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Check if a table exists in Rails
...e available in Rails 5:
drop_table :kittens, if_exists: true
Reference: https://github.com/rails/rails/pull/16366
And here's the Rails 5 ActiveRecord's CHANGELOG:
Introduce the :if_exists option for drop_table.
Example:
drop_table(:posts, if_exists: true)
That would execute:
DRO...
How to pass macro definition from “make” command line arguments (-D) to C source code?
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What is the difference between getFields and getDeclaredFields in Java reflection
... I need all fields from all parent classes?
Some code is needed, e.g. from https://stackoverflow.com/a/35103361/755804:
public static List<Field> getAllModelFields(Class aClass) {
List<Field> fields = new ArrayList<>();
do {
Collections.addAll(fields, aClass.getDec...
WPF Data Binding and Validation Rules Best Practices
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@Media min-width & max-width
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EC2 instance types's exact network performance?
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Copy object values in Visual Studio debug mode
...
There is a recent extension Object Exporter that does this conveniently.
http://www.omarelabd.net/exporting-objects-from-the-visual-studio-debugger/
Extension: https://visualstudiogallery.msdn.microsoft.com/c6a21c68-f815-4895-999f-cd0885d8774f
...
What does it mean in shell when we put a command inside dollar sign and parentheses: $(command)
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How to Customize the time format for Python logging?
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Maintain aspect ratio of div but fill screen width and height in CSS?
...
There is now a new CSS property specified to address this: object-fit.
http://docs.webplatform.org/wiki/css/properties/object-fit
Browser support is still somewhat lacking (http://caniuse.com/#feat=object-fit) - currently works to some extent in most browsers except Microsoft - but given time i...