Basics Completed

Author: LMithilesh-26

04_Functions/09_High_Order_Loops.js

@@ -0,0 +1,73 @@
+// for of
+
+const arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+for (const i of arr) {
+    console.log(i);
+}
+
+// Maps
+
+const map = new Map()
+map.set('IN', 1)
+map.set('USA', 2)
+map.set('FR', 3)
+
+console.log(map);
+for (const [key, values] of map) {
+    console.log(values);
+}
+
+// for in 
+
+const myObj = {
+    js: "Javascript",
+    cpp: "C++",
+    py: "Python",
+    rb: "Ruby"
+}
+
+for (const key in myObj) {
+    console.log(key);
+    console.log(myObj[key]);
+}
+
+for (const key in arr) {
+    console.log(key); // print keys 
+    console.log(arr[key]); // prints arr values using keys
+}
+
+for (const key in map) {
+    console.log(key);
+}
+
+// for each
+
+arr.forEach(function (item){
+    console.log(item);
+})
+arr.forEach(element => {
+    console.log(element);
+});
+
+arr.forEach((item, index, arr) => {
+    console.log(item, index, arr);
+})
+
+const myCoding = [
+    {
+        languageName: "Javascript",
+        languageFileName: ".js"
+    },
+    {
+        languageName: "Java",
+        languageFileName: ".java"
+    },
+    {
+        languageName: "Python",
+        languageFileName: ".py"
+    }
+]
+
+myCoding.forEach((item) => {
+    console.log(item.languageName, item.languageFileName);
+})

04_Functions/10_Filter_Map_Reduce.js

@@ -0,0 +1,53 @@
+const coding = ["C++", "JS", "JAVA", "Python", "Ruby"]
+
+coding.forEach((item) => {
+    console.log(item);
+})
+
+const myNums = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+
+let newNums = myNums.filter((item) => item > 5)
+console.log(newNums);
+
+newNums = myNums.filter((item) => {
+    if(item % 2 == 0) return item 
+})
+console.log(newNums);
+
+const books = [
+    { title: 'Book One', genre: 'Fiction', publish: 1981, edition: 2004 },
+    { title: 'Book Two', genre: 'Non-Fiction', publish: 1992, edition: 2008 },
+    { title: 'Book Three', genre: 'History', publish: 1999, edition: 2007 },
+    { title: 'Book Four', genre: 'Non-Fiction', publish: 1989, edition: 2010 },
+    { title: 'Book Five', genre: 'Science', publish: 2009, edition: 2014 },
+    { title: 'Book Six', genre: 'Fiction', publish: 1987, edition: 2010 },
+    { title: 'Book Seven', genre: 'History', publish: 1986, edition: 1996 },
+    { title: 'Book Eight', genre: 'Science', publish: 2011, edition: 2016 },
+    { title: 'Book Nine', genre: 'Non-Fiction', publish: 1981, edition: 1989 },
+];
+
+const userBooks = books.filter((bk) => bk.genre === "History")
+console.log(userBooks);
+
+// map
+
+newNums = myNums.map((item) => item + 10)
+console.log(newNums);
+
+newNums = myNums.map((item) => item * 10).map((item) => item + 10)
+console.log(newNums);
+
+newNums = myNums
+                .map((item) => item * 10)
+                .map((item) => item + 10)
+                .filter((item) => item >= 50)
+console.log(newNums);
+
+const arr = [1, 2, 3]
+
+const initialValue = arr.reduce(function(acc, currVal) {
+    console.log(`Acc: ${acc}, CurrVal: ${currVal}`);
+    return acc + currVal
+}, 0)
+
+console.log(initialValue);