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Using Kafka as a (CQRS) Eventstore. Good idea?
... events in the stream. Each Kafka topic consists of one or more partitions and each partition is stored as a directory on the file system. There will also be pressure from ZooKeeper as the number of znodes increases.
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ES6 class variable alternatives
...many of us are using the following pattern in frameworks to create classes and class variables, which is comfy:
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Exclude folder from search but not from the project list
...fy Source Root by going to Settings > Project Settings > Directories and adding additional directories.
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What is the significance of initializing direction arrays below with given values when developing ch
I am new to competitive programming, and I noticed frequently, many of the great coders have these four lines in their code (particularly in those involving arrays):
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How can I avoid running ActiveRecord callbacks?
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This solution is Rails 2 only.
I just investigated this and I think I have a solution. There are two ActiveRecord private methods that you can use:
update_without_callbacks
create_without_callbacks
You're going to have to use send to call these methods. examples:
p = Person.ne...
Parsing command-line arguments in C?
... by word, or character by character in C. It has to be able to read in command line options -l -w -i or -- ...
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what exactly is device pixel ratio?
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Short answer
The device pixel ratio is the ratio between physical pixels and logical pixels. For instance, the iPhone 4 and iPhone 4S report a device pixel ratio of 2, because the physical linear resolution is double the logical linear resolution.
Physical resolution: 960 x 640
Logical resolutio...
Is it secure to store passwords as environment variables (rather than as plain text) in config files
I work on a few apps in rails, django (and a little bit of php), and one of the things that I started doing in some of them is storing database and other passwords as environment variables rather than plain text in certain config files (or in settings.py, for django apps).
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Windows 7 SDK installation failure
...em to be completely unable to install the Windows 7 SDK onto my machine, and the only solution I've found on the web is to make a swathe of registry changes. I've done this - still no success.
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How to check if element has any children in Javascript?
... (as opposed to text nodes, attribute nodes, etc.) on all modern browsers (and IE8 — in fact, even IE6) you can do this: (thank you Florian!)
if (element.children.length > 0) { // Or just `if (element.children.length)`
// It has at least one element as a child
}
That relies on the child...