First assignment

Contributors.md

@@ -5,4 +5,4 @@
 1. icodejsx  
 2. ogbon(Segun Amosu)
 3. Solomon Eseme
-
+4. Ibrahim oke

RESTAPI assignment

@@ -0,0 +1,41 @@
+let book = [
+{id:1, title: "introduction to REST API", author: "James Bennie"},
+{id:2, title: "introduction to Javascript", author: "Jonas schmdtman"}
+];
+
+//GET METHOS: all books
+app.get("/books", (req, res) => (
+res.send(200).json(books)
+)};
+//GET METHOD: a specific book bt ID
+
+app.get("/book/:id", (req, res) => (
+const { id } = req.params;
+const book = books.findById(id);
+res.send (200).json(books);
+)};
+
+//POST METHOD: Create a new book
+
+app.post("/books", (req, res) => {
+const newBook = req.body;
+books.push(newBook)
+res.send(201)
+});
+
+//PuT METHOD: Create a new book
+
+app.put("/books", (req, res) => {
+const { id } = req.params;
+const updateBooks = req.body;
+const index = book.findIndex(id);
+res.send(201)
+});
+
+//DELETE METHOD: Create a new book
+
+app.delete("/books", (req, res) => {
+const { id } = req.params;
+books = book.find.filter(id);
+res.sned(200)
+});

lexicalScope.md

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+# Lexical Scope
+
+lexical scope is refer to as the location of the function in the source code, which means that a function can access variables from its own scope as well as from the scopes of its outer (enclosing) functions. It also refer to as static scope.
+
+some code example to better explain lexical scope
+
+var a = 10; // variable a assigned to 10
+
+var func = function (){ // outermost function
+    var b = 20;
+    console.log("a and b is accessible (outer):", a, b);
+    var innerFunc= function (){ // innermost function
+        var c = 30;
+        console.log("a and b and c is accessible (innner):", a, b, c);
+    }
+    innerFunc();
+    return;
+}
+func(); // invoke function func 
+console.log("only a is accessible (global):", a);