Restructure examples folder (#47)

Split examples into separate markdown files, each containing a description, sample code, and a screenshot of the resulting xlsx document.

The script `generate.rb` is provided to actually generate the example documents by executing the sample code contained in the markdown files.

1 files changed, 32 insertions, 0 deletions

diff --git a/examples/auto_filter_example.md b/examples/auto_filter_example.md
new file mode 100644
index 00000000..eb42ca77
--- /dev/null
+++ b/examples/auto_filter_example.md
@@ -0,0 +1,32 @@
+## Description
+
+You could mark areas as auto filtered tables.
+
+## Code
+
+```ruby
+require 'axlsx'
+
+p = Axlsx::Package.new
+wb = p.workbook
+
+wb.add_worksheet(name: 'Auto Filter') do |sheet|
+  sheet.add_row ['Build Matrix']
+  sheet.add_row ['Build', 'Duration', 'Finished', 'Rvm']
+  sheet.add_row ['19.1', '1 min 32 sec', 'about 10 hours ago', '1.8.7']
+  sheet.add_row ['19.2', '1 min 28 sec', 'about 10 hours ago', '1.9.2']
+  sheet.add_row ['19.3', '1 min 35 sec', 'about 10 hours ago', '1.9.3']
+  sheet.auto_filter = 'A2:D5'
+  sheet.auto_filter.add_column 3, :filters, filter_items: ['1.9.2', '1.8.7']
+end
+
+p.serialize 'auto_filter_example.xlsx'
+```
+
+## Output
+
+![Output](images/auto_filter_example_1.png "Output")
+
+After resetting the filters:
+
+![Output](images/auto_filter_example_2.png "Output")