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Hidden features of Scala
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trait Functor[F[_]] {
def fmap[A, B](f: A => B, fa: F[A]): F[B]
}
Now, if you have a Functor[List], you can map over lists. If you have a Functor[Tree], you can map over trees. But more importantly, if you have Functor[A] for any A of kind (*->*), you can map a function over A.
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How to send a header using a HTTP request through a curl call?
...lly do. You should not replace internally set headers without
knowing perfectly well what you're doing. Remove an internal header
by giving a replacement without content on the right side of the
colon, as in: -H "Host:".
curl will make sure that each...
int value under 10 convert to string two digit number
...e site (or related site) may have been spreading malicious software. It is now off the list an no longer reported as problematic. Google "SteveX String Formatting" you'll find the search result and you can visit it at your discretion.
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Does adding a duplicate value to a HashSet/HashMap replace the previous value
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ah I get it now. I understood that the key is the element of the Set, but just realized that put() will only override the value, not the key. In this case, it's the same value put alongside the key again, which may or may not be better t...
How to make PowerShell tab completion work like Bash
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It is now possible to get PowerShell to do Bash-style completion, using PSReadline.
Check out blog post Bash-like tab completion in PowerShell.
share
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Send and receive messages through NSNotificationCenter in Objective-C?
...w ios devs who keep the notification listener alive longer than they need. Now with arc you usually don't use dealloc and as a result some may think they don't have to release the listener.
– Vive
Nov 5 '13 at 7:45
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How to add Google Analytics Tracking ID to GitHub Pages
Could be a simple question but I am full of doubts right now about adding Google Analytics Tracking ID to GitHub page .
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What is the difference between Bower and npm?
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npm 3 supports a flat dependency tree now.
– vasa
Nov 21 '15 at 6:55
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show 9 more comments
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How to set the thumbnail image on HTML5 video?
...of_video.png" alt="image" />
/* write your code for the video here */
Now using jQuery play the video and hide the image as
$('img').click(function () {
$(this).hide();
// use the parameters to play the video now..
})
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What does ||= (or-equals) mean in Ruby?
...discussed so often on the Ruby mailing-lists and Ruby blogs that there are now even threads on the Ruby mailing-list whose only purpose is to collect links to all the other threads on the Ruby mailing-list that discuss this issue.
Here's one: The definitive list of ||= (OR Equal) threads and pages
I...