added new exercice

exo_011/index.html

@@ -0,0 +1,15 @@
+
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+    <title>title</title>
+    <link href="https://cdn.jsdelivr.net/npm/bulma@0.9.4/css/bulma.min.css" rel="stylesheet">
+</head>
+<body>
+
+<div id="livre"></div>
+
+<script src="script.js"></script>
+</body>
+</html>

exo_011/script.js

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+console.log("hello world")
+
+
+// question 1.b
+
+let livre = {
+    nom: "JS the good part",
+    year: 2008,
+    price: 19.75,
+    publisher: "O reilly"
+};
+
+console.log(livre);
+
+function getAttribute(object, key, defaultValue){
+    if(Object.hasOwn(object, key)){
+        return object[key];
+    }
+    return defaultValue;
+}
+
+let key = "age"
+let object = {age: 100};
+let defaultValue = 0;
+console.log("2.a >> " + getAttribute(object, key, defaultValue)) // 100
+console.log("2.a >> " + getAttribute({name: "claudette"}, "name", 0)) // claudette
+
+console.log("2.a >> " + getAttribute({age: 100}, "name", "no name")) // no name
+console.log("2.a >> " + getAttribute({name: "claudette"}, "age", 0)) // 0