Revision as of 22:19, 28 February 2020

Motivation

The power of a language is almost entirely in the notations and simplifications that are provided. Kenneth Iverson in his paper (http://www.eecg.toronto.edu/~jzhu/csc326/readings/iverson.pdf Notation as a Tool of Thought) details the importance of good notation to assist making thought easier.

z^3 expands on Javascript notations, and then enhances the notation to allow easy expression and simplicity.

Apart from a rich operator and notation set, the motivation of the z^3 language is to be as close to normally used mathematical notation (such as Σ, !, .. ,etc.) as commonly used.

Operators

Assignment Operators

z^3 allows assigning values to the left as well as to the right using <== and ==> operators. This allows better expressivity for more logical thinking.

a <== 23; 23 ==> a;

a <== 23; is equivalent to a=23; and both notations are equivalent in z^3.

:= : Quick Function Creation Operator

The quick function creation operator in z^3 ( := ) is similar to the => operator in Javascript. However, the advantage of := operator is that the parameters are not named explicitly (and is autodetected). For example to define a function such as v=u+a*t, v:=u+a*t is sufficient, and the parameters u, a and t are auto detected.

Any variable names with lowercase (such as ab, cde, etc) with less than 3 characters in length, is considered to be a local variable. All other names (including any longer variable lowercase names) are checked to see if there is a similar name already in a higher or global scope, and in which case, will not be treated as a local variable.

The => function definition operator in normal Javascript, differs slightly. Hence to define a function such as v=u+a*t, in Javascript (as well as z^3), it would require us to indicate it as v=(u,a,t)=>u+a*t;

The := operator in z^3 hence allows avoiding explicitly repeating the parameter names again in the argument list and function body.

v:=u+a*t and v=(u,a,t)=>u+a*t; both are equivalent to

  function v(u,a,t)
  { 
     return(u+a*t)
  }

@: Function Apply Operator

1..100@SIN

~: Transpose Operator


[[[1..10]~]~]~

↑ and ↓: Ascending and Descending Operator

	
	MAGICSQUARE(5)!
	(1..100)↓
	(1..100)↑

⧓,⧒,⧒ and ⋈: Between Operators

	a=-1;
	⧓(1,a,30)
	a=29;	
	⧓(1,a,30) //between g
	
	a=31;
	⧒(1,a,30) //xlbetween g
	a=30;
	⧒(1,a,30) //xlbetween g
	
	⧒(1,2,30) // xlb g
	⧒(1,1,30)
	
	a=29;
	⋈(1,-1..31,30);
	
	⧓(1,-1..5,4);
	
	[
		⧓(1,1,30),
		⧓(1,0,30),
		⧓(1,10,30),
		⧓(1,31,30),
		⧑(1,29,30),
		⧑(1,30,30),
		⧑(1,1,30),
		⧑(1,30,30),
		⋈(1,1,30),
		⋈(1,3,30)
	]

√: Square Root, Cube Root, Fourth Root and Nth Root Operators

	√(3+34)
	∛(27.01)
	√√64
	ROOTNTH(1..10,4) 
		// root is first parameter
	NTHROOT(1..10,4)
		// root is second parameter
	
	NTHROOT(1..100,2)
	NTHROOT(1..100,4)
	ROOTNTH(1..100,2)
	ROOTNTH(1..100,4)
	3√81

Logical Statements

If Statements

    a=3;
    (a<0)::{"whatever"},
    {
		!(a>4)::
			{"whateverelse"},
			{"whateverelseleft"}
    }  
	
    (a>4)::
	{"whateverelse"},
	{"whateverelseleft"}
			

   (b<0)::b=34,b=345;
   is equivalent to 
   if(b<0)
   {
      b=34;
   }
   else
   {
      b=345;
   }

   Both notations are equivalent and will work in z^3.

Switch Statements

Apart from the conventional Javascript switch statement syntax, z^3 enhances language simplicity with a new style.

The new z^3 switch statements syntax is as follows.


	discriminant:::
	{
           x, y:: 
        	  /*statements to be executed if x or y is true*/
        	  /*Break is automatically added. */
        	  /*Simply add an empty statement using a simple extra semicolon (;)) */
            ,
	   z:: 
        	  /*statements to be executed if z is true*/
            ,
	   default::
	}

For example,
	b=0;
	c=343;
	fruits="mango";
	fruits:::
	{
        "apple","tomato":: 
        	   b++;
        	   c=3.4;
           ,
	"mango":: 
        	   b=34905; 
                
            ,
        default::
        	
                b=45.6;
            
	}
	[b,c];  
	
	switch(a)
	{
		case b:
		case c:
			break;
		default:
			break;
	}

Both notations work in z^3

Loops

	a=1;
	do
	{
		a++
	}
	until(a>20); // do while(!condition)
	a; // here this will be 21, since !condition is checked like a do while loop.
	
	a=11;
	b=45;
	because(a<b)
	{
		a++
		OUTPUT(a)
	}
	
	a=11;
	do
	{
		a++
	}
	unless(a==11); 
	a;

Function Declarations

	function y(x)
	{
		∵(x<345)
		{
			∴(x+3434)
		}
		∵(x>345)
		{
			∴(x-3434)
		}
	}
	y(13);

The letter Ƒ can also be used instead of the full term function.
	
	Ƒ y(x)
	{
		∵(x<345)
		{
			∴(x+3434)
		}
		∵(x>345)
		{
			∴(x-3434)
		}
	}
	y(13);

Existential Quantification

	a=1..100;
	∀a("x<810")
	∃a("x<810")
	∄a("x<810")
	
	a=1..100;
	[∀a("x<810"),∃a("x<810"),∄a("x<810")]
	a=1..100;
	[∀a("x<810"),∃a("x<810"),(!∄a("x<0"))]
	
	a=1..100;
	b= ∀a("y*2<200");
	b.result
	
	a=1..100;
	b= ∀a("y*2<=50");
	a.pick(b.result)
	
	//make a pick operator based on a similar array of true false. or non-existant to get the values out.
	//PICK
	
	a=1..100;
	b= ∀a("y*2<50");
	a.pick(b.result)

List of Operators


+,  -,  *,  /, ^, %	 - Arithmetic Operators
| |    - Array Function and Creation Operator
..     - Arithmetic and Geometric Series Creation
...    - Arithmetic and Geometric Series Creation	
@      - apply to
#      - Series or Special Case Qualifier for Dates, Calci  Cells, and Sequences, etc.
##    - Prefix used to indicate long variable names with spaces. 
         (e.g., ##Speed of the Car=34, which gets translated to SpeedoftheCar = 34;)
<<<    - Member or Variable Assignment
()     - Function Call
[]     - Set Creation
       - Object Set 
       - Set Object Membership
.      - Member Function Dereferencing.	
. mf   - Member Function
.$ mf(function, parameters)   - Element-wise Function Application
.$$ mf (special	        – Row-wise Function Application
.$$$ mf (special) 	– Column-wise Function Application
.$_ mf (special)	- Cumulative Function Application (all)

::     - If
:::    - switch

=     - Assignment to the left
<==   - Assignment to the left
==>   - Assignment to the right
:=    - Quick function definition operator. 

All operators in Javascript, also have the same meaning in z^3, except binary operators such as |, & and ~. 
Binary | is used to indicate matrix boundaries, and is replaced with |||.
Binary & is used to indicate matrix boundaries, and is replaced with &&&.
Binary ~ is used to indicate matrix boundaries, and is replaced with ~~~.

Short Cut Keys

CTRL+G - to convert into Greek Code
CTRL+U - Converts SIGMA to Σ
SHIFT+ENTER- Gives Parameter Expansion
Double tap SHIFT - Toggle Capital and Small Letter [Ex: Convert FRACTAL to fractal and vice verse]
CTRL+SPACE - Function Listing

z^3 Notable Features for Simplicity in Programming

Variable Names with Spaces in z^3

Variables with spaces can be used in z^3. Such variables need to be prefixed with ##

Example:

##Value Of Color = 34;

In the background, this is converted to a

ValueOfColor = 34;

Complex Numbers

Complex numbers can be expressed as given below.

SIN((1..10)+ⅈ3)

To type ⅈ, simply type com then (shift+space). The real part can be given in a loop as an array.

International Natural Language Script Support

Programs can be written in z^3 using any natural language script. The symbols box on the More section of the code editor can be used to type in from any language supported by Unicode, including emojis. Also mathematical notations such as π can be used as is. To type pi as π, first type pi in the code editor followed by SHIFT+SPACE. Only a few letters (such as alp) is required to type in alpha, for example, α. CTRL+U may be used to enter capital letter: Σ can be entered by sig and CTRL+U.

<< Back to Z3 home

Difference between revisions of "Z^3 Language Documentation"