PowerShell - leap, raindrops, reverse-string, two-fer

powershell/leap/.exercism/config.json

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+{
+  "blurb": "Given a year, report if it is a leap year.",
+  "authors": [
+    "spuder"
+  ],
+  "contributors": [
+    "gyssels",
+    "kchenery"
+  ],
+  "files": {
+    "solution": [
+      "LeapYear.ps1"
+    ],
+    "test": [
+      "LeapYear.tests.ps1"
+    ],
+    "example": [
+      ".meta/LeapYear.example.ps1"
+    ]
+  },
+  "source": "JavaRanch Cattle Drive, exercise 3",
+  "source_url": "http://www.javaranch.com/leap.jsp"
+}

powershell/leap/.exercism/metadata.json

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+{"track":"powershell","exercise":"leap","id":"0a3fd49cec7f4abab206a09b5accdf20","url":"https://exercism.org/tracks/powershell/exercises/leap","handle":"Xevion","is_requester":true,"auto_approve":false}

powershell/leap/.version

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+1

powershell/leap/HELP.md

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+# Help
+
+## Running the tests
+
+To run the tests run the command `Invoke-Pester` from within the exercise directory.
+
+## Submitting your solution
+
+You can submit your solution using the `exercism submit LeapYear.ps1` command.
+This command will upload your solution to the Exercism website and print the solution page's URL.
+
+It's possible to submit an incomplete solution which allows you to:
+
+- See how others have completed the exercise
+- Request help from a mentor
+
+## Need to get help?
+
+If you'd like help solving the exercise, check the following pages:
+
+- The [PowerShell track's documentation](https://exercism.org/docs/tracks/powershell)
+- [Exercism's support channel on gitter](https://gitter.im/exercism/support)
+- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs)
+
+Should those resources not suffice, you could submit your (incomplete) solution to request mentoring.
+
+To get help if you are having trouble, you can use one of the following resources:
+
+- [Powershell Documentation][powershell docs]
+
+[Add more resources]: TODO
+
+[powershell docs]: https://docs.microsoft.com/en-us/powershell/

powershell/leap/LeapYear.ps1

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+function Test-LeapYear {
+    param( [int]$year )
+
+    if ((($year % 4 -eq 0) -and !($year % 100 -eq 0)) -or ($year % 400 -eq 0)) {
+        return $true
+    }
+    
+    return $false
+}

powershell/leap/LeapYear.tests.ps1

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+BeforeAll {
+    . ".\LeapYear.ps1"
+}
+
+Describe "LeapYear Tests" {
+    It "Year not divisible by 4: common year" {
+        Test-LeapYear(2015) | Should -Be $false
+    }
+
+    It "Year divisible by 4, not divisible by 100: leap year" {
+        Test-LeapYear(1996) | Should -Be $true
+    }
+
+    It "Year divisible by 100, not divisible by 400: common year" {
+        Test-LeapYear(2100) | Should -Be $false
+    }
+
+    It "Year divisible by 400: leap year" {
+        Test-LeapYear(2000) | Should -Be $true
+    }
+}

powershell/leap/README.md

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+# Leap
+
+Welcome to Leap on Exercism's PowerShell Track.
+If you need help running the tests or submitting your code, check out `HELP.md`.
+
+## Instructions
+
+Given a year, report if it is a leap year.
+
+The tricky thing here is that a leap year in the Gregorian calendar occurs:
+
+```text
+on every year that is evenly divisible by 4
+  except every year that is evenly divisible by 100
+    unless the year is also evenly divisible by 400
+```
+
+For example, 1997 is not a leap year, but 1996 is.  1900 is not a leap
+year, but 2000 is.
+
+## Notes
+
+Though our exercise adopts some very simple rules, there is more to
+learn!
+
+For a delightful, four minute explanation of the whole leap year
+phenomenon, go watch [this youtube video][video].
+
+[video]: http://www.youtube.com/watch?v=xX96xng7sAE
+
+## Source
+
+### Created by
+
+- @spuder
+
+### Contributed to by
+
+- @gyssels
+- @kchenery
+
+### Based on
+
+JavaRanch Cattle Drive, exercise 3 - http://www.javaranch.com/leap.jsp

powershell/raindrops/.exercism/config.json

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+{
+  "blurb": "Convert a number to a string, the content of which depends on the number's factors.",
+  "authors": [
+    "gyssels"
+  ],
+  "contributors": [
+    "kchenery"
+  ],
+  "files": {
+    "solution": [
+      "Raindrops.ps1"
+    ],
+    "test": [
+      "Raindrops.tests.ps1"
+    ],
+    "example": [
+      ".meta/Raindrops.example.ps1"
+    ]
+  },
+  "source": "A variation on FizzBuzz, a famous technical interview question that is intended to weed out potential candidates. That question is itself derived from Fizz Buzz, a popular children's game for teaching division.",
+  "source_url": "https://en.wikipedia.org/wiki/Fizz_buzz"
+}

powershell/raindrops/.exercism/metadata.json

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+{"track":"powershell","exercise":"raindrops","id":"5b35a1ecc3b94181bc46ed1119958c44","url":"https://exercism.org/tracks/powershell/exercises/raindrops","handle":"Xevion","is_requester":true,"auto_approve":false}

powershell/raindrops/.version

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+0

powershell/raindrops/0

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+0

powershell/raindrops/HELP.md

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+# Help
+
+## Running the tests
+
+To run the tests run the command `Invoke-Pester` from within the exercise directory.
+
+## Submitting your solution
+
+You can submit your solution using the `exercism submit Raindrops.ps1` command.
+This command will upload your solution to the Exercism website and print the solution page's URL.
+
+It's possible to submit an incomplete solution which allows you to:
+
+- See how others have completed the exercise
+- Request help from a mentor
+
+## Need to get help?
+
+If you'd like help solving the exercise, check the following pages:
+
+- The [PowerShell track's documentation](https://exercism.org/docs/tracks/powershell)
+- [Exercism's support channel on gitter](https://gitter.im/exercism/support)
+- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs)
+
+Should those resources not suffice, you could submit your (incomplete) solution to request mentoring.
+
+To get help if you are having trouble, you can use one of the following resources:
+
+- [Powershell Documentation][powershell docs]
+
+[Add more resources]: TODO
+
+[powershell docs]: https://docs.microsoft.com/en-us/powershell/

powershell/raindrops/README.md

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+# Raindrops
+
+Welcome to Raindrops on Exercism's PowerShell Track.
+If you need help running the tests or submitting your code, check out `HELP.md`.
+
+## Instructions
+
+Your task is to convert a number into a string that contains raindrop sounds corresponding to certain potential factors. A factor is a number that evenly divides into another number, leaving no remainder. The simplest way to test if a one number is a factor of another is to use the [modulo operation](https://en.wikipedia.org/wiki/Modulo_operation).
+
+The rules of `raindrops` are that if a given number:
+
+- has 3 as a factor, add 'Pling' to the result.
+- has 5 as a factor, add 'Plang' to the result.
+- has 7 as a factor, add 'Plong' to the result.
+- _does not_ have any of 3, 5, or 7 as a factor, the result should be the digits of the number.
+
+## Examples
+
+- 28 has 7 as a factor, but not 3 or 5, so the result would be "Plong".
+- 30 has both 3 and 5 as factors, but not 7, so the result would be "PlingPlang".
+- 34 is not factored by 3, 5, or 7, so the result would be "34".
+
+## Source
+
+### Created by
+
+- @gyssels
+
+### Contributed to by
+
+- @kchenery
+
+### Based on
+
+A variation on FizzBuzz, a famous technical interview question that is intended to weed out potential candidates. That question is itself derived from Fizz Buzz, a popular children's game for teaching division. - https://en.wikipedia.org/wiki/Fizz_buzz

powershell/raindrops/Raindrops.ps1

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+Function Get-Raindrops() {
+    <#
+    .SYNOPSIS
+    Given a number convert it to Pling, Plang, Plong if it has factors of 3, 5 or 7.
+    
+    .DESCRIPTION
+    Convert a number to a string, the contents of which depend on the number's factors.
+
+    - If the number has 3 as a factor, output 'Pling'.
+    - If the number has 5 as a factor, output 'Plang'.
+    - If the number has 7 as a factor, output 'Plong'.
+    - If the number does not have 3, 5, or 7 as a factor, just pass the number's digits straight through.
+    
+    .PARAMETER Rain
+    The number to evaluate
+    
+    .EXAMPLE
+    Get-Raindrops -Rain 35
+
+    This will return PlangPlong as it has factors of 5 and 7
+
+    .EXAMPLE
+    Get-Raindrops -Rain 12121
+
+    This will return 12121 as it does not contain factors of 3, 5 or 7 so the value is passed through.
+    #>
+    [CmdletBinding()]
+    Param(
+        [int]$Rain
+    )
+
+
+    [String] $result = ""
+    if ($Rain % 3 -eq 0) { $result += "Pling" }
+    if ($Rain % 5 -eq 0) { $result += "Plang" }
+    if ($Rain % 7 -eq 0) { $result += "Plong" }
+
+    if ($result.Length -gt 0) { return $result }
+    return $Rain.ToString()
+}

powershell/raindrops/Raindrops.tests.ps1

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+BeforeAll {
+    . ".\Raindrops.ps1"
+}
+
+Describe "Test Get-Raindrops" {
+
+	It "Given the number <Number> it should output <Result>" -TestCases @(
+		@{ Number = 1; Result = "1" },
+		@{ Number = 3; Result = "Pling" },
+		@{ Number = 5; Result = "Plang" },
+		@{ Number = 7; Result = "Plong" },
+		@{ Number = 6; Result = "Pling" },
+		@{ Number = 9; Result = "Pling" },
+		@{ Number = 10; Result = "Plang" },
+		@{ Number = 14; Result = "Plong" },
+		@{ Number = 15; Result = "PlingPlang" },
+		@{ Number = 21; Result = "PlingPlong" },
+		@{ Number = 25; Result = "Plang" },
+		@{ Number = 27; Result = "Pling" },
+		@{ Number = 35; Result = "PlangPlong" },
+		@{ Number = 49; Result = "Plong" },
+		@{ Number = 52; Result = "52" },
+		@{ Number = 105; Result = "PlingPlangPlong" },
+		@{ Number = 3125; Result = "Plang" },
+		@{ Number = 12121; Result = "12121" }
+	) {
+		Param(
+			[int]$Number,
+			[string]$Result
+		)
+
+		Get-Raindrops -Rain $Number | Should -BeExactly $Result
+	}
+}

powershell/reverse-string/.exercism/config.json

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+{
+  "blurb": "Reverse a string",
+  "authors": [
+    "gyssels"
+  ],
+  "contributors": [
+    "kchenery"
+  ],
+  "files": {
+    "solution": [
+      "ReverseString.ps1"
+    ],
+    "test": [
+      "ReverseString.tests.ps1"
+    ],
+    "example": [
+      ".meta/ReverseString.example.ps1"
+    ]
+  },
+  "source": "Introductory challenge to reverse an input string",
+  "source_url": "https://medium.freecodecamp.org/how-to-reverse-a-string-in-javascript-in-3-different-ways-75e4763c68cb"
+}

powershell/reverse-string/.exercism/metadata.json

@@ -0,0 +1 @@
+{"track":"powershell","exercise":"reverse-string","id":"675925dac0bc4ca59b00bd1f0515381e","url":"https://exercism.org/tracks/powershell/exercises/reverse-string","handle":"Xevion","is_requester":true,"auto_approve":false}

powershell/reverse-string/.version

@@ -0,0 +1 @@
+1

powershell/reverse-string/HELP.md

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+# Help
+
+## Running the tests
+
+To run the tests run the command `Invoke-Pester` from within the exercise directory.
+
+## Submitting your solution
+
+You can submit your solution using the `exercism submit ReverseString.ps1` command.
+This command will upload your solution to the Exercism website and print the solution page's URL.
+
+It's possible to submit an incomplete solution which allows you to:
+
+- See how others have completed the exercise
+- Request help from a mentor
+
+## Need to get help?
+
+If you'd like help solving the exercise, check the following pages:
+
+- The [PowerShell track's documentation](https://exercism.org/docs/tracks/powershell)
+- [Exercism's support channel on gitter](https://gitter.im/exercism/support)
+- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs)
+
+Should those resources not suffice, you could submit your (incomplete) solution to request mentoring.
+
+To get help if you are having trouble, you can use one of the following resources:
+
+- [Powershell Documentation][powershell docs]
+
+[Add more resources]: TODO
+
+[powershell docs]: https://docs.microsoft.com/en-us/powershell/

powershell/reverse-string/README.md

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+# Reverse String
+
+Welcome to Reverse String on Exercism's PowerShell Track.
+If you need help running the tests or submitting your code, check out `HELP.md`.
+
+## Instructions
+
+Reverse a string
+
+For example:
+input: "cool"
+output: "looc"
+
+## Source
+
+### Created by
+
+- @gyssels
+
+### Contributed to by
+
+- @kchenery
+
+### Based on
+
+Introductory challenge to reverse an input string - https://medium.freecodecamp.org/how-to-reverse-a-string-in-javascript-in-3-different-ways-75e4763c68cb

powershell/reverse-string/ReverseString.ps1

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+Function Get-ReverseString {
+    [CmdletBinding()]
+    Param(
+        [Parameter(Position=1, ValueFromPipeline=$true)]
+        [string]$Forward
+	)
+	
+    $x = $Forward.ToCharArray()
+    [array]::Reverse($x)
+    return -join $x
+}

powershell/reverse-string/ReverseString.tests.ps1

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+BeforeAll {
+    . ".\ReverseString.ps1"
+}
+
+Describe "Get-ReverseString Tests" {
+	It "Given <Forward> it outputs <Reverse>" -TestCases @(
+		@{ Forward = ""; Reverse = "" },
+		@{ Forward = "PowerShell"; Reverse = "llehSrewoP" },
+		@{ Forward = "robot"; Reverse = "tobor" },
+		@{ Forward = "Ramen"; Reverse = "nemaR" },
+		@{ Forward = "I'm hungry!"; Reverse = "!yrgnuh m'I" },
+		@{ Forward = "racecar"; Reverse = "racecar" }
+	) {
+		Param(
+			[string]$Forward,
+			[string]$Reverse
+		)
+
+		Get-ReverseString -Forward $Forward | Should -BeExactly $Reverse
+	}
+}

powershell/two-fer/.exercism/config.json

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+{
+  "blurb": "Create a sentence of the form \"One for X, one for me.\"",
+  "authors": [
+    "gyssels"
+  ],
+  "contributors": [
+    "cmccandless",
+    "kchenery",
+    "sjwarner"
+  ],
+  "files": {
+    "solution": [
+      "TwoFer.ps1"
+    ],
+    "test": [
+      "TwoFer.tests.ps1"
+    ],
+    "example": [
+      ".meta/TwoFer.example.ps1"
+    ]
+  },
+  "source_url": "https://github.com/exercism/problem-specifications/issues/757"
+}

powershell/two-fer/.exercism/metadata.json

@@ -0,0 +1 @@
+{"track":"powershell","exercise":"two-fer","id":"ee6acfe67bf6423e8ceab007e73d57ac","url":"https://exercism.org/tracks/powershell/exercises/two-fer","handle":"Xevion","is_requester":true,"auto_approve":false}

powershell/two-fer/.version

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+1

powershell/two-fer/HELP.md

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+# Help
+
+## Running the tests
+
+To run the tests run the command `Invoke-Pester` from within the exercise directory.
+
+## Submitting your solution
+
+You can submit your solution using the `exercism submit TwoFer.ps1` command.
+This command will upload your solution to the Exercism website and print the solution page's URL.
+
+It's possible to submit an incomplete solution which allows you to:
+
+- See how others have completed the exercise
+- Request help from a mentor
+
+## Need to get help?
+
+If you'd like help solving the exercise, check the following pages:
+
+- The [PowerShell track's documentation](https://exercism.org/docs/tracks/powershell)
+- [Exercism's support channel on gitter](https://gitter.im/exercism/support)
+- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs)
+
+Should those resources not suffice, you could submit your (incomplete) solution to request mentoring.
+
+To get help if you are having trouble, you can use one of the following resources:
+
+- [Powershell Documentation][powershell docs]
+
+[Add more resources]: TODO
+
+[powershell docs]: https://docs.microsoft.com/en-us/powershell/

powershell/two-fer/README.md

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+# Two Fer
+
+Welcome to Two Fer on Exercism's PowerShell Track.
+If you need help running the tests or submitting your code, check out `HELP.md`.
+
+## Instructions
+
+`Two-fer` or `2-fer` is short for two for one. One for you and one for me.
+
+Given a name, return a string with the message:
+
+```text
+One for name, one for me.
+```
+
+Where "name" is the given name.
+
+However, if the name is missing, return the string:
+
+```text
+One for you, one for me.
+```
+
+Here are some examples:
+
+|Name    |String to return
+|:-------|:------------------
+|Alice   |One for Alice, one for me.
+|Bob     |One for Bob, one for me.
+|        |One for you, one for me.
+|Zaphod  |One for Zaphod, one for me.
+
+## Source
+
+### Created by
+
+- @gyssels
+
+### Contributed to by
+
+- @cmccandless
+- @kchenery
+- @sjwarner
+
+### Based on
+
+https://github.com/exercism/problem-specifications/issues/757

powershell/two-fer/TwoFer.ps1

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+Function Get-TwoFer(){
+    <#
+    .SYNOPSIS
+    "Two-fer" is short for two for one. One for you and one for me.
+    
+    .DESCRIPTION
+    If the given name is "Alice", the result should be "One for Alice, one for me."
+    If no name is given, the result should be "One for you, one for me."
+    
+    .PARAMETER Name
+    The name to use.
+    
+    .EXAMPLE
+    Get-TwoFer
+
+    Will return: One for you, one for me
+
+    .EXAMPLE
+    Get-TwoFer -Name Alice
+    
+    Will return: One for Alice, one for me
+    #>
+    [CmdletBinding()]
+    Param(
+        [Parameter(Mandatory=$false, Position=0)]
+        [string]$Name
+    )
+
+    # if ($Name -eq $null -or $Name.Length -eq 0) { $Name = 'you'}
+    if ([string]::IsNullOrEmpty($Name)) { $Name = 'you' }
+    return "One for $($Name), one for me"
+}

powershell/two-fer/TwoFer.tests.ps1

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+BeforeAll {
+    . ".\TwoFer.ps1"
+}
+
+Describe "Get-TwoFer Tests" {
+
+    It "Given <Name> expects <Expected>" -TestCases @(
+        @{ Name = $null; Expected = "One for you, one for me" },
+        @{ Name = ""; Expected = "One for you, one for me" },
+        @{ Name = "Alice"; Expected = "One for Alice, one for me" }
+    ) {
+        Param(
+            $Name, $Expected
+        )
+
+        Get-TwoFer -Name $Name | Should -Be $Expected
+    }
+}