numgrep1

Usage

Overview

numgrep searches for different occurrences 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 separator.  The comma separates 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
    $

More info

More info on numgrep can be found at:

http://suso.suso.org/xulu/Num-utils