JS hoisting in functions

gistfile1.txt

hoisting in functions concern variables

The var statement gets spit into two parts:
  The declaration part gets hoisted to the top of the function, initializing with undefined.
  The initialization part turns into an ordinary assignment.
  
    var myVar = 0, myOtherVar;
    
  Expands into
    
    var myVar = undefined,
        myOtherVar = undefined;
        
        myVar = 0;
        
Rule of thumb: declare and initialize vars at the beginning of a function