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What is the meaning of “$” sign in JavaScript

In the following JavaScript code there is a dollar ( $ ) sign. What does it mean? 7 Answers ...
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CSS vertical alignment text inside li

I am displaying number of boxes in a row with fix height and width, generated from tags. now I need to align the text in the vertical center. The CSS vertical-align has no impact, maybe I am missing something??? ...
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How to “log in” to a website using Python's Requests module?

I am trying to post a request to log in to a website using the Requests module in Python but its not really working. I'm new to this...so I can't figure out if I should make my Username and Password cookies or some type of HTTP authorization thing I found (??). ...
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JPA OneToMany not deleting child

I have a problem with a simple @OneToMany mapping between a parent and a child entity. All works well, only that child records are not deleted when I remove them from the collection. ...
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Named regular expression group “(?Pregexp)”: what does “P” stand for?

In Python, the (?P<group_name>…) syntax allows one to refer to the matched string through its name: 3 Answers ...
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What is the convention for word separator in Java package names?

How should one separate words in package names? Which of the following are correct? 6 Answers ...
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Spring @PropertySource using YAML

Spring Boot allows us to replace our application.properties files with YAML equivalents. However I seem to hit a snag with my tests. If I annotate my TestConfiguration (a simple Java config), it is expecting a properties file. ...
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How do you debug MySQL stored procedures?

My current process for debugging stored procedures is very simple. I create a table called "debug" where I insert variable values from the stored procedure as it runs. This allows me to see the value of any variable at a given point in the script, but is there a better way to debug MySQL stored proc...
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Building a complete online payment gateway like Paypal [closed]

So this question isn't about integrating an existing payment gateway into my site. This is more of a architectural question. ...
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Doing a cleanup action just before Node.js exits

I want to tell Node.js to always do something just before it exits, for whatever reason — Ctrl + C , an exception, or any other reason. ...