Add feature to check/uncheck multiple tasks

Author: coderick14

README.md

@@ -1,6 +1,6 @@
 ![Built with love](http://forthebadge.com/images/badges/built-with-love.svg)
 # Tusker
-A dead simple todo manager in *less than 100 lines* of code.  
+A dead simple todo manager in about *a hundred lines* of code.  
 For those who live in the terminal.
 
 ### Installation
@@ -19,31 +19,23 @@ tusker show
      2	❌      Collect NOC certificate          25 April 2018 11:53:23
      3	❌      Fill rems                        25 April 2018 11:53:25
 ```
-- Mark a task as done
+- Mark one or more tasks as done
 ```
-tusker check 1
+tusker check 1 3
 tusker show
      1	✓      Collect laundry                  25 April 2018 11:53:21
      2	❌      Collect NOC certificate          25 April 2018 11:53:23
-     3	❌      Fill rems                        25 April 2018 11:53:25
+     3	✓      Fill rems                        25 April 2018 11:53:25
 ```
-- Mark a task as undone
+- Mark one or more tasks as undone
 ```
-tusker uncheck 1
+tusker uncheck 1 3
 tusker show
      1	❌      Collect laundry                  25 April 2018 11:53:21
      2	❌      Collect NOC certificate          25 April 2018 11:53:23
      3	❌      Fill rems                        25 April 2018 11:53:25
 ```
-- Delete a task from the list
-```
-tusker del 2
-tusker show
-     1	❌      Collect laundry                  25 April 2018 11:53:21
-     2	❌      Fill rems                        25 April 2018 11:53:25
-```
-
-- Delete multiple tasks from the list
+- Delete one or more tasks from the list
 ```
 tusker del 1 3
 tusker show

tusker

@@ -20,11 +20,9 @@ check_args() {
         return
     fi
 
-    if [ $# -gt 1 ] && ([ "$1" = "add" ] || [ "$1" = "del" ]); then
+    if [ $# -gt 1 ]; then
         return
-    fi
-
-    if [ $# -ne 2 ]; then
+    else
         printf "Not a valid command. Type 'tusker help' for usage.\n"
         exit
     fi
@@ -55,13 +53,17 @@ delete_task() {
 }
 
 check_task() {
-    task_id=$1
-    sed -i "$task_id s/^./$TICK/" "$FILE_NAME"
+    for task_id in "$@"
+    do
+        sed -i "$task_id s/^./$TICK/" "$FILE_NAME"
+    done
 }
 
 uncheck_task() {
-    task_id=$1
-    sed -i "$task_id s/^./$CROSS/" "$FILE_NAME"
+    for task_id in "$@"
+    do
+        sed -i "$task_id s/^./$CROSS/" "$FILE_NAME"
+    done
 }
 
 show_tasks() {
@@ -96,13 +98,15 @@ main() {
         ;;
 
         check)
-        check_task "$2"
-        printf "Task marked as done\n"
+        shift
+        check_task "$@"
+        printf "Task(s) marked as done\n"
         ;;
 
         uncheck)
-        uncheck_task "$2"
-        printf "Task marked as undone\n"
+        shift
+        uncheck_task "$@"
+        printf "Task(s) marked as undone\n"
         ;;
 
         show)