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How can I check if a string is null or empty in PowerShell?

Is there a built-in IsNullOrEmpty -like function in order to check if a string is null or empty, in PowerShell? 11 Answers...
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Adding a new entry to the PATH variable in ZSH

I'm using zsh and I'm trying to add a new entry ( /home/david/pear/bin ) to the PATH variable but I don't know how. 6 Ans...
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How to run code when a class is subclassed? [duplicate]

Is there a way to trigger code when my class is subclassed? 2 Answers 2 ...
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Entity Framework 4 Single() vs First() vs FirstOrDefault()

I'm having a devil of a time finding a comparison of the different ways to query for a single item, and when to use each. 6...
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How to create a sequence of integers in C#?

F# has sequences that allows to create sequences: 8 Answers 8 ...
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Subversion stuck due to “previous operation has not finished”?

If I try to update my subversion repo, it says I must run cleanup. If I run cleanup, it says a file is missing. (I deleted a MASSIVE directory of files that failed to commit this morning from my home pc, but then I commit the same set of files from work, and now my home repo is bust). So, cleanup sa...
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How to get an enum value from a string value in Java?

Say I have an enum which is just 27 Answers 27 ...
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Is div inside list allowed? [duplicate]

I know that DIV inside LI isn't allowed, but I've seen it lately on many "big" websites like Smashing Magazine , Web Designer Wall ... etc. ...
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How to get the first word of a sentence in PHP?

I want to extract the first word of a variable from a string. For example, take this input: 22 Answers ...
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Format Float to n decimal places

I need to format a float to "n"decimal places. 11 Answers 11 ...