let example0a = ["a", "c", "c", 1, 2, 3];
example0a = "b";
// Array after this change: ["a", "b", "c", 1, 2, 3];
The key to unlocking the power of computer programming is conditional flow control, the if-then-else constructs which cause the program to perform separate actions depending upon the evaluation of some Boolean (true or false) assertion. SQL has its own conditional flow control; the SQL Case statement.
A characteristic of persistent storage, including relational databases, is the ability to create, read, update, and delete information. This is known as “CRUD”; for databases these SQL actions map to CRUD like this:
Every web user has heard of a cookie at some point; we have to accept them at most websites we visit. Usually, we choose to accept them because a dialog box blocks our way, and then we go about our day. Those dialog boxes don’t tell us much about what a cookie is, though, and how many of us have really stopped to think about what they are?
setInterval(). Each function defines specific times that dynamic events should happen; they work differently and are best used in different contexts..