Format.lua

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Contents

dostounix

INPUT:
This library function required the following inputs/parameters.

  • file contents
    • Example: c = file:read("*a")
  • String with EOL

OUTPUT:
This library function deliverers the following output/parameters.

  • Output is returned minus the \r characters

CODING EXAMPLE:

-- Include/Call for this library
require("format")
-- file test.txt is from dos/windows
require "format"
f = io.open("test.txt")
c = f:read("*a")
file = format.dostounix(c)
f:close()
--file now contains the contents of test.txt without the \r char

remove_blanks_comments

INPUT:
This library function required the following inputs/parameters.

  • Path
    • Example: /root/mynotes

OUTPUT:
This library function deliverers the following output/parameters.

  • Returns a table to iterate over minus the blank and commented lines

CODING EXAMPLE:

-- Include/Call for this library
require("format")
f = io.open("/etc/shorewall/rules")
c = f:read("*a")
t = format.remove_blanks_comments(c)
f:close()
-- t is a table with only pertinent lines

table_to_string

INPUT:
This library required the following inputs/parameters.

  • Delimiter
    • Could be one or more chars.
  • Array
    • Data which is to be joined into a string.

OUTPUT:
This library deliverers the following output/parameters.

  • String
    • Could be something like "Word, Word, Word, Word"

CODING EXAMPLE:

-- Set variable/Call for this library
require "format"
-- Create a array of data (Not sure if the next row is correct)
arraytojoin = { "Bird", "Fish", "Cow", "Hammer" }
-- Process the data (note the delimiter)
liboutput = format.table_to_string(";", arraytojoin)
Bird;Fish;Cow;Hammer

string_to_table

NOTE: for cut functionality do something like
print(format.string_to_table(" ", "This is a test")[2])
gives you the second field which is .... is

INPUT:
This library required the following inputs/parameters.

  • Delimiter
    • Could be one or more chars.
  • String or line from a file: bobo~foo~bar~baz~1
    • Data is to be split into a table

OUTPUT:
This library deliverers the following output/parameters.

  • Table
    • { 1 = "bobo", 2 = "foo", 3 = "bar", 4 = "baz", 5 = 1}

CODING EXAMPLE:

-- Set variable/Call for this library
require "format"
-- Grab the line from a file or input it into the funtcion
line = "bobo~foo~bar~baz~1"
-- Process the data (note the delimiter)
t = format.string_to_table("~", line)
't' would contain: 
{ 1 = "bobo", 2 = "foo", 3 = "bar", 4 = "baz", 5 = 1}
for a,b in ipairs(t) do print(a,b) end
1 bobo
2 foo
3 bar
4 baz
5 1

cap_begin_word

INPUT:
This library required the following inputs/parameters.

  • String

OUTPUT:
This library deliverers the following output/parameters.

  • String with all first letters of words capitalized

CODING EXAMPLE:

-- Set variable/Call for this library
require "format"
-- Grab the line from a file or input it into the function
line = "The rain in spain stays mainly in the plain"
-- Process the data (note the delimiter)
print(format.cap_begin_word(line))
--The Rain In Spain Stays Mainly In The Plain

search_replace

INPUT:
This library required the following inputs/parameters.

  • File path or Table

OUTPUT:
This library deliverers the following output/parameters.

  • Table

CODING EXAMPLE:

-- Set variable/Call for this library
require "format"
t = { "The man ran home", "See the man walk", "The man laughed"}
print(format.search_replace(t, "[Th]he man", "The boy")[1])
--The boy ran home

search_for_lines

INPUT:
This library required the following inputs/parameters.

  • File path or table

OUTPUT:
This library deliverers the following output/parameters.

  • Table
    • THIS WILL SEARCH FOR THE WHOLE LINE CONTAINING THE MATCH

CODING EXAMPLE:

-- Set variable/Call for this library
--say have file like /etc/conf.d/cron with CRON_OPTS="" or more will find them
require "format"
for a,b in ipairs(format.search_for_lines("/etc/conf.d/cron", "OPTS")) do print(a,b) end

Expand Bash Syntax Vars

Expand a string with bash-like variables with lua variables

INPUT:
This library requires the following inputs/parameters.

  • String

OUTPUT:
This library deliverers the following output/parameters.

  • String

CODING EXAMPLE:

animal = { cows=3, dogs=2 }
print (expand_bash_syntax_vars ("You have ${animal.dogs} dogs"))

You have 2 dogs