default parameter | Template Literals

Author: lgope

js-coding-technique/default-parameter.js

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+// Longhand:
+
+function volumeFunc(a, b, c) {
+  if (b === undefined) b = 3;
+  if (c === undefined) c = 4;
+  return a * b * c;
+}
+
+// Shorthand:
+
+volumeFunc = (a, b = 3, c = 4) => a * b * c;
+
+volumeFunc(2); //output: 24

js-coding-technique/template-literals.js

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+// Longhand:
+
+const welcomeMgs = 'You have logged in as ' + firstName + ' ' + lastName + '.';
+
+const dbLink = 'http://' + host + ':' + port + '/' + database;
+
+// Shorthand:
+
+const welcomeMgs = `You have logged in as ${firstName} ${lastName}`;
+
+const dbLink = `http://${host}:${port}/${database}`;
+
+let a = 9;
+let b = 10;
+console.log(`Nineteen is ${a + b} and
+not ${2 * a + b}.`);