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Is volatile expensive?
...functions providing additional functionality like getAndSet, compareAndSet etc., so from a performance point of view using it is just useful if you need the added functionality. But I wonder why you refer to the OS here? The functionality is implemented in CPU opcodes directly. And does this imply t...
What is the best Battleship AI?
... about the world (e.g. ships can't overlap, all hit squares must be ships, etc.) you can count how often ships occur at each unexplored position to estimate the likelihood that a ship is sitting there.
This can be visualized as a heat map, where hot spots are more likely to contain ships:
a heat...
How to properly document S4 class slots using Roxygen2?
...escription/details appears to be the same as for functions, methods, data, etc. However, slots and inheritance are their own sort of animal. What is the best practice -- current or planned -- for documenting S4 classes in roxygen2?
...
Using Kafka as a (CQRS) Eventstore. Good idea?
...ng, there is a stream (topic) of events per entity (such as user, product, etc). This way, the current state of an entity can be reconstituted by re-applying all 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. ...
Node.js version on the command line? (not the REPL)
...ut installed node(i.e. node version,v8 version,platform,env variables info etc.)
then just do this.
$ node
> process
process {
title: 'node',
version: 'v6.6.0',
moduleLoadList:
[ 'Binding contextify',
'Binding natives',
'NativeModule events',
'NativeModule util',
...
Add a CSS border on hover without moving the element [duplicate]
...1px to each side. or if you need only for side you can do margin-left:-1px etc.
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Most tricky/useful commands for gdb debugger [closed]
...gt;. This command file can contain gdb commands like breakpoints, options, etc. Useful in case a particular executable needs to be put through successive debug runs using gdb.
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Print second last column/field in awk
...
As a mnemonic, this behavior is the same as C/Java etc. int x = ++i int x = i++, prefix means increment first; postfix means increment later (assignment first).
– Weekend
Dec 11 '19 at 7:20
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How to round the corners of a button
...lidation, controls with borders, dashed borders, circle and hairline views etc.
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How to design a product table for many kinds of product where each product has many parameters
...a blob of attributes that can't be easily queried within SQL; you have to fetch the whole blob back to the application and sort it out there.
Entity-Attribute-Value: One table for Products, and one table that pivots attributes to rows, instead of columns. EAV is not a valid design with respect to t...