2. The infamous semicolon
; is used to separate statements. However, it's not always necessary to use one. This can lead to some confusion and laughter:
3. Truthy and falsy values
true in a boolean context, while falsy values evaluate to
false. Here's a joke that highlights this concept:
Because it always gets the truth, the whole truth, and nothing but the truth.
Because he used
typeofon a penny and got a "string" instead of a "number."
== operator compares values, whereas the
=== operator compares both values and types. This can lead to some funny situations:
==I kind of guess, but with
===I'm really sure."
6. The classic array joke
Because it didn't know its own length.
undefined are two distinct values that represent the absence of a value. However, they can sometimes cause confusion:
8. The famous
NaN stands for "Not a Number" and represents the result of an undefined or unrepresentable mathematical operation. Here's a joke about this quirky value:
Because he couldn't find a match on NaNder (the dating app for numbers).
typeof NaN irony
To add to the confusion surrounding
typeof operator returns "number" when applied to
NaN. This leads to the following joke:
Array(16).join("wat" - 1) + " Batman!" joke
Array(16).join("wat" - 1) + " Batman!"return?
0.1 + 0.2 !== 0.3 problem
0.1 + 0.2 !== 0.3.
12. The hoisting joke
Because it was hoisted.
parseInt("10", 2)returned 2 instead of 10.
14. The callback hell joke
Callback hell is a term used to describe a situation where multiple nested callbacks make the code difficult to read and maintain. Here's a joke about this phenomenon:
Because of callback hell.
15. The closure joke
Because they always have access to the outer scope.
this keyword joke
this keyword can be quite confusing due to its various rules and behavior:
Because he didn't know the value of
17. The prototype joke
Because it had a prototype infection.
18. The async and await joke
Because he learned about async and await.
19. The recursion joke
Because of recursion... because of recursion... because of recursion...
20. The try-catch joke
Just in case he encountered some unexpected "rain" (errors) and needed a try-catch block.