Small updates

chapter02/src/tagged_templates.js

@@ -0,0 +1,19 @@
+function showAge(strings, name, year) {
+    const currYear = new Date().getFullYear();
+    const yearsAgo = currYear - year;
+    return (
+        strings[0] + name + strings[1] + year + `, ${yearsAgo} years ago`
+    );
+}
+
+const who = "Prince Valiant";
+const when = 1937;
+const output1 = showAge`The ${who} character was created in ${when}.`;
+console.log(output1);
+// The Prince Valiant character was created in 1937, 81 years ago
+
+const model = "Suzuki";
+const yearBought = 2009;
+const output2 = showAge`My ${model} car was bought in ${yearBought}`;
+console.log(output2);
+// My Suzuki car was bought in 2009, 9 years ago

chapter12/package.json

@@ -7,25 +7,25 @@
         "@storybook/addon-links": "^3.4.11",
         "@storybook/cli": "^3.4.11",
         "@storybook/react-native": "^3.4.11",
-        "enzyme": "^3.6.0",
+        "enzyme": "^3.7.0",
-        "enzyme-adapter-react-16": "^1.5.0",
+        "enzyme-adapter-react-16": "^1.7.0",
-        "eslint": "^5.6.0",
+        "eslint": "^5.9.0",
-        "eslint-config-recommended": "^3.0.0",
+        "eslint-config-recommended": "^3.0.2",
-        "eslint-plugin-babel": "^5.2.0",
+        "eslint-plugin-babel": "^5.3.0",
-        "eslint-plugin-flowtype": "^2.50.1",
+        "eslint-plugin-flowtype": "^2.50.3",
         "eslint-plugin-react": "^7.11.1",
-        "eslint-plugin-react-native": "^3.3.0",
+        "eslint-plugin-react-native": "^3.5.0",
         "flow": "^0.2.3",
         "flow-bin": "^0.81.0",
         "flow-coverage-report": "^0.6.0",
         "flow-typed": "^2.5.1",
         "jest-expo": "~27.0.0",
-        "prettier": "^1.14.3",
+        "prettier": "^1.15.2",
         "react-addons-test-utils": "^15.6.2",
-        "react-devtools": "^3.4.0",
+        "react-devtools": "^3.4.3",
         "react-native-scripts": "1.14.0",
         "react-native-storybook-loader": "^1.8.0",
-        "react-test-renderer": "^16.5.2",
+        "react-test-renderer": "^16.6.3",
         "reactotron-react-native": "^2.1.0",
         "reactotron-redux": "^2.1.0",
         "redux-devtools-extension": "^2.13.5"
@@ -59,11 +59,11 @@
         "axios": "^0.18.0",
         "expo": "^27.0.1",
         "prop-types": "^15.6.2",
-        "react": "^16.5.2",
+        "react": "^16.6.3",
-        "react-dom": "^16.5.2",
+        "react-dom": "^16.6.3",
         "react-native": "~0.55.2",
-        "react-navigation": "^2.16.0",
+        "react-navigation": "^2.18.2",
-        "react-redux": "^5.0.7",
+        "react-redux": "^5.1.1",
         "redux-mock-store": "^1.5.3",
         "redux-thunk": "^2.3.0",
         "whatwg-fetch": "^2.0.4"