04-24-2001
hello, i'm trying to pluck words from a list that have exactly 3 occurances of a specified letter. I've come up with this :
grep -i .*$1.*$1.*$1.*
But this also selects words with 4 or more, any tips?
I'm putting this into a shell procedure and want to be able to add a switch before I put the letter to searched in ($1), if you could point me to the correct manual page to read up on that it would be great, I'm using bourne shell.
Thanks in advance
Steve
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LEARN ABOUT DEBIAN
letterize
LETTERIZE(1) Miscellanea LETTERIZE(1)
NAME
letterize_ - phone-number to letter-mnemonic generator
SYNOPSIS
letterize nnnnnnn
DESCRIPTION
This program tries to help you find a letter mnemonic matching a given phone number.
It emits to standard output each possible pronounceable mnemonic, one per line, using the American standard mapping of dial letters to
numbers (2 goes to ABC, 3 to DEF, 4 to GHI, 5 to JKL, 6 to MNO, 7 to PRS, 8 to TUV, 9 to XYZ).
The program uses a table of pronounceable letter-triples derived from a dictionary scan. Each potential mnemonic must be such that all of
its letter-triples are in the table to be emitted. About 30% of possible triples are considered pronounceable.
A typical 7-digit phone number has 19,683 possible mnemonics, but this test usually cuts the list down to a few hundred or so, a reasonable
number to eyeball-check. For some numbers, the list will, sadly, be empty.
It's best to leave out punctuation such as dashes and parens.
BUGS
The filtering method doesn't know what plausible medial triples are not reasonable at the beginnings and ends of words.
I'm not sure what table position 0 (which is what 0 and 1 are mapped to) means. If you figure it out, you tell me. I really should have
generated my own table, but that would have been more work than this seemed worth -- if your number contains either, you probably need to
generate your mnemonic in disjoint pieces around the digits anyway.
AUTHOR
Eric S. Raymond esr@snark.thyrsus.com. It's based on a table of plausible letter-triples that had no name attached to it. Surf to
http://www.catb.org/~esr/ for updates and related resources.
letterize 05/30/2012 LETTERIZE(1)