Operator 0.1.7 0.1.7
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Free Version
Publisher Description
Operator 0.1.7 - You like Javascript, functional programming and Android? Try Operator !
A simple Javascript transpiler program to code in a functional language looking like another famous functional programming language (beginning with an H.)
Each translation can be integrated in your web page via a single javascript script, provided you also installed jqMath (http://mathscribe.com/author/jqmath.html) -- with jQuery -- and Numeric Javascript (http://www.numericjs.com).
Like H., Operator
* is functional
* is little verbose
* understands binary operation's infix notation
Unlike H., Operator
* is not lazy in essence but infinite structures (lists, trees...) can be implemented
* is untyped
* doesn't have a lower/upper cases distinction
* doesn't assume any priority for binary operations
* doesn't regard ' (simple quote) as a valid syntactic symbol
* is at a very early stage
Regarding purity, Operator works most of the time with immutable variables and structures but occasionnally (after the interact keyword) some states can be modified (content of an HTML document for example, see Demos).
PRIMITIVE BUILT INS:
Only +,-,*,/,%,==,,substring,length are kept literally from javascript with the same meaning they have in javascript (+ is polymorphic for example). They are now regarded as functions of 2 arguments (except unary length and ternary substring).
The get method has become the ! function
Eg: var val=obj['black']+xs[0]; becomes val = (obj!"black")+(xs!0)
A javascript Array is called a List in Operator
Eg: var xs=[1,2]; becomes xs = List () 1 2 ()
A javascript Object is called a Map in Operator
Eg: var obj={'red':0,'black':1}; becomes obj = Map () "red" 0 "black" 1 ()
These are designed to be immutable and, as functions, the following is valid:
beg = List () 1 2 3
next = beg 4 5
xs = next 6 ()
, the last () giving the end of the structure (the first one creates an new instance). It would then be reckless to defined ys = next 7 () for the (impredictible) order in which xs and ys are processed would influence the result of xs!5 (which could give 6 or 7 accordingly). Instead, define a new immutable List: ys = List () 1 2 3 4 5 7 ()
Several useful document manipulation fonctions are available also:
:=, ::=, newline, value, math, input, button, interact (see Demos)
Several useful general fonctions are available also:
hex2char, dec2hex, hex2dec
The other javascript components can be accessed by the javascript keyword (see below).
And thats'all for the primitive built-ins!
FOREIGN BUILT-INS:
Foreign JAVASCRIPT:
Operator only knows a very small set of primitive keywords and operators but all the javascript functions can be accessed with the javascript keyword. Eg:
sqrt x = javascript (("Math.sqrt("+x) + ")")
or, better,
sqrt = javascript "var fun=function(x){return Math.sqrt(x);};fun"
or simply
sqrt = javascript "Math.sqrt"
Foreign JQMATH:
If the result of a computation satisfies the jqMath format (http://mathscribe.com/author/jqmath.html), it will be displayed as a mathematical formula. For example
main = "$355/113$"
will display a nice fraction on the screen, and on your web page if you install the script (sent by the "Send javascript" menu) and the jqMath script.
Foreign NUMERIC JAVASCRIPT:
All the numericjs functions (http://www.numericjs.com) can be used. For example
m=List () row1 row2 ()
row1=List () 2 5 ()
row2=List () 6 3 ()
determinant = javascript "numeric.det"
main=determinant m
will return -24. Note that there is no shortcut (as in sqrt above) for the definitions of the numeric functions of 2 or more variables. For example, with the first four lines above and
main = determinant (product m m)
you should define
product = javascript "var fun=function(x){return function(y){return numeric.dot(x,y);};};fun"
in order to get 576.
About Operator 0.1.7
Operator 0.1.7 is a free app for Android published in the Teaching & Training Tools list of apps, part of Education.
The company that develops Operator 0.1.7 is Jö. The latest version released by its developer is 0.1.7.
To install Operator 0.1.7 on your Android device, just click the green Continue To App button above to start the installation process. The app is listed on our website since 2019-10-22 and was downloaded 11 times. We have already checked if the download link is safe, however for your own protection we recommend that you scan the downloaded app with your antivirus. Your antivirus may detect the Operator 0.1.7 as malware as malware if the download link to joel.duet.opera is broken.
How to install Operator 0.1.7 on your Android device:
- Click on the Continue To App button on our website. This will redirect you to Google Play.
- Once the Operator 0.1.7 is shown in the Google Play listing of your Android device, you can start its download and installation. Tap on the Install button located below the search bar and to the right of the app icon.
- A pop-up window with the permissions required by Operator 0.1.7 will be shown. Click on Accept to continue the process.
- Operator 0.1.7 will be downloaded onto your device, displaying a progress. Once the download completes, the installation will start and you'll get a notification after the installation is finished.
