This is the command numgrep that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
numgrep - This program is the numeric equivilent of the grep utility.
SYNOPSIS
numgrep [-dhlV] <FILE>
| numgrep [-dhlV] (Input on STDIN from pipeline.)
numgrep [-dhlV] (Input on STDIN. Use Ctrl-D to stop.)
DESCRIPTION
numgrep searches for different occurances of numbers through the use of numeric
expressions.
OPTIONS
-l Print the matching numbers out one per line
instead of printing the entire line they are on.
-h Help: You're looking at it.
-V Increase verbosity.
-d Debug mode. For developers
EXPRESSIONS
numgrep uses a special numeric expression matching system. Basically, it searches for
ranges, factors and sequences of numbers. Here is a list of the syntax characters and
some sample expressions that will get you going:
/<expression>/
Put your expression or set of expressions between these
two forward slashes.
.. Range expression. A number must be used on the left
and/or right of this expression to specify that numbers
between, greater than or less than the numbers specified
should be matched.
, Expression sepeartor. The comma sepearates one complete
expression from another in a set enclosed by //.
m<n> Multiples of <n>. This operator, followed by a number
<n> will match any number <x> that is an integer
multiple of <n>. Meaning that <x> = <n> times <y>,
where <y> is any integer.
f<n> Factors of <n>. This operator, followed by a number <n>
will match any number <x> that is an integer factor of
<n>. Meaning that <x> = <n> divided by <y>, where <y>
is any integer.
NOTE: Checking for factors and multiples is very fast because it
is checked by doing a single modulus operation on two numbers.
Examples:
/2..10/ Match any number between 2 and 10.
/2..10,20..30/ Match any number between 2 and 10 or between 20 and 30.
/56,34,512,45,67/ Match any of the numbers 56, 34, 512, 45 or 67.
/m3/ Match any integer that is a multiple of 3.
/f1024/ Match any integer that is a factor of 1024.
$ numrange -N /1..1000/ | numgrep /f1024/
1
2
4
8
16
32
64
128
256
512
$
Use numgrep online using onworks.net services
