thoni_r ex. 1-7

.gitignore

@@ -30,3 +30,5 @@ bower_components
 
 # secret results ;-)
 browser/lessons/xxx
+
+/.idea

browser/lessons/lesson_01-base/lexical-analyzer.js

@@ -9,7 +9,7 @@
  * @return {Array}
  */
 export function tokenize(str) {
-  // Write code here so that it passes the tests
+  return str.trim().replace(/ +/g, " ").split(" ");
 }
 
 /** stem a string = turn several variants into the same
@@ -19,7 +19,7 @@ export function tokenize(str) {
  * @return {String}
  */
 export function stem(str) {
-  // Write code here so that it passes the tests
+  return str.toLowerCase();
 }
 
 /** parse a string into a list of stemmed token
@@ -29,7 +29,7 @@ export function stem(str) {
  * @return {Array}
  */
 export function parse(str) {
-  // Write code here so that it passes the tests
+  return tokenize(stem(str));
 }
 
 /** index a string into a hash {'token' : <frequency of appearance>}
@@ -38,7 +38,17 @@ export function parse(str) {
  * @return {Object}
  */
 export function index(str) {
-  // Write code here so that it passes the tests
+    var obj = {};
+    parse(str).forEach(function(token)
+    {
+        if (obj[token]) {
+            ++obj[token];
+        }
+        else {
+            obj[token] = 1;
+        }
+    });
+    return obj;
 }
 
 

browser/lessons/lesson_02-chrome-dev-tools/spec.js

@@ -89,7 +89,7 @@ context('[Lesson 2]', function () {
       // what ????
       // TODO understand
 
-      let copy = ( object ); // TODO change this line to use the cloneDeep() function
+      let copy = cloneDeep( object ); // TODO change this line to use the cloneDeep() function
       object.foo.bar = 33;
 
       expect(object).to.have.deep.property('foo.bar', 33);

browser/lessons/lesson_03-type_detection/boolean-converter.js

@@ -4,7 +4,16 @@
  * @return {Boolean}
  */
 export default function convertToBoolean(value) {
-  // TODO write the function so it passes the tests below !
+  if (typeof value === 'boolean') {
+    return value;
+  }
+  if (value instanceof Boolean) {
+    return value == true;
+  }
+  if (typeof value === 'number') {
+    return value == 1;
+  }
+  return value == "true";
 }
 
 

browser/lessons/lesson_03-type_detection/boolean-converter.spec.js

@@ -67,7 +67,7 @@ context('[Lesson 3]', function () {
     });
 
     // Too hard ;-) but bonus points if you do it
-    it.skip('should be able to do a correct conversion to boolean (round 4)', function () {
+    it('should be able to do a correct conversion to boolean (round 4)', function () {
       const TEST_CASES = [
         {
           input: 0,

browser/lessons/lesson_04-logger/logger.js

@@ -1,22 +1,42 @@
 import _ from 'lodash';
 
 function createFancyLogger(id) {
-  id = (id || 'default').toUpperCase();
-
-  function logBetter(level) {
-    const originalArgs = Array.from(arguments);
-
-    // TODO implement !
-    let newArgs = originalArgs;
-    // TODO....
+  if (id) {
+    id = id.toUpperCase();
+  }
+  else {
+    id = "default";
   }
 
   /* eslint-disable no-undefined */
   return {
-    log: undefined,
-    info: undefined,
-    warn: undefined,
-    error: undefined,
+    log: function(arg)
+    {
+      const originalArgs = Array.from(arguments);
+
+      let newArgs = originalArgs;
+      newArgs[0] = getTimestamp() + " - " + id + " - ";
+      if (typeof arg === 'object') {
+        newArgs.push(arg);
+      }
+      else {
+        newArgs[0] += arg;
+      }
+
+      console.log.apply(console, newArgs);
+    },
+    info: function(arg)
+    {
+      console.info(getTimestamp() + " - " + id + " - " + arg);
+    },
+    warn: function(arg)
+    {
+      console.warn(getTimestamp() + " - " + id + " - " + arg);
+    },
+    error: function(arg)
+    {
+      console.error(getTimestamp() + " - " + id + " - " + arg);
+    }
   };
 }
 

browser/lessons/lesson_05-timeouts/debounce.js

@@ -1,8 +1,17 @@
 
 export default function debounce(callback, waitMs) {
 
+  var id = null;
+
   return function() {
-    // ...
+    var args = arguments;
+    if (id) {
+      clearTimeout(id)
+    }
+    id = setTimeout(function()
+    {
+      callback.apply(window, args);
+    }, waitMs);
   };
 }
 

browser/lessons/lesson_06-wrapping_up/index.js

@@ -27,7 +27,10 @@ function updateResults() {
 
   let index = LexicalAnalyser.index(text);
 
-  let elements;
+  let elements = Object.keys(index).map(function(idx)
+  {
+      return '<tr><td>' + idx + '</td><td>' + index[idx] + '</td></tr>';
+  });
   /* TODO
    elements = [
      '<tr><td>Hello</td><td>2</td></tr>',

browser/lessons/lesson_07-async-callback/find-agency.js

@@ -4,8 +4,20 @@ import tryUntil from './try-until';
 
 export default function findAgency (DB, image, cb) {
   tryUntil([
-    // TODO find by agencyName
-    // TODO find by credit
-    // TODO fallback to 'Unknown'
+      // TODO find by agencyName
+      function(cb)
+      {
+          DB.findAgency({name: image.agencyName}, cb);
+      },
+      // TODO find by credit
+      function(cb)
+      {
+        DB.findAgency({name: image.credit}, cb);
+      },
+      // TODO fallback to 'Unknown'
+      function(cb)
+      {
+        DB.findAgency({name: 'Unknown'}, cb);
+      }
   ], cb);
 }

browser/lessons/lesson_07-async-callback/try-until.js

@@ -1,4 +1,23 @@
 
 export default function tryUntil(candidateFnArray, callback) {
   /* ... */
+    var i = 0;
+    function test()
+    {
+        candidateFnArray[i](function(err, res)
+        {
+            if (err || res) {
+                callback(err, res);
+            }
+            else {
+                if (++i < candidateFnArray.length) {
+                    test();
+                }
+                else {
+                    callback(null, null);
+                }
+            }
+        })
+    }
+    test();
 }