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with the URL of your Mp3
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To verify we have content in the file, we call dir (Get-ChildItem) and reference the specific file to which we dumped content:PS >dir >. est.txt
As you can see, the Length (character count) is 6572. That sounds about right for this directory. Now, lets clear out the files contents:PS >dir . est.txtDirectory: C:dirMode LastWriteTime LengthName---- ------------- -----------a--- 11/2/2012 11:14 PM 6572 test.txt
To verify it did the job, we call Get-ChildItem again which displays a .length property of 0.PS >Clear-Content -Path. est.txt
As noted in the help, "The Clear-Content cmdlet deletes the contents of an item, such as deleting the text from a file, but it does not delete the item. As a result, the item exists, but it is empty. Clear-Content is similar to Clear-Item, but it works on files instead of on aliases and variables." It is important to keep in mind, as indicated above, it works specifically on files, not, other providers.PS >dir . est.txtDirectory: C:dirMode LastWriteTime LengthName---- ------------- -----------a--- 11/2/2012 11:15 PM 0 test.txt
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Comparison of the DQN agent with the best reinforcement learning methods in the literature. The performance of DQN is normalized with respect to a professional human games tester (100% level) and random play (0% level). Note that the normalized performance of DQN, expressed as a percentage, is calculated as: 100 X (DQN score - random play score)/(human score - random play score). Error bars indicate s.d. across the 30 evaluation episodes, starting with different initial conditions. Figure courtesy of Mnih et al. Human-level control through deep reinforcement learning, Nature 26 Feb. 2015. |
The two key lines here are the IsWellFormedUriString and TryCreate . You can get more details about how these work from MSDN.function Test-Uri{<#.NOTESAuthor: Will SteeleLast Modified Date: 07/27/2012.EXAMPLETest-Uri -Uri http://www.msn.comTrue.EXAMPLETest-Uri -Uri http:/hax0r.comFalse#>param([ValidateNotNullOrEmpty()][String]$Uri)if([System.Uri]::IsWellFormedUriString($Uri, [System.UriKind]::RelativeOrAbsolute)){[System.Uri]::TryCreate($Uri, [System.UriKind]::RelativeOrAbsolute, [ref] $uri)}else{$false}}
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via Personal Recipe 895909