Updates from todays ClojureBridge London workshop

Author: practicalli-johnny

SUMMARY.md

@@ -63,7 +63,8 @@
         * [Named or anonymous functions](functions/named-or-anonymous-functions.md)
         * [Calling anonymous functions](functions/calling-anonymous-functions.md)
         * [Arguments to functions](functions/arguments-to-functions.md)
-    * [Simplicity with Pure Functions](functions/pure-functions.md)
+    * [Excercise: are we there yet?](functions/exercise-are-we-there-yet.md)
+    * [Theory: Simplicity with Pure Functions](functions/pure-functions.md)
         * [Pure function examples](functions/pure-function-examples.md)
         * [Impure function examples](functions/impure-function-examples.md)
 * [Flow Control & Logic](flow-control-logic/index.md)

assignment/index.md

@@ -1,4 +1,4 @@
-# Assignment with `def`
+# Assigning names to values
 
 Rather than type the same values many times in our code, we can give them a name to refer to them. This is called assignment.
 

challenges-projects.md

@@ -4,9 +4,9 @@ Congratulations, you have made it through the basics of Clojure
 
 ![Congratulations - minions](/images/congratulations-minions.gif)
 
-If you have time for more, then you can either work on some more challenges
+If you have time for more, then you can either work on some more challenges...
 
 * [4Clojure challenges](http://www.4clojure.com/) - learn the many functions in Clojure and how they work
 * [Kata Challenges](kata-challenges/index.html) - test first approach to writing Clojure
 
-If you have lots of time, then try one of the projects
+Or if you have lots of time, then try one of the **[projects](additional-projects/)**

collections/reading-values-from-vectors-sequentially.md

@@ -17,6 +17,17 @@ You can also combine these functions, so the results of one function call can be
 ()
 ```
 
+<!--sec data-title="Reveal answer..." data-id="answer002" data-collapse=true ces-->
+
+```clojure
+
+(first (second ["Birthdays are" "full of" "presents" "that you" "always dreamd" "of having"]))
+
+```
+
+<!--endsec-->
+
+
 ------------------------------------------
 
 > #### Hint::

functions/name-smash.md

@@ -34,6 +34,21 @@ Take your name and the name of another student in the group and create a combine
 ;;
 ;; => ["Ada" "Lovelace" "Anne-Marie" "Imafidon"]
 ```
+
+In JavaScript the above gives a rather messy output of nested collections.
+
+Mapping over the student collection gives cleaner return value
+
+```clojure
+(map #(clojure.string/split % #" ") students)
+```
+
+We can also flatten the result to make it look nicer
+
+```clojure
+(flatten (map #(clojure.string/split % #" ") students))
+```
+
 <!--endsec-->
 
 

simple-values/arithmetic.md

@@ -28,3 +28,10 @@ Look at these examples of Clojure code and their equivalent math expression:
 ```eval-clojure
 (* 22/7 7)
 ```
+
+------------------------------------------
+
+> #### Info::
+> Ratio types are not supported in the web browser REPL above, however, they will work in your editor
+>
+> Unfortunately JavaScript does not have anyway to support the Clojure ratio type.

simple-values/exercise-calculating-language-ages.md

@@ -37,14 +37,51 @@ As there are two values the same, we could also calculate the total as follows
 
 
 > #### Note::Average age of programming languages
-> Calculate the average age of the 8 programming languages
+> Calculate the average age of the 10 programming languages
 ```eval-clojure
 ()
 ```
 
+------------------------------------------
+
+> #### Hint::Counting values
+> You can simply divide the total age of all languages by 10.
+>
+> If you want to try something more advanced, then you can count the number of languages is to put them in a collection, eg.
+> `[10 27  26  21 22 22 45 34 59 60]`
+i>
+> The `count` function will tell you how many things are in a collection
+
+
+<!--sec data-title="Reveal answer..." data-id="answer002" data-collapse=true ces-->
+
+We first add up the ages of all the language ages.  Then we divide that total age with the number of languages
+
+```clojure
+(/ (+ 10 27 26  21 22 22 45 34 59 60) 10)
+```
+
+In a more advance clojure way we can also do
+
+```clojure
+(/ (+ 10 27 26  21 22 22 45 34 59 60)
+   (count [10 27 26  21 22 22 45 34 59 60]))
+```
+
+<!--endsec-->
+
+
 ------------------------------------------
 
 > #### Note::Find the age of the youngest programming language
 ```eval-clojure
 ()
 ```
+
+<!--sec data-title="Reveal answer..." data-id="answer003" data-collapse=true ces-->
+
+```clojure
+(first (sort [10 27  26  21 22 22 45 34 59 60]))
+```
+
+<!--endsec-->

simple-values/strings.md

@@ -16,13 +16,13 @@ In the last example a backslash, `\`, is used to allow us to put special charact
 
 ## Working with strings
 
-There are many functions that work with strings
+There are many functions that work with strings, especially in the `clojure.string` library
 
-* [str](https://clojuredocs.org/clojure.core/str) - join values into a string
-* [split](https://clojuredocs.org/clojure.string/split) - split a string based on a pattern (regex)
-* [subs](https://clojuredocs.org/clojure.core/subs) - get part of a string
-* [replace](https://clojuredocs.org/clojure.string/replace) - replace part of the string based on a pattern (regex)
-* [includes?](https://clojuredocs.org/clojure.string/includes_q) - does a string include another string (true or false)
+* [clojure.string/str](https://clojuredocs.org/clojure.core/str) - join values into a string
+* [clojure.string/split](https://clojuredocs.org/clojure.string/split) - split a string based on a pattern (regex)
+* [clojure.string/subs](https://clojuredocs.org/clojure.core/subs) - get part of a string
+* [clojure.string/replace](https://clojuredocs.org/clojure.string/replace) - replace part of the string based on a pattern (regex)
+* [clojure.string/includes?](https://clojuredocs.org/clojure.string/includes_q) - does a string include another string (true or false)
 
 
 > #### Note::Create a String of favourite colours
@@ -31,6 +31,19 @@ There are many functions that work with strings
 ()
 ```
 
+<!--sec data-title="Reveal answer..." data-id="answer001" data-collapse=true ces-->
+
+```clojure
+;; Just simply use a string
+"I love purple"
+
+;; Using a function you can create a string and join values to create a string
+(str "I love the colour " "purple")
+```
+
+<!--endsec-->
+
+
 ------------------------------------------
 
 > #### Note::Does the string contain your favorite colour
@@ -41,6 +54,15 @@ There are many functions that work with strings
 ()
 ```
 
+
+<!--sec data-title="Reveal answer..." data-id="answer002" data-collapse=true ces-->
+
+```clojure
+(clojure.string/includes? "Richard of York gave brown bread in vans" "brown")
+```
+<!--endsec-->
+
+
 ------------------------------------------
 
 > #### Hint::