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Top Forums Shell Programming and Scripting Extracting few lines from a file based on identifiers dynamically Post 302576231 by vivek d r on Thursday 24th of November 2011 04:50:15 AM
Old 11-24-2011
Yes Mr.bean.. i will be using it in only one while loop.. for the while loop runs many times(runs as number of tables present in the file) for eg in mysqldump.sql there are 3 tables so the while loop runs 3 times. so in the 1st run of while loop table11 is copied to a temporary file and closes the file. i will be performing some operations on extracting this file content. in the second run of while loop (we can consider for loop insteaded of while loop running on i<3 incrementing i everytime) table22 is written to same file and process goes on. your code does the job but it will be doing it in one shot. even if i try it in for loop or while loop the code which you sent writes the last table to file everytime. cause its designed to overwrite tables in one run or one shot. in the java code which i sent there is a line called br.readLine(). this line is like a pointer it stops and starts from where it left of in prvious run of loop. so in first run br.readLine write table11 in second run br.readLine write table22 and 3rd table33. hope you understood what i am trying to achieve... :-/
example:
Code:
While [some condition]    // i can use for loop too
(condition say when i=0)
do
     your code goes here...which writes table11 to tmp.sql
     my code goes here which read from this tmp.sql file which has table11 and do some function
done

in the same loop when i=1 table22 is written to temporary file.. and when i=2 table33 is written to file..

---------- Post updated at 02:52 PM ---------- Previous update was at 02:40 PM ----------

is there any code in shell scripting which performs the function of ".contains" of java
i mean
somevariable has a sentence or long line say
Code:
somevariable="this is a line to show CREATE TABLE sometablename is used to create table"

Code:
 
if(somevariable has "CREATE TABLE")
then
       counter++;
fi

---------- Post updated at 02:55 PM ---------- Previous update was at 02:52 PM ----------

i got the answer for .contains...
if [[ $var == *CREATE* ]]
then
echo "its present"
fi

---------- Post updated at 03:20 PM ---------- Previous update was at 02:55 PM ----------

sorry the above one dint workout.. however below one worked :-)
Code:
while read line1
do
        if [[ `expr match "$line1" ".*CREATE TABLE.*"` != "0" ]]
        then
                counter1=`expr $counter1 + 1`
        fi
done < counterfile1.sql

 

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MARC::Charset::Table(3pm)				User Contributed Perl Documentation				 MARC::Charset::Table(3pm)

NAME
MARC::Charset::Table - character mapping db SYNOPSIS
use MARC::Charset::Table; use MARC::Charset::Constants qw(:all); # create the table object my $table = MARC::Charset::Table->new(); # get a code using the marc8 character set code and the character my $code = $table->lookup_by_marc8(CYRILLIC_BASIC, 'K'); # get a code using the utf8 value $code = $table->lookup_by_utf8(chr(0x043A)); DESCRIPTION
MARC::Charset::Table is a wrapper around the character mapping database, which is implemented as a tied hash on disk. This database gets generated by Makefile.PL on installation of MARC::Charset using MARC::Charset::Compiler. The database is essentially a key/value mapping where a key is a MARC-8 character set code + a MARC-8 character, or an integer representing the UCS code point. These keys map to a serialized MARC::Charset::Code object. new() The consturctor. add_code() Add a MARC::Charset::Code to the table. get_code() Retrieve a code using a hash key. lookup_by_marc8() Looks up MARC::Charset::Code entry using a character set code and a MARC-8 value. use MARC::Charset::Constants qw(HEBREW); $code = $table->lookup_by_marc8(HEBREW, chr(0x60)); lookup_by_utf8() Looks up a MARC::Charset::Code object using a utf8 value. db() Returns a reference to a tied character database. MARC::Charset::Table wraps access to the db, but you can get at it if you want. db_path() Returns the path to the character encoding database. Can be called statically too: print MARC::Charset::Table->db_path(); brand_new() An alternate constructor which removes the existing database and starts afresh. Be careful with this one, it's really only used on MARC::Charset installation. perl v5.12.4 2010-09-09 MARC::Charset::Table(3pm)
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