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Loadbalancing web sockets
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Put a L3 load-balancer that distributes IP packets based on source-IP-port hash to your WebSocket server farm. Since the L3 balancer maintains no state (using hashed source-IP-port) it will scale to wire speed on low-end hardware (say 10GbE). Since the distribution is determi...
ReactJS state vs prop
...it change over time? If not, it probably isn't state.
Can you compute it based on any other state or props in your
component? If so, it's not state.
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How to determine the memory footprint (size) of a variable?
... not definate. It can depend apparently on the php version and possibly on 64/32 bit.
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How to calculate the SVG Path for an arc (of a circle)
...path id="arc1" fill="none" stroke="#446688" stroke-width="20" />
Live demo
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Python int to binary string?
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For a more general philosophy, no language or library will give its user base everything that they desire. If you're working in an environment that doesn't provide exactly what you need, you should be collecting snippets of code as you develop to ensure you never have to write the same thing twice...
How to sort a dataframe by multiple column(s)
... Easy enough: dd[ order(-dd[,4], dd[,1]), ], but can't use with for name-based subsetting.
– Dirk Eddelbuettel
Oct 21 '12 at 14:34
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#pragma pack effect
...it on a 7 byte boundary will hurt performance. But putting it on a 16, 32, 64 or 4096 byte boundary buys you nothing above what the 8 byte boundary already gave you. You'll get the same performance from the CPU, while getting much worse cache utilization for the reasons outlined in that post.
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Is there a limit to the length of HTML attributes?
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HTML5 is not an SGML-based language.
– William Brendel
Sep 30 '09 at 5:03
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Hiding user input on terminal in Linux script
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I've got it. My FreeBSD test was based on the code copied and pasted from your original mistaken edit of lesmana's post, which contains one important difference: you had been passing read a -d ''. When I retried it later on Linux I used the reposted version....
What is the difference between instanceof and Class.isAssignableFrom(…)?
... performance:
isInstance
instanceof (+ 0.5%)
isAssignableFrom (+ 2.7%)
Based on a benchmark of 2000 iterations on JAVA 8 Windows x64, with 20 warmup iterations.
In theory
Using a soft like bytecode viewer we can translate each operator into bytecode.
In the context of:
package foo;
public c...