For #1: if(isGirl) is not a shorthand for if(isGirl === true) because the first condition will always pass if the value is truthy whereas later will only pass if the value is boolean true.
For #3: Arrow function is not a shorthand for the traditional function. Because arrow functions are lexical meaning this inside an arrow function will only have lexical scope. So it can not be bind, call or applied against another context.
For #1:
if(isGirl)is not a shorthand forif(isGirl === true)because the first condition will always pass if the value is truthy whereas later will only pass if the value is boolean true.For #3: Arrow function is not a shorthand for the traditional function. Because arrow functions are lexical meaning
thisinside an arrow function will only have lexical scope. So it can not be bind, call or applied against another context.For #12 and #15 see this commented
Also, the arrow function in this case isn't hoisting,
function expressions (aka the longhand) will hoist.