Line 72 ";" needed?

Perhaps the reason Jim did not include a semi-colon at the end of the function statement is because it was the LAST statement in the source code. During runtime, the JavaScript interpreter distinguishes one statement from another when it encounters a semicolon as it executes from top to bottom. Essentially the semicolon tells the computer, "Ok, move on to the next instruction". In this case since the anonymous function was the last statement, the computer executed the function and stopped executing the source code since it had reached the end. Had Jim included another snippet of code below that function, say a sum of two numbers, there would have been an error.

To Illustrate this idea look at the following code:

console.log("This statement requires a semicolon at the end to tell the javascript interpreter to move on to the command below");
console.log("This statement does not, and will not produce any errors")

I would not advise doing this in a real-world production environment, however, since this scenario could cause bugs in the future as a codebase grows. So yeah, by not including a semi-colon Jim deviated from a coding best practice. Always remember to put a semi colon at the end of every statement! Even if it's the last one :)