Organized examples with notes and results

SamErde · Feb 28, 2024 · f5ebe13 · f5ebe13
1 parent afb06c6
commit f5ebe13
Showing 1 changed file with 59 additions and 34 deletions.
diff --git a/Snippets/Get Patch Tuesday Variations.ps1 b/Snippets/Get Patch Tuesday Variations.ps1
@@ -1,32 +1,51 @@
 <#
-    https://twitter.com/SamErde/status/1648023633913167875
+    .SYNOPSIS
+        This script demonstrates several different ways to find Patch Tuesday (the 2nd Tuesday of the month).
+
+    .DESCRIPTION
+        This script demonstrates several different ways to find Patch Tuesday (the 2nd Tuesday of the month).
+        It's a fun exercise to see how different people approach the same problem, and how some solutions are
+        more readable and understandable than others--but beauty is in the eye of the beholder!
+    
+    .NOTES
+        File Name      : Get Patch Tuesday Variations.ps1
+        Author         : Sam Erde (@SamErde) and friends on Twitter/X
+
+        Read the thread that inspired these examples at <https://twitter.com/SamErde/status/1648023633913167875>.
 #>
 
+# Find the first day of the moth
 $FirstDayOfMonth = (Get-Date -Day 1).Date
 
-# This one works but is too complex to understand. I don't even remember!
-$PatchTuesday1 = $FirstDayOfMonth.AddDays( ([DayOfWeek]'Tuesday' - $FirstDayOfMonth.DayOfWeek + 7) % 7 + 7)
+
+
+# $PatchTuesday = # ...one of the following examples...
+
+
+
+# This one works but is too complex to understand. I don't even remember how or why it works!
+$PatchTuesday = $FirstDayOfMonth.AddDays( ([DayOfWeek]'Tuesday' - $FirstDayOfMonth.DayOfWeek + 7) % 7 + 7)
+$PatchTuesday
+
+
 
 # This one checks the first 16 days of the month, grabs each instance of a Tuesday, and keeps the 2nd one (index of 1). Still weird and complex.
-$PatchTuesday2 = (0..16 | ForEach-Object {$FirstDayOfMonth.AddDays($_) } | Where-Object {$_.DayOfWeek -like "Tuesday"})[1]
+$PatchTuesday = (0..16 | ForEach-Object {$FirstDayOfMonth.AddDays($_) } | Where-Object {$_.DayOfWeek -like "Tuesday"})[1]
+$PatchTuesday
+
+
 
 # This one from Mike F. Robbins is the most readable and understandable. It checks if the first Tuesday is in the first week, and if not, it adds 7 days to it.
-while ($FirstDayOfMonth.DayOfWeek -ne 'Tuesday') {
-    $FirstDayOfMonth = $FirstDayOfMonth.AddDays(1)
+$Day = $FirstDayOfMonth
+while ($Day.DayOfWeek -ne 'Tuesday') {
+    $Day = $Day.AddDays(1)
 }
-$FirstDayOfMonth.AddDays(7)
+$PatchTuesday = $Day.AddDays(7)
+$PatchTuesday
 
 
-# This example from Kit @smallfoxx might make sense to some people and not others. It helps to step through it with debug to see the values as it runs.
-if ($FirstDayOfMonth.DayOfWeek -gt [DayOfWeek]"Tuesday") {
-    $Shift=[DayOfWeek]"Tuesday" + 7
-}
-else {
-    $Shift=[DayOfWeek]"Tuesday"
-}
-$FirstDayOfMonth.AddDays($Shift - $FirstDayOfMonth.DayOfWeek)
 
-# And here's one from Anthony J Fontanez (ajf8729) that forgoes complex logic for a longer, but simple switch statement.
+# And here's one from Anthony J Fontanez (@ajf8729) that forgoes complex logic for a simple "hard-coded" switch statement.
 switch ( (Get-Date -Day 1).DayOfWeek ) {
     'Tuesday'   { 8 }
     'Monday'    { 9 }
@@ -36,7 +55,6 @@ switch ( (Get-Date -Day 1).DayOfWeek ) {
     'Thursday'  { 13 }
     'Wednesday' { 14 }
 }
-
 # I wrote the day into the date, et voila! Patch Tuesday.
 switch ( (Get-Date -Day 1).DayOfWeek ) {
     'Tuesday'   { $Day = 8 }
@@ -47,11 +65,14 @@ switch ( (Get-Date -Day 1).DayOfWeek ) {
     'Thursday'  { $Day = 13 }
     'Wednesday' { $Day = 14 }
 }
-$PatchTuesdaySwitch = (Get-Date -Day $Day).Date
+$PatchTuesday = (Get-Date -Day $Day).Date
+$PatchTuesday
+
+
 
-# Here's a sample from James Orlando (@Jorlando82).
+# Here's a similar one from James Orlando (@Jorlando82) that also gets the 1st day of the month in a slightly different way.
 $FirstDay = (Get-Date).AddDays(-((Get-Date).AddDays(-1)).Day)
-Switch ($FirstDay.DayOfWeek) {
+$PatchTuesday = Switch ($FirstDay.DayOfWeek) {
     "Monday"   { $FirstDay.AddDays(8) }
     "Tuesday"  { $FirstDay.AddDays(7) }
     "Wednesday"{ $FirstDay.AddDays(13) }
@@ -60,6 +81,22 @@ Switch ($FirstDay.DayOfWeek) {
     "Saturday" { $FirstDay.AddDays(10) }
     "Sunday"   { $FirstDay.AddDays(9) }
 }
+$PatchTuesday
+
+
+
+# This example from Kit (@smallfoxx) works great but still challenges my ability to explain in a simple way.
+if ($FirstDayOfMonth.DayOfWeek -gt [DayOfWeek]"Tuesday") {
+    $Shift=[DayOfWeek]"Tuesday" + 7
+}
+else {
+    $Shift=[DayOfWeek]"Tuesday"
+}
+# Use the shift to find the 1st Tuesday and then add 7 for the 2nd Tuesday.
+$PatchTuesday = $FirstDayOfMonth.AddDays($Shift - $FirstDayOfMonth.DayOfWeek + 7)
+$PatchTuesday
+
+
 
 # Then kit (@smallfoxx) took it further and made it a function.
 function WeekdayInMonth {
@@ -78,24 +115,12 @@ function WeekdayInMonth {
     }
     $FirstDay.AddDays($Shift)
 }
+
 function PatchTuesday {
     param(
         [datetime]$Date = (Get-Date)
     )
 
     WeekdayInMonth -Date $Date -Weekday [DayOfWeek]::Tuesday -WeekNumber 2
 }
-$PatchTuesdayFunction = PatchTuesday
-
-
-
-
-
-<#
-    -----
-#>
-$PatchTuesday
-$PatchTuesday1
-$PatchTuesday2
-$PatchTuesdaySwitch
-$PatchTuesdayFunction
+$PatchTuesday = PatchTuesday