Question

Consider the following JavaScript-like program: 1 function subl) 2 var x 4 function sub2) // creates a popup box alert (x) 9 function sub3) 10 var x x3 sub4 (sub2); 12 13 14 15 function sub4 (subx) 16 17 18 19 20 21 22 ub30 23 24 subl 0; var x subx ) Give the output of this program when executed using a. (2p) deep binding Solution b. (2p) shallow binding Solution C. (2p) ad-hoc binding Solution

Answer 1

Answer:

(a) deep binding: Referencing environmentsub1 So the reference to x in sub2 is the local x in sub1. Output: 1 (b) shallow binding: Referencing environment sub4 So the reference to x in sub2 is the local x in sub4. Output: 4 Referencing environment sub3 So reference is to the local x in sub:3. Output: 3