Finish up episode 7

docs/videos.org

@@ -310,7 +310,8 @@ digraph {
   (cdr x9)
 #+END_SRC
 
-* Episode 6 - Property & Association Lists
+* DONE Episode 6 - Property & Association Lists
+CLOSED: [2022-06-13 Mon 10:38]
 ** I have an idea
 - Develop *FG42* on stream
 - I'll announce the date and time on:
@@ -413,3 +414,78 @@ digraph {
 - https://www.gnu.org/software/emacs/manual/html_node/elisp/Association-Lists.html
 - https://www.gnu.org/software/emacs/manual/html_node/elisp/Plist-Access.html
 - https://www.gnu.org/software/emacs/manual/html_node/elisp/Plists-and-Alists.html
+
+* Episode 7 - Basic Loops
+** About previous episode
+- Duplicate keys in an association list
+- ~eval-defun~
+** While
+- Form:
+#+BEGIN_SRC emacs-lisp
+  (while CONDITION
+    ...body...)
+#+END_SRC
+- Loops and evaluates ~body~ as long as the ~CONDITION~ evaluates to true.
+- It always evaluats to the value of the ~CONDITION~ which will be false aaaaall the time.
+- We need to explicitly manage the condition.
+- Example:
+#+BEGIN_SRC emacs-lisp
+  (let ((foo 1))
+    (while (< foo 10)
+      (message ">> %s" foo)
+      (setq foo (+ 1 foo))))
+
+  (let ((foo '(bar baz)))
+    (while foo
+      (message ">> %s" (car foo))
+      (setq foo (cdr foo))))
+#+END_SRC
+
+** dolist
+- It's a macro
+- Form:
+#+BEGIN_SRC emacs-lisp
+  (dolist (element list [result])
+    ...body...)
+#+END_SRC
+
+- Evaluates the ~body~ with ~element~ set to the CAR of ~list~ on each iteration
+- At the ends evaluates ~result~ and return the evaluation result (if ~result~ is provided)
+- Example:
+#+BEGIN_SRC emacs-lisp
+  (let ((foo '(9 8 7 6 5 4)))
+    (dolist (x foo (+ 10 1))
+      (message ">> %s" x)))
+
+
+  (let ((foo '(9 8 7 6 5 4)))
+    (macroexpand-1
+     '(dolist (x foo 10)
+        (message ">> %s" x))))
+#+END_SRC
+
+** dotimes
+- It's a macro too
+- Form:
+#+BEGIN_SRC emacs-lisp
+  (dotimes (var number)
+    ...body...)
+#+END_SRC
+- It's similar to ~dolist~ but iterates ~number~ of times
+- ~var~ in will contains the number of current iteration
+- Example:
+#+BEGIN_SRC emacs-lisp
+  (let ((foo 10))
+    (dotimes (x foo)
+      (message ">> %s" x)))
+
+
+  (let ((foo 10))
+    (macroexpand-1
+     '(dotimes (x foo)
+        (message ">> %s" x))))
+#+END_SRC
+
+* Episode 8 - More Loops
+** Recursion
+** Functional style loops