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Uninstall old versions of Ruby gems
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Way to clean out any old versions of gems.
sudo gem cleanup
If you just want to see a list of what would be removed you can use:
sudo gem cleanup -d
You can also cleanup just a specific gem by specifying its name:
sudo gem cleanup gemname
for remove specific version like 1.1.9 o...
Packing NuGet projects compiled in release mode?
... of Release to a default pulled from a project setting that can only be modified in the project file directly (no VS GUI option). To avoid the command-line property tweak for all future nuget pack calls, edit the project file XML in your favorite text editor.
– patridge
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How do I define a method which takes a lambda as a parameter in Java 8?
...(thanks to Maurice Naftalin for the hint about the JavaDoc).
For this specific use case there's java.util.function.IntBinaryOperator with a single int applyAsInt(int left, int right) method, so you could write your method like this:
static int method(IntBinaryOperator op){
return op.applyAsInt...
How to make a HTTP request using Ruby on Rails?
...nt the wheel, and you benefit from the hard work others have already done. If a gem exists that makes your life easier, there's generally no good reason not to use it.
– Marnen Laibow-Koser
Apr 10 '18 at 22:27
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How to add text at the end of each line in Vim?
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This will do it to every line in the file:
:%s/$/,/
If you want to do a subset of lines instead of the whole file, you can specify them in place of the %.
One way is to do a visual select and then type the :. It will fill in :'<,'> for you, then you type the rest of it ...
How to choose the id generation strategy when using JPA and Hibernate
...ear on this.
All generators implement the interface org.hibernate.id.IdentifierGenerator. This is a very simple interface. Some applications can choose to provide their own specialized implementations, however, Hibernate provides a range of built-in implementations. The shortcut names for the built...
Why is 'this' a pointer and not a reference?
...tly.
One of the uses of this is for an object to get a pointer to itself. If it was a reference, we'd have to write &this. On the other hand, when we write an assignment operator we have to return *this, which would look simpler as return this. So if you had a blank slate, you could argue it ei...
rails simple_form - hidden field - create?
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This is the simple_form way to do hidden inputs, however, if only a hidden input is needed, then just use Rails' hidden_field form builder since Simple Form inherits all the form builder methods.
– scarver2
Nov 4 '14 at 1:18
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Is there a naming convention for Django apps
... short, all-lowercase names. Underscores can be used
in the module name if it improves readability. Python packages should
also have short, all-lowercase names, although the use of underscores is
discouraged.
So, 1 and 3 are both valid, but 3 would be the recommended approach.
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Is it possible to search for a particular filename on GitHub?
...hey changed that. It's a general issue for code search, not just those specific searches.
– Orangenhain
Sep 6 '16 at 20:37
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