update arrey manipulation examples

5-JavaScript/class-04-data-manipulation/4-array.js

@@ -1,11 +1,28 @@
 // Reference: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array
 
-const myArray = Array(1, "a", () => "A");
+const array = Array(1, "a", () => "A", [], { name: "array" });
 
-console.log(myArray);
-console.log(myArray.length);
-console.log(myArray[2]());
-console.log(myArray.join("_"));
+console.log(array);
+console.log(array.length);
+console.log(array[1]);
+console.log(array[2]());
+console.log(array[4].name);
+
+console.log(array.join("_"));
+
+console.log(array.includes("a"));
+console.log("A" == "a");
+
+console.log(array.indexOf("A")); // -1 not exist
+const sliceNewArray = array.slice(1, -3); // new array
+console.log(sliceNewArray);
+console.log(array);
+
+const spliceNewArray = array.splice(-2, 2); // modify
+array.splice(1, 0, "insert");
+
+console.log(spliceNewArray);
+console.log(array);
 
 const myName = "Emanuel";
 
@@ -14,53 +31,69 @@ console.log(myName.split("").reverse().join(""));
 
 const techs = ["HTML", "CSS", "Git"];
 
+// LIFO
 techs.push("JavaScript");
 console.log(techs);
 
-techs.pop(); // LIFO
+techs.pop();
 console.log(techs);
 
 const removeElementEnd = techs.pop();
 console.log(`${removeElementEnd} foi removido do final!`);
 
+// FIFO
 techs.unshift("SQL");
 console.log(techs);
 
-techs.shift(); // FIFO
+techs.shift();
 console.log(techs);
 
 const removeElementStart = techs.shift();
 console.log(`${removeElementStart} foi removido do início!`);
+console.log(techs);
 
-techs.push("React");
-techs.push("Node.js");
+//destructure
+const letters = ["A", "B", "C"];
+const [item1, item2, ...rest] = letters;
+console.log(item1);
+console.log(item2);
+console.log(rest);
+console.log(...rest);
 
-console.log(techs);
-console.log(techs.includes("React"));
-console.log("A" == "a");
+// rest
+function showArray(array, ...itens) {
+  console.log(array);
+  console.log(itens);
+}
 
-let index = techs.indexOf("Node.js"); // -1 not exist
-console.log(index);
+showArray(letters, "D", "E", "F");
 
-const indexSlice = techs.slice(1, -1);
-console.log(indexSlice);
+// spread
+const numbers = [1, 3, 42, 5, 87, 6];
+console.log(numbers);
+console.log(...numbers);
+console.log(Math.max(...numbers));
 
-const arrayLetters = ["A", "B", "C", "D", "E", "F"];
+// value
+let num1 = 1;
+let num2 = num1;
 
-const sliceNewArray = arrayLetters.slice(1, -3); // new array
-console.log(sliceNewArray);
-console.log(arrayLetters);
+num1++;
+num2--;
 
-const spliceNewArray = arrayLetters.splice(-2, 2); // modify
+console.log({ num1, num2 });
 
-arrayLetters.splice(1, 0, "insert");
+// reference
+const numbers1 = [1, 2, 3];
+const numbers2 = numbers1;
 
-console.log(spliceNewArray);
-console.log(arrayLetters);
+const clone = [...numbers1]; // spread
+// const [...clone] = numbers1; // rest
 
-techs.splice(techs.indexOf("CSS"), 1);
-techs.splice(1, 2, "Chat GPT", "Inglês");
-console.log(techs);
+numbers1.pop();
+
+console.log({ numbers1, numbers2 });
+console.log(clone);
 
-console.log(arrayLetters + techs);
-console.log(arrayLetters.concat(techs));
+console.log(letters + techs);
+console.log(letters.concat(techs));

5-JavaScript/class-04-data-manipulation/challenges/5-delete-array-element.js

@@ -8,5 +8,4 @@ function deleteArrayElement(element, array) {
   return array;
 }
 
-const newArray = deleteArrayElement("JavaScript", techs);
-document.write(newArray);
+console.log(deleteArrayElement("JavaScript", techs));