Run format.mjs

Author: jagdish-15

concepts/callbacks/about.md

@@ -81,6 +81,7 @@ You see this pattern often when dealing with asynchronous functions to assist wi
 Common `Array` functions use callback functions to define their behaviour:
 
 - `Array.prototype.forEach`:
+
   - Accepts a callback, which applies the callback to each element of an array.
 
     ```javascript
@@ -91,6 +92,7 @@ Common `Array` functions use callback functions to define their behaviour:
     ```
 
 - `Array.prototype.map`
+
   - Accepts a callback, which applies the callback to each element of an array using the result to create a new array.
 
     ```javascript
@@ -101,6 +103,7 @@ Common `Array` functions use callback functions to define their behaviour:
     ```
 
 - `Array.prototype.reduce`
+
   - Accepts a callback, which applies the callback to each element of an array, passing the result forward to the next invocation.
 
     ```javascript

concepts/closures/about.md

@@ -18,6 +18,7 @@ The name _closure_ is historically derived from [_λ-calculus_][wiki-lambda-calc
 ## Reasons to use closures in JavaScript
 
 1. Data Privacy / Data Encapsulation
+
    - Unlike other languages, in 2020, there was no way to specify _private_ variables. So closures can be used to effectively emulate _private_ variables (there was a proposal to introduce private variable notation, which might have become standard by the time you read this).
 
    ```javascript
@@ -36,6 +37,7 @@ The name _closure_ is historically derived from [_λ-calculus_][wiki-lambda-calc
    ```
 
 2. Partial Application
+
    - Functions may return functions, and when a returned function uses the argument of the function that created it, this is an example of using a closure to perform partial application. Sometimes this is called _currying_ a function.
 
    ```javascript

exercises/concept/amusement-park/.meta/design.md

@@ -32,22 +32,26 @@ This exercise could benefit from the following rules in the [analyzer][analyzer]
 The comment types mentioned below only serve as a proposal.
 
 1. `createVisitor`
+
    - `actionable`: If the student used a helper variable, give feedback that the result can be returned directly.
    - `celebratory`: If the student used classes, celebrate but let them know it is not necessary throughout this exercise.
    - `informative`: If the student did not use the short-hand notation but wrote `name: name` etc instead, let them know how to shorten that.
      The solution should be accepted nevertheless.
 
 2. `revokeTicket`
+
    - `essential`: Check the ticketId field is not deleted and re-added.
    - `celebratory`: If they used a method on a visitor class, celebrate but let them know it is not necessary for this exercise.
 
 3. `ticketStatus`
+
    - `essential`: Using a type switch should be discouraged since it is confusing to read because of the `typeof null === 'object'` quirk.
    - `informative`: If the student did not use early returns, maybe let them know about this alternative.
    - `celebratory`: Congratulate if the student used a template string for the "sold" case
    - `celebratory`: Congratulate if the student used a `value` helper variable.
 
 4. `simpleTicketStatus`
+
    - `essential`: Check `??` was used and not an if-statement or something else.
    - `actionable`: If the student used a helper variable, give feedback that the result can be returned directly.
 

exercises/concept/bird-watcher/.meta/design.md

@@ -36,12 +36,14 @@ This exercise could benefit from the following rules in the [analyzer][analyzer]
 For all tasks check that the student actually used a for loop.
 
 1. `totalBirdCount`
+
    - Verify that the condition is written with `< x.length` instead of `<= y.length -1`.
    - Check whether a shorthand assignment `+=` was used to increase the sum (non-essential feedback).
    - Verify the total was properly initialized with `0` instead of e.g. `null`
    - Verify the increment operator was used in loop header step
 
 2. `birdsInWeek`
+
    - Verify a helper variable was used instead of duplicating the calculation in the initialization and condition of the loop
    - Other checks should be the same as for `totalBirdCount`
 

exercises/concept/high-score-board/.meta/design.md

@@ -40,22 +40,27 @@ The Concepts this exercise unlocks are:
 This exercise could benefit from the following rules in the [analyzer][analyzer]:
 
 1. `createScoreBoard`
+
    - `essential`: Make sure no class, map etc. was created, there should be just an object.
    - `actionable`: If the student created an empty object first and then added the value, give feedback to include the entry in the object literal directly.
    - `actionable`: Check that the object was returned directly, no intermediate assignment to a variable necessary.
 
 2. `addPlayer`
+
    - `essential`: Check the assignment operator was used and no additional variables were declared.
 
 3. `removePlayer`
+
    - `essential`: Make sure `delete` was used and not set to undefined or null.
    - `actionable`: If there is additional code to check whether the key is present before deleting it, give feedback that this is not necessary.
 
 4. `updateScore`
+
    - `actionable`: If the student used a separate variable to calculate the new value first, tell them it is not necessary.
    - `actionable`: If the student did not use the shorthand assignment operator, tell them about it. If they used it already, give a `celebratory` comment.
 
 5. `applyMondayBonus`
+
    - `essential`: Check the student actually used `for...in`.
    - Same feedback as in `updateScore` applies.
    - Using `updateScore` in the solution should be treated as equally correct as the exemplar solution.

exercises/concept/mixed-juices/.meta/design.md

@@ -38,6 +38,7 @@ This exercise could benefit from the following rules in the [analyzer][analyzer]
 The comment types mentioned below only serve as a proposal.
 
 1. `timeToMixJuice`
+
    - `essential`: Verify the student used a switch statement.
      Would be nice if we could give different feedback depending on what the student used instead.
      If it was if-else, comment that switch is better suited for so many different variants.
@@ -52,6 +53,7 @@ The comment types mentioned below only serve as a proposal.
      ```
 
 2. `limesToCut`
+
    - A solution that uses `if (limes.length < 0) break;` instead of combining the conditions should be considered equally correct to the exemplar solution.
      The version in the exemplar file is shorter but the break version emphasizes that there is a special edge case.
    - `essential`: Verify that `while` was used.

exercises/concept/ozans-playlist/.meta/design.md

@@ -35,6 +35,7 @@ This exercise could benefit from the following rules in the [analyzer][analyzer]
 For all tasks, verify that the student actually used a `Set`.
 
 1. `addTrack`
+
    - Verify that there was no redundant `Set.has()` call
 
 2. `deleteTrack`