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Is it possible to open a Windows Explorer window from PowerShell?
...xe
PS C:\> ii c:\windows\explorer.exe
PS C:\> [diagnostics.process]::start("explorer.exe")
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How to add a vertical Separator?
...would recommend reading through this article: WPF Layouts - A Visual Quick Start
– Rachel
Nov 27 '12 at 16:10
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Python - Create a list with initial capacity
...g the list, or after that. But if you want a sparsely-populated list, then starting with a list of None is definitely faster.
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Reduce, fold or scan (Left/Right)?
... a single result.
foldLeft and foldRight cumulate a single result using a start value.
scanLeft and scanRight cumulate a collection of intermediate cumulative results using a start value.
Accumulate
From LEFT and forwards...
With a collection of elements abc and a binary operator add we can exp...
List of Big-O for PHP functions
...ough array would hurt you before the characteristics of lookup Big-O would start taking effect. For example the difference between a call to array_key_exists at N=1 and N=1,000,000 is ~50% time increase.
Interesting Points:
isset/array_key_exists is much faster than in_array and array_search
+(un...
Mongod complains that there is no /data/db folder
I am using my new mac for the first time today. I am following the get started guide on the mongodb.org up until the step where one creates the /data/db directory. btw, I used the homebrew route.
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Difference between Java SE/EE/ME?
Which one should I install when I want to start learning Java? I'm going to start with some basics, so I will write simple programs that create files, directories, edit XML files and so on, nothing too complex for now.
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Regular expression for floating point numbers
.... This is probably not what you've intended.
To fix this, it's helpful to start by "anchoring" your regex with the bare-minimum required string, probably a single digit:
\d+
Now we want to add the decimal part, but it doesn't go where you think it might:
\d+\.?\d* /* This isn't quite correct. *...
How to convert Milliseconds to “X mins, x seconds” in Java?
...nishes, I will subtract the current System.currentTimeMillis() from the start variable, and I want to show them the time elapsed using a human readable format such as "XX hours, XX mins, XX seconds" or even "XX mins, XX seconds" because its not likely to take someone an hour.
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SourceKitService Terminated
...urceKitService Terminated error.
The symptoms I was having:
When I would start up a new playground, I would receive an error about not being able to communicate with the playground (Error running playground: Failed prepare for communication with playground. See this image on twitter.
When I would ...