feat(15-diffs): Start section on diffs

Author: Ady-Gould

.obsidian/workspace.json

@@ -13,7 +13,7 @@
             "state": {
               "type": "markdown",
               "state": {
-                "file": "docs/14-forking-over-code.md",
+                "file": "docs/18-workflows.md",
                 "mode": "source",
                 "source": false
               }
@@ -85,7 +85,7 @@
             "state": {
               "type": "backlink",
               "state": {
-                "file": "docs/14-forking-over-code.md",
+                "file": "docs/18-workflows.md",
                 "collapseAll": false,
                 "extraContext": false,
                 "sortOrder": "alphabetical",
@@ -102,7 +102,7 @@
             "state": {
               "type": "outgoing-link",
               "state": {
-                "file": "docs/14-forking-over-code.md",
+                "file": "docs/18-workflows.md",
                 "linksCollapsed": false,
                 "unlinkedCollapsed": true
               }
@@ -125,7 +125,7 @@
             "state": {
               "type": "outline",
               "state": {
-                "file": "docs/14-forking-over-code.md"
+                "file": "docs/18-workflows.md"
               }
             }
           }
@@ -147,14 +147,20 @@
       "table-editor-obsidian:Advanced Tables Toolbar": false
     }
   },
-  "active": "d22cb632a0379261",
+  "active": "e74c320159094cdf",
   "lastOpenFiles": [
-    "assets/Pull-Request-Practice.md",
+    "assets/Pasted image 20240314154647.png",
+    "assets/Pasted image 20240314154551.png",
+    "docs/15-diffs.md",
+    "assets/diff-difference.png",
+    "assets/diff-hunk-headers.png",
+    "assets/diff-header.png",
+    "docs/18-workflows.md",
     "docs/14-forking-over-code.md",
+    "assets/Pull-Request-Practice.md",
     "assets/collaboration.png",
     "docs/12-remotely-useful.md",
     "docs/98-command-line-extras.md",
-    "docs/15-workflows.md",
     "CONTRIBUTE.md",
     "docs/98-command-line-extras.md",
     "assets/pasted-image-20240314105028.png",
@@ -167,8 +173,6 @@
     "output",
     "docs/00-Back.md.md",
     "docs/00-Front.md.md",
-    "assets/pasted-image-20240216114456.png",
-    "assets/pasted-image-20240216124422.png",
     "docs/99-references-and-resources.md",
     "docs/08-status-add-commit.md",
     "docs/06-read-me.md",
@@ -183,13 +187,8 @@
     "docs/05-global-settings.md",
     "docs/04-git-started.md",
     "docs/02-getting-ready.md",
-    "docs/03-repositories-and-folders.md",
-    "docs/01-what-is-version-control.md",
     "docs",
     "assets/brave_dWSQwZYc3F.mp4",
-    "assets/2024-03-01_15_03_52-AdyGCode_git-remote-demo-ii-Brave.png",
-    "assets/2024-03-01_14_57_49-New-repository-Brave.png",
-    "assets/2024-03-01_14_57_43-New-repository-Brave.png",
     "themes",
     "ReadMe.md~",
     "02-getting-ready.md~",

ReadMe.md

@@ -32,7 +32,7 @@ This ReadMe does not need a Table of contents, instead we provide links to each
 - [12 Remotely useful](docs/12-remotely-useful.md)
 - [13 Why, Hello Dolly](13-why-hello-dolly.md)
 - [14 Forking over code](docs/14-forking-over-code.md)
-- [15 Workflows](docs/15-workflows.md)
+- [15 Workflows](docs/18-workflows.md)
 - 
 - ...
 - [99 References and Resources](docs/99-references-and-resources.md)

assets/diff-difference.png

@@ -0,0 +1,92 @@
+# Diffs
+
+A diff is a standard representation of the difference between text files or sets of text files.
+
+Diffs are designed to be human readable but IDEs can make them easier to work with.
+
+They provide enough fidelity to be used as a patch to the code you are working on.
+
+When you run `git status` the question is “what is the diff?”
+
+When you run a merge – it is asking the same question.
+
+Pull or push – yep, you guessed it...
+
+## What is the difference?
+
+We will want to know there is a difference, but this is often not enough.
+
+When we know there is a difference, we then want to know what the difference is.
+
+
+•You saw an example of differences when you ran a pull request
+
+•Discuss on what levels were differences highlighted (folder/file/line/word/character)?
+
+
+## When can diffs be seen?
+
+•Between files
+
+•Between commits
+
+•Between staging (index) and the object database (repo)
+
+•Between the working copy and any of the above
+
+
+# Diff Interpretation
+
+### Header
+
+The header shows the files being compared. The two versions of the file being compared are represented by `-` and `+`.
+
+| Symbol | Version     |
+| ------ | ----------- |
+| `+`    | New Version |
+| `-`    | Old Version |
+
+These two symbols are associated with each insertion.
+
+For temporally related changes, an insertion in the past is a deletion in the present.
+
+![](assets/diff-header.png)
+
+### Hunk headers
+
+The hunk headers indicate the line numbers that are affected in the ‘-’ file and the ‘+’ file.
+
+![](assets/diff-hunk-headers.png)
+
+
+### A difference!
+
+The differences are indicated by `+` and `-`, and associated with the relevant files.
+
+| Symbol | File   | Version                 |
+| ------ | ------ | ----------------------- |
+| `-`    | `---`  | Original                |
+| `+`    | `+++`  | New                     |
+|        | common | No change between files |
+
+For example:
+```diff
+ def main():  
+-    greet("Alice")  
++    name = input("Please enter your name: ")  
++    greet(name)  
+```
+
+![](assets/diff-difference.png)
+
+### Challenge
+
+What line numbers in each file do these changes relate to?
+
+
+
+# References
+
+Content based on the following:
+
+www.oreilly.com. (n.d.). _3. Looking Around: Investigating Your Git Repository - Head First Git [Book]_. [online] Available at: https://learning.oreilly.com/library/view/head-first-git/9781492092506/ch03.html [Accessed 14 Mar. 2024].