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Converting RGB to grayscale/intensity
When converting from RGB to grayscale, it is said that specific weights to channels R, G, and B ought to be applied. These weights are: 0.2989, 0.5870, 0.1140.
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setting an environment variable in virtualenv
...at direnv is probably the better option and implies autoenv is no longer maintained.
Old answer
I wrote autoenv to do exactly this:
https://github.com/kennethreitz/autoenv
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Why should I use Deque over Stack?
...d a Stack data structure for my use case. I should be able to push items into the data structure and I only want to retrieve the last item from the Stack. The JavaDoc for Stack says :
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How to replace all dots in a string using JavaScript
I want to replace all the occurrences of a dot( . ) in a JavaScript string
15 Answers
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Remove blue border from css custom-styled button in Chrome
I'm working on a web page, and I want custom-styled <button> tags. So with CSS, I said: border: none . Now it works perfectly in safari, but in chrome, when I click one of the buttons, it puts an annoying blue border around it. I thought button:active { outline: none } or button:focus { ...
Ruby: What is the easiest way to remove the first element from an array?
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"pop"ing the first element of an Array is called "shift" ("unshift"
being the operation of adding one element
in front of the array).
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Using Server.MapPath in external C# Classes in ASP.NET
I'm trying to get the absolute path of certain files in a C# class. Server.MapPath works great of course for ASPX and their code-behind pages, but that doesn't exist in another class file. I tried HostingEnvironment.MapPath() , but that complains that the relative virtual path isn't allowed. A...
Can I squash commits in Mercurial?
I have a pair of commits that should really be just one. If I was using git, I would use:
8 Answers
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iOS change navigation bar title font and color
....navigationController?.navigationBar.titleTextAttributes =
[NSAttributedString.Key.foregroundColor: UIColor.red,
NSAttributedString.Key.font: UIFont(name: "mplus-1c-regular", size: 21)!]
Edit: Swift 4
self.navigationController?.navigationBar.titleTextAttributes =
[NSAttributedStringKey.foregroun...
S3 - Access-Control-Allow-Origin Header
Did anyone manage to add Access-Control-Allow-Origin to the response headers?
What I need is something like this:
24 Ans...