Identifying repeating characters in an expression

I'm using 10g and am trying to come up with a regular expression that will allow me to identify strings that have repeating characters... e.g. in the Name field, I want to identify all rows where the value is "AAAAAA", "BBBB" - basically, just a set of repeating values. Similarly, for birthdate, I want to identify dates that might look like '99/99/9999' or '88/88/8888'... is there a regular expression I can build for this?
Help is greatly appreciated.

I don't have 10g to hand, but you can do this without regular expressions.
For name_column it would be
select name_column from my_table
where replace(name_column,substr(name_column,1,1)) is null;Of course you wouldn't even need the second part if you weren't working with a incorrectly designed database - dates should always be stored as dates and then 99/99/9999 couldn't even get into the database, but for some reason people keep doing this to themselves.
select fake_date from my_table
where replace(fake_date,substr(fake_date,1,1).'*') = '**/**/****';

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I don't have 10g to hand, but you can do this without regular expressions.
For name_column it would be
select name_column from my_table
where replace(name_column,substr(name_column,1,1)) is null;Of course you wouldn't even need the second part if you weren't working with a incorrectly designed database - dates should always be stored as dates and then 99/99/9999 couldn't even get into the database, but for some reason people keep doing this to themselves.
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where replace(fake_date,substr(fake_date,1,1).'*') = '**/**/****';

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hey guys
well i kinda have a little problem figuring out how to find out
if there are repeated characters in a string.
if anyone can help, would appreciate it.
thanks
milos

Try using the StringTokenizer class. if u already know which character to trace. this could do the job.
eg. String str = "here and there its everywhere";
StringTokenizer st = new StringTokenizer(str, "e");
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Sample code to identify special characters in a string

Hi,
I need to identify special characters in a string.... could anybody send me some code please.......
Thanks,
Best regards,
Karen

data: str(100) type c.
data: str_n type string.
data: str_c type string.
data: len type i.
data: ofst type i.
str = '#ABCD%'.
len = strlen( str ).
do.
if ofst = len.
    exit.
endif.
if str+ofst(1) co sy-abcde.
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else.
    concatenate str_n str+ofst(1) into str_n.
endif.
ofst = ofst + 1.
enddo.
write:/ str.
write:/ str_c.
write:/ 'spacial chracter',20 str_n.
Function module <b>SF_SPECIALCHAR_DELETE</b> <b>DX_SEARCH_STRING</b>
l_address1 = i_adrc-street.
CHECK NOT L_ADDRESS1 IS INITIAL.
len = STRLEN( l_address1 ).
do len times.
if not l_address1+l(1) ca
'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 '.
if i_adrc-street+l(1) CO sy-abcde.
elseif i_adrc-street+l(1) CO L_NUMCHAR.
exit.
endif.
l = l + 1.
enddo.
data : spchar(40) type c value '~!@#$$%^&()?...'etc.
data :gv_char .
data:inp(20) type c.
take the string length .
len = strlen (i/p).
do len times
MOVE FNAME+T(1) TO GV_CHAR.
IF gv_char CA spchar.
MOVE fnameT(1) TO inp2T(1).
ENDIF.
T = T + 1.
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REPORT ZEX4 .
PARAMETERS: fname LIKE rlgrap-filename .
DATA: len TYPE i,
T TYPE I VALUE 0,
inp(20) TYPE C,
inp1(20) type c,
inp2(20) type c,
inp3(20) type c.
DATA :gv_char.
data : spchar(20) type c value '#$%^&*()_+`~'.
START-OF-SELECTION.
CONDENSE fname.
len = strlen( fname ).
WRITE:/ len.
DO len TIMES.
MOVE FNAME+T(1) TO GV_CHAR.
IF gv_char ca spchar.
MOVE fnameT(1) TO inpT(1).
ENDIF.
T = T + 1.
ENDDO.
CONDENSE INP.
write:/ 'Special Characters :', inp.
Rewards if useful..........
Minal

Repeated characters in a string????

hey guys
well i kinda have a little problem figuring out how to find out
if there are repeated characters in a string.
if anyone can help, would appreciate it.
thanks
milos

And now a working version:
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        boolean found = false;
        int i = 0;
        char lastChar = '\0';
        while ((i != word.length ()) && ! found) {
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Number of repeated characters in string array

Hi,
I m trying to get number of repeated characters in string array. I couldnt figure out where am i doing mistake.
thank you,
For example: count({"alpha, beta,"}, 'a')
a is repeated 3
l is repeated 1 etc.
public class Test
public static int count(String[] stringArray, char c)
public String [] str = new String [2];
int count = 0;
str[0]
str[1]
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There is a difference between a String and a String [].
A String [] is an array of String class objects:/* Traverse_Array_Of_Strings_1.java */
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public static void main(String [] argv)
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s= <hello>
h, e, l, l, o,
s= <how>
h, o, w,
s= <are>
a, r, e,
s= <you>
y, o, u,
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http://java.sun.com/javase/6/docs/api/index.html?java/util/regex/Pattern.html
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Expression:
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Identifying repeating characters in an expression

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