Categorize ledger

_config.yml

@@ -47,6 +47,7 @@ category_names:
   - HTML
   - JavaScript
   - JavaScript libraries
+  - Ledger
   - Markup
   - Node.js
   - Rails

ledger-csv.md

@@ -1,5 +1,6 @@
 ---
 title: Ledger CSV format
+category: Ledger
 ---
 
     $ ledger csv

ledger-examples.md

@@ -1,5 +1,6 @@
 ---
 title: Ledger examples
+category: Ledger
 ---
 
 Inspecting transactions:

ledger-periods.md

@@ -1,5 +1,6 @@
 ---
 title: Ledger periods
+category: Ledger
 ---
 
     [INTERVAL] [BEGIN] [END]

ledger-query.md

@@ -1,5 +1,6 @@
 ---
 title: Ledger queries
+category: Ledger
 ---
 
  - @`payee`

ledger.md

@@ -1,5 +1,6 @@
 ---
 title: Ledger CLI
+category: Ledger
 ---
 
     $ ledger bal

rails-tricks.md

@@ -58,4 +58,7 @@ Order
 
     scope :recent, -> { order created_at: :desc }
 
+Group by month
 
+    .group("to_char(created_at, 'YYYY-MM')")
+    .group("to_char(created_at, 'YYYY-MM')").count