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Storing JSON in database vs. having a new column for each key
I am implementing the following model for storing user related data in my table - I have 2 columns - uid (primary key) and a meta column which stores other data about the user in JSON format.
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How to force the browser to reload cached CSS/JS files?
I have noticed that some browsers (in particular, Firefox and Opera) are very zealous in using cached copies of .css and .js files, even between browser sessions. This leads to a problem when you update one of these files but the user's browser keeps on using the cached copy.
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How to make git mark a deleted and a new file as a file move?
...additionally, for moves around directories, you may need to:
cd to the top of that directory structure.
Run git add -A .
Run git status to verify that the "new file" is now a "renamed" file
If git status still shows "new file" and not "renamed" you need to follow Hank Gay’s advice and do the m...
What is an efficient way to implement a singleton pattern in Java? [closed]
What is an efficient way to implement a singleton pattern in Java?
29 Answers
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How to add elements of a Java8 stream into an existing List
...y an existing collection.
The reason is that collectors are designed to support parallelism, even over collections that aren't thread-safe. The way they do this is to have each thread operate independently on its own collection of intermediate results. The way each thread gets its own collection is...
What is unit testing? [closed]
I saw many questions asking 'how' to unit test in a specific language, but no question asking 'what', 'why', and 'when'.
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Efficiently convert rows to columns in sql server
...or an efficient way to convert rows to columns in SQL server, I heard that PIVOT is not very fast, and I need to deal with lot of records.
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How does a language expand itself? [closed]
I am learning C++ and I've just started learning about some of Qt 's capabilities to code GUI programs. I asked myself the following question:
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How to create the perfect OOP application [closed]
Recently I was trying for a company ‘x’. They sent me some set of questions and told me to solve only one.
12 Answers
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How to find all serial devices (ttyS, ttyUSB, ..) on Linux without opening them?
What is the proper way to get a list of all available serial ports/devices on a Linux system?
12 Answers
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