY^M^^^MD so now first occurrence of pipe and inside that content is 027052^SCHROPP~GUY^M^1^2^MD now first occurrence of ~ separated and content is this: GUY^M^1^2^MD inside that ~ separated i have another separated ^ separate and need to replace at occurrence of ^ at position 2 : Eg: 1 with K:

laune Over a year ago

In this situation I would use the split/join approach with a recursive version of repSection and with modified arguments: repSection( String[] dels, int[]counts, String rep ).

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