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How to compare two colors for similarity/difference
... You can find the conversion formulas here: brucelindbloom.com/index.html?Equations.html
– Guillermo Gutiérrez
Nov 14 '13 at 19:36
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What is “above-the-fold content” in Google Pagespeed?
...The reasoning behind putting the CSS for the ATF content directly into the HTML reflects their research on mobile data performance showing that if the CSS isn't there, it won't get loaded soon enough to be within the first second.
They also provide links to tools that may be able to automate some o...
Quick-and-dirty way to ensure only one instance of a shell script is running at a time
...command B invokes a subshell for command A. Documented at tldp.org/LDP/abs/html/subshells.html. I am still not sure about the timing of invocation of the subshell and command B.
– Dr. Jan-Philip Gehrcke
Aug 1 '13 at 13:58
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API pagination best practices
...e the Link header field specified in RFC 5988 (section 5) : tools.ietf.org/html/rfc5988#page-6
– Anthony F
Oct 21 '14 at 16:28
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What is the purpose of “!” and “?” at the end of method names?
...the case. For example, Ruby Array#concat docs.ruby-lang.org/en/2.0.0/Array.html#method-i-concat. Where you can get burnt badly is something like MyActiveRecordModel.column_names.concat(...). Instead you must clone it before doing the concat.
– wintondeshong
Aug...
MySql Table Insert if not exist otherwise update
... MySQL performs an [UPDATE`](http://dev.mysql.com/doc/refman/5.7/en/update.html) of the old row...
The ON DUPLICATE KEY UPDATE clause can contain multiple column assignments, separated by commas.
With ON DUPLICATE KEY UPDATE, the affected-rows value per row is 1 if the row is inserted as a...
What does !important mean in CSS?
...ing a finger in the pie.
References:
http://www.w3.org/TR/CSS2/cascade.html#cascade
https://russmaxdesign.github.io/maxdesign-slides/02-css/207-css-cascade.html
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Android Location Providers - GPS or Network Provider?
...Official site : http://developer.android.com/google/play-services/location.html
Fused location provider example:
GIT : https://github.com/kpbird/fused-location-provider-example
http://blog.lemberg.co.uk/fused-location-provider
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What's the advantage of Logic-less template (such as mustache)?
...us presentation layers. If you want similar data to be presented as JSON, HTML, or XML, you shouldn't twist the data 100% in the HTML template. That would leave the JSON and XML to have their own twisting display logic. You're centralizing 80% of the display logic in the controller, and embedding...
Which is the fastest algorithm to find prime numbers?
...most modern results until now on the
web, at http://math.crg4.com/primes.html, the best results of a huge
search domain.
See here for more info:
http://primes.utm.edu/prove/prove2_3.html and http://forums.nvidia.com/index.php?showtopic=70483
If you just need a way to generate very big prime n...