chore: completes intro

Author: cesarnml

examples/hello-ts/package.json

@@ -19,5 +19,9 @@
     "build": "tsc src/index.ts --outDir lib --types node --module commonjs --target ES2017",
     "test": "echo 'No tests'"
   },
-  "devDependencies": {}
+  "devDependencies": {},
+  "dependencies": {
+    "eslint": "^6.7.1",
+    "global": "^4.4.0"
+  }
 }

examples/hello-ts/src/index.js

@@ -0,0 +1,23 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+/**
+ * Create a promise that resolves after some time
+ * @param n number of milliseconds before promise resolves
+ */
+function timeout(n) {
+    return new Promise(res => setTimeout(res, n));
+}
+/**
+ * Add two numbers
+ * @param a first number
+ * @param b second number
+ */
+async function addNumbers(a, b) {
+    await timeout(500);
+    return a + b;
+}
+exports.addNumbers = addNumbers;
+//== Run the program ==//
+(async () => {
+    console.log(await addNumbers(3, 4));
+})();

examples/hello-ts/src/index.ts

@@ -7,9 +7,9 @@ function timeout(n: number) {
 }
 
 /**
- * Add three numbers
+ * Add two numbers
  * @param a first number
- * @param b second
+ * @param b second number
  */
 export async function addNumbers(a: number, b: number) {
   await timeout(500);

examples/hello-ts/tsconfig.json

@@ -0,0 +1,8 @@
+{
+  "include": ["src"],
+  "compilerOptions": {
+    "target": "esnext",
+    "module": "commonjs",
+    "outDir": "lib"
+  }
+}

notes/1-basics.ts

@@ -3,22 +3,22 @@
 /**
  * (1) x is a string, b/c we’ve initialized it
  */
-// let x = "hello world";
+let x = "hello world";
 
 /**
  * (2) reassignment is fine
  */
-// x = "hello mars";
+x = "hello mars";
 
 /**
  * (3) but if we try to change type
  */
-// x = 42; // 🚨 ERROR
+x = "42"; // 🚨 ERROR
 
 /**
  * (4) let's look at const. The type is literally 'hello world'
  */
-// const y = "hello world";
+const y = 42;
 
 /**
  * This is called a 'string literal type'. y can never be reassigned since it's a const,

ts.code-workspace

@@ -68,6 +68,11 @@
     "code-runner.executorMap": {
       "javascript": "node",
       "typescript": "node_modules/.bin/ts-node"
+    },
+    "workbench.colorCustomizations": {
+      "activityBar.background": "#4F1F08",
+      "titleBar.activeBackground": "#6E2C0B",
+      "titleBar.activeForeground": "#FEF9F7"
     }
   },
   "extensions": {

tsconfig.json

@@ -6,7 +6,7 @@
     "strictFunctionTypes": true,
     "strictBindCallApply": true,
     "noUnusedLocals": false,
-    "noUnusedParameters": false
+    "noUnusedParameters": false,
   },
   "include": ["examples/*/src", "challenges/*/src", "notes"]
-}
+}

yarn.lock

@@ -2640,6 +2640,11 @@ doctrine@^3.0.0:
   dependencies:
     esutils "^2.0.2"
 
+dom-walk@^0.1.0:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/dom-walk/-/dom-walk-0.1.1.tgz#672226dc74c8f799ad35307df936aba11acd6018"
+  integrity sha1-ZyIm3HTI95mtNTB9+TaroRrNYBg=
+
 dot-prop@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/dot-prop/-/dot-prop-3.0.0.tgz#1b708af094a49c9a0e7dbcad790aba539dac1177"
@@ -2897,6 +2902,49 @@ eslint@6.7.0:
     text-table "^0.2.0"
     v8-compile-cache "^2.0.3"
 
+eslint@^6.7.1:
+  version "6.7.1"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-6.7.1.tgz#269ccccec3ef60ab32358a44d147ac209154b919"
+  integrity sha512-UWzBS79pNcsDSxgxbdjkmzn/B6BhsXMfUaOHnNwyE8nD+Q6pyT96ow2MccVayUTV4yMid4qLhMiQaywctRkBLA==
+  dependencies:
+    "@babel/code-frame" "^7.0.0"
+    ajv "^6.10.0"
+    chalk "^2.1.0"
+    cross-spawn "^6.0.5"
+    debug "^4.0.1"
+    doctrine "^3.0.0"
+    eslint-scope "^5.0.0"
+    eslint-utils "^1.4.3"
+    eslint-visitor-keys "^1.1.0"
+    espree "^6.1.2"
+    esquery "^1.0.1"
+    esutils "^2.0.2"
+    file-entry-cache "^5.0.1"
+    functional-red-black-tree "^1.0.1"
+    glob-parent "^5.0.0"
+    globals "^12.1.0"
+    ignore "^4.0.6"
+    import-fresh "^3.0.0"
+    imurmurhash "^0.1.4"
+    inquirer "^7.0.0"
+    is-glob "^4.0.0"
+    js-yaml "^3.13.1"
+    json-stable-stringify-without-jsonify "^1.0.1"
+    levn "^0.3.0"
+    lodash "^4.17.14"
+    minimatch "^3.0.4"
+    mkdirp "^0.5.1"
+    natural-compare "^1.4.0"
+    optionator "^0.8.3"
+    progress "^2.0.0"
+    regexpp "^2.0.1"
+    semver "^6.1.2"
+    strip-ansi "^5.2.0"
+    strip-json-comments "^3.0.1"
+    table "^5.2.3"
+    text-table "^0.2.0"
+    v8-compile-cache "^2.0.3"
+
 espree@^6.1.2:
   version "6.1.2"
   resolved "https://registry.yarnpkg.com/espree/-/espree-6.1.2.tgz#6c272650932b4f91c3714e5e7b5f5e2ecf47262d"
@@ -3560,6 +3608,14 @@ global-dirs@^0.1.0, global-dirs@^0.1.1:
   dependencies:
     ini "^1.3.4"
 
+global@^4.4.0:
+  version "4.4.0"
+  resolved "https://registry.yarnpkg.com/global/-/global-4.4.0.tgz#3e7b105179006a323ed71aafca3e9c57a5cc6406"
+  integrity sha512-wv/LAoHdRE3BeTGz53FAamhGlPLhlssK45usmGFThIi4XqnBmjKQ16u+RNbP7WvigRZDxUsM0J3gcQ5yicaL0w==
+  dependencies:
+    min-document "^2.19.0"
+    process "^0.11.10"
+
 globals@^12.1.0:
   version "12.3.0"
   resolved "https://registry.yarnpkg.com/globals/-/globals-12.3.0.tgz#1e564ee5c4dded2ab098b0f88f24702a3c56be13"
@@ -5088,6 +5144,13 @@ mimic-fn@^2.0.0, mimic-fn@^2.1.0:
   resolved "https://registry.yarnpkg.com/mimic-fn/-/mimic-fn-2.1.0.tgz#7ed2c2ccccaf84d3ffcb7a69b57711fc2083401b"
   integrity sha512-OqbOk5oEQeAZ8WXWydlu9HJjz9WVdEIvamMCcXmuqUYjTknH/sqsWvhQ3vgwKFRR1HpjvNBKQ37nbJgYzGqGcg==
 
+min-document@^2.19.0:
+  version "2.19.0"
+  resolved "https://registry.yarnpkg.com/min-document/-/min-document-2.19.0.tgz#7bd282e3f5842ed295bb748cdd9f1ffa2c824685"
+  integrity sha1-e9KC4/WELtKVu3SM3Z8f+iyCRoU=
+  dependencies:
+    dom-walk "^0.1.0"
+
 minimatch@3.0.4, minimatch@^3.0.4:
   version "3.0.4"
   resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.4.tgz#5166e286457f03306064be5497e8dbb0c3d32083"
@@ -6212,6 +6275,11 @@ process-nextick-args@~2.0.0:
   resolved "https://registry.yarnpkg.com/process-nextick-args/-/process-nextick-args-2.0.1.tgz#7820d9b16120cc55ca9ae7792680ae7dba6d7fe2"
   integrity sha512-3ouUOpQhtgrbOa17J7+uxOTpITYWaGP7/AhoR3+A+/1e9skrzelGi/dXzEYyvbxubEF6Wn2ypscTKiKJFFn1ag==
 
+process@^0.11.10:
+  version "0.11.10"
+  resolved "https://registry.yarnpkg.com/process/-/process-0.11.10.tgz#7332300e840161bda3e69a1d1d91a7d4bc16f182"
+  integrity sha1-czIwDoQBYb2j5podHZGn1LwW8YI=
+
 progress@^2.0.0:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/progress/-/progress-2.0.3.tgz#7e8cf8d8f5b8f239c1bc68beb4eb78567d572ef8"