Shorthand coding technique.. 🗽🚀

Author: lgope

js-coding-technique/for-loop.js

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+// Longhand:
+
+const fruits = ['banana', 'mango', 'avocado', 'apple'];
+for (let i = 0; i < fruits.length; i++) {
+  // something
+}
+
+// Shorthand:
+
+for (let fruit of fruits) {
+  // something
+}
+
+// to access just the index
+// for (let index in fruits)
+
+// example 1
+const obj = { continent: 'Asia', country: 'Bangladesh', city: 'Dhaka' };
+for (let key in obj) console.log(key); // output: continent, country, city
+
+// Shorthand for Array.forEach:
+function consoleArrayElements(element, index, array) {
+  console.log(`arr[ ${index} ] = ${element}`);
+}
+
+let arr = [2, 4, 5, 8, 9];
+arr.forEach(consoleArrayElements);
+// arr[0] = 2
+// arr[0] = 4
+// arr[1] = 5
+// arr[1] = 8
+// arr[2] = 9

js-coding-technique/short-circuit-evaluation.js

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+// Longhand:
+
+let databaseHost;
+if (process.env.DB_HOST) {
+  databaseHost = process.env.DB_HOST;
+} else {
+  databaseHost = 'localhost';
+}
+
+// Shorthand:
+
+const databaseHost = process.env.DB_HOST || 'localhost';