dd deletes an entire line

src/atom/editor.coffee

@@ -64,6 +64,9 @@ class Editor extends Template
     deleteChar: ->
       @aceEditor.remove 'right'
 
+    deleteLine: ->
+      @aceEditor.removeLines()
+
     moveLeft: ->
       @aceEditor.navigateLeft()
 

src/atom/vim-mode-operators.coffee

@@ -20,6 +20,14 @@ module.exports =
     execute: (editor) ->
       _.times @count, => @operatorToRepeat.execute(editor)
 
+  Delete: class
+    complete: null
+
+    execute: (editor) ->
+      editor.deleteLine()
+
+    isComplete: -> @complete
+
   DeleteChar: class
     execute: (editor) ->
       editor.deleteChar()

src/atom/vim-mode.coffee

@@ -25,12 +25,14 @@ class VimMode
 
     @bindCommandModeKeys
       'i': 'insert'
+      'd': 'delete'
       'x': 'delete-char'
       'h': 'move-left'
       'j': 'move-up'
 
     @handleCommands
       'insert': => @activateInsertMode()
+      'delete': => @delete()
       'delete-char': => new op.DeleteChar
       'move-left': => new op.MoveLeft
       'move-up': => new op.MoveUp
@@ -65,6 +67,13 @@ class VimMode
     else
       @pushOperator(new op.NumericPrefix(num))
 
+  delete: () ->
+    if @topOperator() instanceof op.Delete
+      @topOperator().complete = true
+      @processOpStack()
+    else
+      @pushOperator new op.Delete()
+
   pushOperator: (op) ->
     @opStack.push(op)
     @processOpStack()