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Full Discussion: Bash script problems int to binary
Top Forums UNIX for Beginners Questions & Answers Bash script problems int to binary Post 303041391 by Chubler_XL on Friday 22nd of November 2019 05:58:24 AM
Old 11-22-2019
you could write a bash function like this:

Code:
dec2bin () {
  # dec2bin num [width] [var]
  local num bin=""
  for((num=$1;num;num/=2))
  do
    bin=$((num%2))$bin
  done
  ((${#3})) &&
      printf -v ${3} "%0*d" ${2:-1} $bin ||
      printf "%0*d\n" ${2:-1} $bin
}

# example calls
dec2bin 59
dec2bin 59 8
dec2bin 23 5 test
echo 23 in binary is $test

output:
Code:
111011
00111011
23 in binary is 10111

Last edited by Chubler_XL; 11-23-2019 at 01:37 PM.. Reason: num should be a local variable to
 

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LEARN ABOUT CENTOS

tchmttest

TCHMTTEST(1)							   Tokyo Cabinet						      TCHMTTEST(1)

NAME

       tchmttest - test cases of the hash database API

DESCRIPTION

       The command `tchmttest' is a utility for facility test under multi-thread situation.  This command is used in the following format.  `path'
       specifies the path of a database file.  `tnum' specifies the number of running threads.	`rnum' specifies the number of iterations.  `bnum'
       specifies the number of buckets.  `apow' specifies the power of the alignment.  `fpow' specifies the power of the free block pool.

	      tchmttest write [-tl] [-td|-tb|-tt|-tx] [-rc num] [-xm num] [-df num] [-nl|-nb] [-as] [-rnd] path tnum rnum [bnum [apow [fpow]]]
		     Store records with keys of 8 bytes.  They change as `00000001', `00000002'...
	      tchmttest read [-rc num] [-xm num] [-df num] [-nl|-nb] [-wb] [-rnd] path tnum
		     Retrieve all records of the database above.
	      tchmttest remove [-rc num] [-xm num] [-df num] [-nl|-nb] [-rnd] path tnum
		     Remove all records of the database above.
	      tchmttest wicked [-tl] [-td|-tb|-tt|-tx] [-nl|-nb] [-nc] path tnum rnum
		     Perform updating operations selected at random.
	      tchmttest typical [-tl] [-td|-tb|-tt|-tx] [-rc num] [-xm num] [-df num] [-nl|-nb] [-nc] [-rr num] path tnum rnum [bnum [apow [fpow]]
		     Perform typical operations selected at random.
	      tchmttest race [-tl] [-td|-tb|-tt|-tx] [-xm num] [-df num] [-nl|-nb] path tnum rnum [bnum [apow [fpow]]
		     Perform race condition test.

       Options feature the following.

	      -tl : enable the option `HDBTLARGE'.
	      -td : enable the option `HDBTDEFLATE'.
	      -tb : enable the option `HDBTBZIP'.
	      -tt : enable the option `HDBTTCBS'.
	      -tx : enable the option `HDBTEXCODEC'.
	      -rc num : specify the number of cached records.
	      -xm num : specify the size of the extra mapped memory.
	      -df num : specify the unit step number of auto defragmentation.
	      -nl : enable the option `HDBNOLCK'.
	      -nb : enable the option `HDBLCKNB'.
	      -as : use the function `tchdbputasync' instead of `tchdbput'.
	      -rnd : select keys at random.
	      -wb : use the function `tchdbget3' instead of `tchdbget'.
	      -nc : omit the comparison test.
	      -rr num : specify the ratio of reading operation by percentage.

       This command returns 0 on success, another on failure.

SEE ALSO

       tchtest(1), tchmgr(1), tchdb(3), tokyocabinet(3)

Man Page							    2012-08-18							      TCHMTTEST(1)
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