Rhino

To use linq with Rhino it is necessary to modify the source code of linq.js to the conditions of Rhino:

• Rhino does not support variable declaration with let and const, therefore these must be replaced by var.
• Rhino does not support export declaration, therefore the line export default Enumerable; at the end must be deleted.
• Rhino has no console window, therefore it is recommended to replace the code sequences if (typeof console !== Types.Undefined) { console.log(...); } with java.lang.System.out.println(...).

You can find a suitably modified version of linq.js as linq.class.js here. With the load command you can use it inside Rhino JavaScript.

A very detailed example is available here, this shows how to use it.

Hints

• Rhino supports arrow functions since version 1.7.8. If an older version is used, only regular functions can be used.

// Begin----------------------------------------------------------------

load("linq.class.js");
var Enumerable = LINQ();

// Arrow function expression aka arrow function
var resultArrow = Enumerable.range(1, 10)
  .where((i) => i % 3 == 0)
  .select((i) => i * 10);

java.lang.System.out.println(
  JSON.stringify(resultArrow.toArray())
); // [30,60,90]

// Function expression aka regular function
var resultFunction = Enumerable.range(1, 10)
  .where( function(i) { return i % 3 == 0 } )
  .select( function(i) { return i * 10 } );

java.lang.System.out.println(
  JSON.stringify(resultFunction.toArray())
); // [30,60,90]

// End------------------------------------------------------------------

• linq supports only lambda syntax (dot notation) and not query expression.

// Begin----------------------------------------------------------------

load("linq.class.js");
var Enumerable = LINQ();

var range = Enumerable.range(1, 10);

// Lambda syntax
var result = range
  .where( function(i) { return i % 3 == 0 } )
  .select( function(i) { return i * 10 } );

/* Query expression is not supported
var result = from i in range where i % 3 == 0 select i * 10;
 */

java.lang.System.out.println(
  JSON.stringify(result.toArray())
); // [30,60,90]

// End------------------------------------------------------------------