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/column_styles_example.md b/examples/column_styles_example.md
new file mode 100644
index 00000000..87ab6d76
--- /dev/null
+++ b/examples/column_styles_example.md
@@ -0,0 +1,32 @@
+## Description
+
+There is a way to add styles to a whole column.
+
+## Code
+
+```ruby
+require 'axlsx'
+
+p = Axlsx::Package.new
+wb = p.workbook
+
+s = wb.styles
+percent = s.add_style num_fmt: 9, bg_color: '0000FF'
+
+wb.add_worksheet(name: 'Custom column types') do |sheet|
+  sheet.add_row ['A', 'B', 'Percent', 'Hidden', 'E']
+  sheet.add_row [1, 2, 0.3, 4, 5.0]
+  sheet.add_row [1, 2, 0.2, 4, 5.0]
+  sheet.add_row [1, 2, 0.1, 4, 5.0]
+
+  # Apply the percent style to the column at index 2 skipping the first row.
+  sheet.col_style 2, percent, row_offset: 1
+  sheet.column_info[3].hidden = true
+end
+
+p.serialize 'column_styles_example.xlsx'
+```
+
+## Output
+
+![Output](images/column_styles_example.png "Output")