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How does the Amazon Recommendation feature work?
...on of primary driver items and the identification of affinity items (accessory upsell, cross sell).
Keep in mind the data sources they have to mine...
Purchased shopping carts = real money from real people spent on real items = powerful data and a lot of it.
Items added to carts but aband...
Database sharding vs partitioning
... been reading about scalable architectures recently. In that context, two words that keep on showing up with regards to databases are sharding and partitioning . I looked up descriptions but still ended up confused.
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CSS media queries: max-width OR max-height
...SS media query, is there any way you can specify multiple conditions with "OR" logic?
3 Answers
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Relational table naming convention [closed]
...ct and would like to get my table- and column names right from the start. For example I've always used plural in table names but recently learned singular is correct.
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Is there a Python equivalent of the C# null-coalescing operator?
In C# there's a null-coalescing operator (written as ?? ) that allows for easy (short) null checking during assignment:
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What exactly is an Assembly in C# or .NET?
Could you please explain what is an Assembly in C# or .NET?
9 Answers
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How can I check a C# variable is an empty string “” or null? [duplicate]
I am looking for the simplest way to do a check. I have a variable that can be equal to "" or null. Is there just one function that can check if it's not "" or null?
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Open link in new tab or window [duplicate]
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You should add the target="_blank" and rel="noopener noreferrer" in the anchor tag.
For example:
<a target="_blank" rel="noopener noreferrer" href="http://your_url_here.html">Link</a>
Adding rel="noopener noreferrer" is not mandatory, but it's a recommended secur...
Check synchronously if file/directory exists in Node.js
How can I synchronously check, using node.js , if a file or directory exists?
15 Answers
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Git and Mercurial - Compare and Contrast
For a while now I've been using subversion for my personal projects.
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