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Why do we need message brokers like RabbitMQ over a database like PostgreSQL?
... use the disk to temporarily store messages if it runs out of RAM. After 2.0, Rabbit has significantly improved on its RAM usage. Clustering options are also available.
In regards to AMQP, I would say a really cool feature is the "exchange", and the ability for it to route to other exchanges. This...
Which is faster: Stack allocation or Heap allocation
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501
Stack allocation is much faster since all it really does is move the stack pointer.
Using memo...
Why is an int in OCaml only 31 bits?
...pointer dererefences plus one object construction. And you take up almost 20 Byte.
However, the trick is that with so-called immutable value types like integers, you usually don't need all the metadata in the object header: you can just leave all that stuff out, and simply synthesize it (which is V...
Convert datetime object to a String of date only in Python
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508
You can use strftime to help you format your date.
E.g.,
import datetime
t = datetime.datetim...
Using -performSelector: vs. just calling the method
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edited Sep 29 '09 at 18:25
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What is the logic behind the “using” keyword in C++?
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120
In C++11, the using keyword when used for type alias is identical to typedef.
7.1.3.2
A typedef...
How to create a file in memory for user to download, but not through server?
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20 Answers
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Why do Objective-C files use the .m extension?
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470
Today most people would refer to them as "method files", but
"The .m extension originally st...
What's the difference between ISO 8601 and RFC 3339 Date Formats?
ISO 8601 and RFC 3339 seem to be two formats that are common the web. Should I use one over the other? Is one just an extension? Do I really need to care that bad?
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Is there an equivalent to background-size: cover and contain for image elements?
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Solution #1 - The object-fit property (Lacks IE support)
Just set object-fit: cover; on the im...