Merge branch 'master' of https://github.com/lgope/JavaScript

Author: lgope

05 - Objects-And-Functions/recursiveFunction.js

@@ -43,3 +43,14 @@ var factorial = function (number) {
 };
 
 console.log(`Factorial = ${factorial(9)}`);
+
+
+// Function 
+function countDown(number) {
+    if (number !== 0) countDown.count += number + countDown(number - 1);
+    return countDown.count;
+}
+
+countDown.count = 0;
+console.log(countDown(4));
+

05 - Objects-And-Functions/searchAnyValue.js

@@ -0,0 +1,22 @@
+const arr = [{
+  name: 'xyz',
+  grade: 'xs'
+}, {
+  name: 'yaya',
+  grade: 'xa'
+}, {
+  name: 'xf',
+  frade: 'dd'
+}, {
+  name: 'a',
+  grade: 'b'
+}];
+
+
+function filterIt(arr, searchKey) {
+  return arr.filter(obj => Object.keys(obj).some(key => obj[key].includes(searchKey)));
+}
+
+console.log("find 'x'", filterIt(arr,"x"));
+console.log("find 'a'", filterIt(arr,"a"));
+console.log("find 'z'", filterIt(arr,"z"));

Array/removeDuplicates.js

@@ -0,0 +1,13 @@
+const fruits = ['🥑', '🍊', '🍇', '🍏', '🍎', '🍑', '🍑'];
+
+// way 1
+console.log('way 1 ', fruits.reduce((uniqueArray, fruit) => {
+  uniqueArray.indexOf(fruit) === -1 && uniqueArray.push(fruit);
+  return uniqueArray;
+}, []))
+
+// way 2
+console.log('way 2 ', fruits.filter((fruit, index) => fruits.indexOf(fruit) === index))
+
+// way 3
+console.log('way 3 ', [...new Set(fruits)])

Asynchronous-JavaScript/Asynchronous-Example/package-lock.json

@@ -17,6 +17,6 @@
   },
   "homepage": "https://github.com/Lakshmangope/node.js#readme",
   "dependencies": {
-    "superagent": "^5.1.0"
+    "superagent": "^5.3.1"
   }
 }

Asynchronous-JavaScript/Asynchronous-Example/package.json

@@ -44,3 +44,23 @@ exports.createOne = Model =>
       },
     });
   });
+
+// another
+
+const awaitHandlerFactory = (middleware) => {
+  return async (req, res, next) => {
+    try {
+      await middleware(req, res, next);
+    } catch (err) {
+      next(err);
+    }
+  };
+};
+// and use it this way:
+app.get(
+  "/",
+  awaitHandlerFactory(async (request, response) => {
+    const result = await getContent();
+    response.send(result);
+  })
+);

Asynchronous-JavaScript/byeTryCatchErrorHandling.js

@@ -0,0 +1,10 @@
+const fixNum = (num, n = 2) => Number.parseFloat(num).toFixed(n);
+
+console.log(fixNum(123.456));
+// expected output: "123.46"
+
+console.log(fixNum(0.004));
+// expected output: "0.00"
+
+console.log(fixNum('1.23e+5', 4));
+// expected output: "123000.0000"