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Hex representation of a color with alpha channel?

...255, 0, 0, 0.5) would be 50% transparent red. RGB channels are 0-255 or 0%-100%, alpha is 0-1. In CSS 4*, you can specify the alpha channel using the 7th and 8th characters of an 8 digit hex colour, or 4th character of a 4 digit hex colour (see CSS Level 4 spec*) As of May 2019, >80% of users c...
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Is optimisation level -O3 dangerous in g++?

...ated. Under certain circumstances (e.g. on a cpu with exceptionally small L1 instruction cache) this can cause a slowdown due to all the code of e.g. some inner loop now not fitting anymore into L1I. Generally gcc tries quite hard to not to generate so much code, but since it usually optimizes the g...
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How can I click a button behind a transparent UIView?

...ller with one sub view. the subview takes up the center of the screen with 100 px margins on all sides. We then add a bunch of little stuff to click on inside that subview. We are only using the subview to take advantage of the new frame ( x=0, y=0 inside the subview is actually 100,100 in the paren...
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Is it possible to run JavaFX applications on iOS, Android or Windows Phone 8?

... 61 Background Invariant's answer is a good resource for how everything was started and what was th...
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How do you discover model attributes in Rails?

... | edited Sep 2 '13 at 8:14 Ian Vaughan 17k1111 gold badges5252 silver badges6868 bronze badges ...
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What is the relationship between the docker host OS and the container base image OS?

...ocker that I can get my hands on I see that I can install Docker on Ubuntu 12.04 (for example) and then I can install a Fedora container or a different version of ubuntu? (there is an example where the user installed busybox in the container.) ...
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How to get the parent dir location

this code is get the templates/blog1/page.html in b.py: 11 Answers 11 ...
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@Basic(optional = false) vs @Column(nullable = false) in JPA

... answered May 24 '10 at 19:52 Pascal ThiventPascal Thivent 524k126126 gold badges10121012 silver badges10991099 bronze badges ...
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querySelector, wildcard element match?

... answered Jan 3 '12 at 15:19 JaredMcAteerJaredMcAteer 15.7k44 gold badges4141 silver badges5858 bronze badges ...
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Retrieving the text of the selected in element

... 12 Answers 12 Active ...