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Dart v0.1
cluster and sample and contrast

About

Name

dart

Description

Optimize = cluster plus sample plus contrast; i.e. Divide problem space into chunks; dart, a little, around the chunks; report back anything that jumps you between chunks.

Usage

  lua dart.lua [Options] [--Group Options]* 

Options start with "-" and contain 0 or 1 arguments. Options belong to different Groups (which start with --).

Options

-C           ;; show copyright   
-h           ;; show help   
-H           ;; show help (long version) 
-seed 1      ;; set random number seed   
-U fun       ;; run unit test 'fun' (and `all` runs everything)
-R fun       ;; run test function
-id 0        ;; counter for object ids
--test       ;; system stuff, set up test engine    
   -yes   0  
   -no    0
--stats
   -cohen       .2
   -cliffsDelta .147
   -bootstrap   256
   -confidence  .95
   -enough      .50
--some
   -max   256
   -few    64
--type       ;; when reading csv files, names in row1 have
             ;; magic symbols telling us their type.
   -klass !  ;; symbolic class
   -less  <  ;; numeric goal to be minimized
   -more  >  ;; numeric goal to be maximized
   -num   :  ;; numeric
   -skip  ?  ;; to be ignored

Requirements

• Lua >= 5.3

Install

• Install Lua 5.3

• Download dart.lua

• Run and execute the unit tests

  lua dart.lua -U

If that all works then you see one failing test (when we test the test engine) and everything else passing.

How to Contribute

Please follow these Lua-isa-simple-language-so-lets-keep-it-simple conventions:

• Source code
  • All source code in one file.
    • All locals listed at top;
    • Application specific code at top;
    • General utilities at bottom,
    • Unit tests under nearly everything else, inside the Eg variable.
    • Second last is the main function to be called if this code is not included into another library:
      • And I test for that using not pcall(debug.getlocal, 4, 1).
    • Finally, there is a return statement that exports the more useful parts of the code.
  • No globasl (so keep the list of locals at top of file up to date).
  • The the local handles information and defaults shared across all functions and classes.
    • And this variable is initialized by parsing the Usage section of this help text/
  • Minimize use of the local keyword (so ugly)
    • Use it once at top of file.
    • Then (usually) define function locals as extra input arguments.
  • Indent code with 2 characters for tabs.
  • Using classes to divide the code.
    • Update the non-class library code rarely (since that is functions global to the module).
    • Update the class code a lot.
  • Classes:
    • Use classes for polymorphism.
    • Don't use inheritance (adds to debugging effort).
    • Classes are created by assigning some defaults to a global value;
      e.g. Emp={lname="", fname="", add=address() }
    • Class constructors are lower case functions that call isa(X) (where X is some class).
      • Typically for some Klass, the constrictor is the same name, starting with lower case (e.g. klass).
      • Constructors often use the idiom new.x = y or the.zzz.y where y is a parameter- S

Contact

Copyright 2020,
Tim Menzies,
timm@ieee.org

Copyright

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Some(i:list0, max:pos) :nil

Constructor for Some objects that keep a random sample of atoms.

• i.n is now many things were set to this Some
• i.all is all the fhings kept (may be less that i.n
• i.max is the maximum number of things kept (and if we keep more than that, then order things (selected at random) will be removed.
• i.ok is false when i.all has been updated, but not resorted yet.

Returns fred

ok(i:Some) :nil

Ensure contents are sorted

var(i, lo,hi)