Hello all;
I have a string like this:
"*475664/779* 475664/780* 475664/4341* 483220/1577*"
I want get these 4 strings locate after "/" and before "*":
779, 780, 4341, 1577,
How to do this?
Another words, If I only want keep characters between'/' and '*' ,what should I do?
Thanks!
There are several methods, I choose this one for brevity:
data want; length result $200; string="*475664/779* 475664/780* 475664/4341* 483220/1577*"; do i=1 to countw(string,"*"); result=catx(",",result,scan(scan(string,i,"*"),2,'/')); end; run;
Does all of your data have this structure?
You can use the scan function...
first=scan(string, 2, "/*");
second=scan(string, 4, "/*);
With regular expression pattern matching:
data want;
if not prx0 then prx0 + prxParse("#\/[^/*]+\*#");
str = "*475664/779* 475664/780* 475664/4341* 483220/1577*";
start = 1;
call prxNext(prx0, start, -1, str, pos, len);
do subStrNo = 1 by 1 while (pos > 0);
subStr = substr(str, pos+1, len-2);
output;
call prxNext(prx0, start, -1, str, pos, len);
end;
keep subStrNo subStr;
run;
proc print data=want noobs; run;
The pattern reads: Character /, followed with one or more characters except / or *, followed by character *.
data _null_;
pid=prxparse("/(?<=\/)\w+(?=\*)/");
str = "*475664/779* 475664/780* 475664/4341* 483220/1577*";
start = 1;
stop=length(str);
length want $ 200;
call prxnext(pid, start, stop, str, pos, len);
do while (pos > 0);
want=catx(',',want,substr(str, pos, len));
call prxnext(pid, start, stop, str, pos, len);
end;
put want=;
run;
Why need two prxnext function? can we remove the first one? and how if I want to keep space symbol?
Thanks!
No. You have to have two call prxnext().
data _null_;
pid=prxparse("/(?<=\/)\s*\w+\s*(?=\*)/");
str = "*475664/ 779 * 475664/ 780* 475664/4341* 483220/1577*";
start = 1;
stop=length(str);
length want $ 200;
call prxnext(pid, start, stop, str, pos, len);
do while (pos > 0);
want=catx(',',want,translate(substr(str, pos, len),'09'x,' '));
call prxnext(pid, start, stop, str, pos, len);
end;
want=translate(want,' ','09'x);
put want=;
run;
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