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Convert RGB to RGBA over white
... @templatetypedef: Converting te lowest component to alpha is scaling from the range 0..255 to 0..1, and inverting. Using 1.0 - 152 / 255 would also work. Converting the color components is simply scaling from n..255 to 0..255 where n is the lowest component.
– Guffa
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How do I use .toLocaleTimeString() without displaying seconds?
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DO NOT parse the string returned from toLocaleTimeString. I had been for a few years without any problem. But then today I noticed it was not working. Turns out there are special unicode characters (e.g. 0x200E, a left-to-right mark) which cannot be proce...
Prototypical inheritance - writing up [duplicate]
So I have these 2 examples, from javascript.info:
2 Answers
2
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Import SQL dump into PostgreSQL database
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@Dazz You have to do this command from your command prompt (Start -> Run -> cmd) , not from the postgres prompt.
– Jacob
Jul 27 '11 at 10:48
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How to correctly save instance state of Fragments in back stack?
...State first */
/* However, if it was not, it stays in the instance from the last onDestroyView() and we don't want to overwrite it */
if(savedInstanceState != null && savedState == null) {
savedState = savedInstanceState.getBundle(App.STAV);
}
if(s...
Is there a Python function to determine which quarter of the year a date is in?
...for first quarter, 1 for second quarter, etc -- add 1 if you need to count from 1 instead;-).
Originally two answers, multiply upvoted and even originally accepted (both currently deleted), were buggy -- not doing the -1 before the division, and dividing by 4 instead of 3. Since .month goes 1 to...
Conditionally use 32/64 bit reference when building in Visual Studio
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The solution works for the default configuration, but not from my testing not if you change the configuration from the configuration from the Visual Studio (2012 in my case) Solution Configuration dropdown list.
– Sarah Weinberger
Jul 22 '13 at...
How to pipe list of files returned by find command to cat to view all the files
...ys the contents of all those files) and basically need to grep something from these files.
15 Answers
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Relative URLs in WordPress
...oper websites, it was always a quick hack, written by hackers who (clearly from the quotes here) haven't thought or looked outside the box. The only way you can move a website is if it CORRECTLY uses relative and/or root relative URLs. Absolute URLs absolutely prevent it.
– Haq...
boost Composite keys - C/C++ - 清泛网 - 专注C/C++及内核技术
...osite key depends on all of its elements, it is impossible to calculate it from partial information.
Advanced features of Boost.MultiIndex key extractors
The Key Extractor concept allows the same object to extract keys from several different types, possibly through suitably defined overloads of op...