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What is the purpose of a question mark after a type (for example: int? myVariable)?
...d the values true, false, or
null. The ability to assign null to numeric and Boolean types is
especially useful when you are dealing with databases and other data
types that contain elements that may not be assigned a value. For
example, a Boolean field in a database can store the values tru...
Why does an overridden function in the derived class hide other overloads of the base class?
...ding happens, people who respond either say that this called "name hiding" and explain how it works (which you probably already know), or explain how to override it (which you never asked about), but nobody seems to care to address the actual "why" question.
The decision, the rationale behind the n...
Simultaneously merge multiple data.frames in a list
... issue here is that each data.frame differs in terms of the number of rows and columns, but they all share the key variables (which I've called "var1" and "var2" in the code below). If the data.frames were identical in terms of columns, I could merely rbind , for which plyr's rbind.fill would...
Intellij Idea 9/10, what folders to check into (or not check into) source control?
Our team has just moved from Netbeans to Intellij 9 Ultimate and need to know what files/folders should typically be excluded from source control as they are not "workstation portable", i.e.: they reference paths that only exist on one user's computer.
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Are there any style options for the HTML5 Date picker?
...picker-indicator
So if you thought the date input could use more spacing and a ridiculous color scheme you could add the following:
::-webkit-datetime-edit { padding: 1em; }
::-webkit-datetime-edit-fields-wrapper { background: silver; }
::-webkit-datetime-edit-text { color: red; padding: 0 ...
How to redirect both stdout and stderr to a file [duplicate]
...running a bash script that creates a log file for the execution of the command
5 Answers
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How can I replace a newline (\n) using sed?
...w can I replace a newline (" \n ") with a space (" ") using the sed command?
42 Answers
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How can I find out the total physical memory (RAM) of my linux box suitable to be parsed by a shell
...
If you're interested in the physical RAM, use the command dmidecode. It gives you a lot more information than just that, but depending on your use case, you might also want to know if the 8G in the system come from 2x4GB sticks or 4x2GB sticks.
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Where is the .NET Framework 4.5 directory?
...ll find the assemblies in the 4.0 directory.
See the blogs by Rick Strahl and Scott Hanselman on this topic.
You can also find the specific versions in:
C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework
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“Width equals height” constraint in Interface Builder
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Update Xcode 5.1b5
Ctrl+click and drag from a view and release while the pointer is over the view. Select "Aspect Ratio". It will create a constraint where the first and second item is the view.
Before Xcode 5.1
You can't because the width/height edit...