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Is there a difference between single and double quotes in Java?
Is there a difference between single and double quotes in Java?
4 Answers
4
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How do I use vim registers?
I only know of one instance using registers is via Ctrl R * whereby I paste text from a clipboard.
16 Answers
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jQuery: Performing synchronous AJAX requests
I've done some jQuery in the past, but I am completely stuck on this. I know about the pros and cons of using synchronous ajax calls, but here it will be required.
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Creating a expressjs middleware that accepts parameters
... am trying to create a middleware that can accept parameters. How can this be done?
4 Answers
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How to convert a column number (e.g. 127) into an Excel column (e.g. AA)
How do you convert a numerical number to an Excel column name in C# without using automation getting the value directly from Excel.
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Is there a regular expression to detect a valid regular expression?
Is it possible to detect a valid regular expression with another regular expression? If so please give example code below.
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How to add column if not exists on PostgreSQL?
Question is simple. How to add column x to table y , but only when x column doesn't exist ? I found only solution here how to check if column exists.
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Spring Data JPA find by embedded object property
...ce method signature that will let me find entities with a property of an embedded object in that entity. Does anyone know if this is possible, and if so how?
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Java multiline string
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Stephen Colebourne has created a proposal for adding multi-line strings in Java 7.
Also, Groovy already has support for multi-line strings.
share
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Run a callback only if an attribute has changed in Rails
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Rails 5.1+
class Page < ActiveRecord::Base
before_save :do_something, if: :will_save_change_to_status_id?
private
def do_something
# ...
end
end
The commit that changed ActiveRecord::Dirty is here: https://github.com/rails/rails/commit/16ae3db5a5c...