scope

annotated.js

function(
  a, // an object representing the intended scope
  b, // a function containing unreferenced variables to be bound
  c, // (placeholder)
  d, // (placeholder)
  e  // (placeholder)
){
  c = []; // define a list of names, and
  d = []; // a list of referents to which they refer.

  for(            // for each
    e             // name
    in a          // in the scope object,
  ) d[            // set, at the index
    c.push(e)     // at which the name is pushed
    - 1           // minus 1,
  ] = a[e];       // the referent to which the name refers.
  
  c.push(         // at the end of the list of names,
    "return " + b // push an expression returning the serialized function.
  );
  
  return(         // return
    e = Function  // a new function (while caching the Function reference),
  )
  [b = "apply"]   // applied using
  (e, c)          // the list of names and function body,
  [b]             // and then apply that
  (this, d)       // with the global scope and list of referents. whew!
}

index.js

function(a,b,c,d,e){c=[];d=[];for(e in a)d[c.push(e)-1]=a[e];c.push("return "+b);return(e=Function)[b="apply"](e,c)[b](this,d)}

LICENSE.txt

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                    Version 2, December 2004

 Copyright (C) 2011 Jed Schmidt <http://jed.is>

 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. You just DO WHAT THE FUCK YOU WANT TO.

package.json

{
  "name": "scope",
  "keywords": [ "scope", "compile" ]
}

test.js

// Define a function that refers to things that don't exist.

function fn(){ console.log( OH - NO - YOU - DINT|!!!!!!!!11 ) }

// Then call it and watch it throw.

try       { fn(); console.log( "no problem at all!" ) }
catch (e) {       console.log( "problem: " + e.type ) }

// => "problem: not_defined"

// No worries, crazy scope function to the rescue!

var scope = function(a,b,c,d,e){c=[];d=[];for(e in a)d[c.push(e)-1]=a[e];c.push("return "+b);b="apply";return(e=Function)[b](e,c)[b](this,d)}

// All we have to do is define the scope we're expecting,

var OHYESIDID = {OH:1, NO:1, YOU:1, DINT:1}

// an then apply it to our function.

fn = scope( OHYESIDID, fn )

// then, we we try the same thing as before,

try       { fn(); console.log( "no problem at all!" ) }
catch (e) {       console.log( "problem: " + e.type ) }

// -1
// => "no problem at all!"

// EVERYTHING TURNED OUT BETTER THAN EXPECTED!