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Ruby Arrays: select(), collect(), and map()
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edited Oct 23 '18 at 21:01
SgtPooki
8,87155 gold badges2929 silver badges4040 bronze badges
answered M...
new DateTime() vs default(DateTime)
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206
No, they are identical.
default(), for any value type (DateTime is a value type) will always c...
Rails mapping array of hashes onto single hash
...g a method call between each element of it.
For example [1, 2, 3].reduce(0, :+) is like saying 0 + 1 + 2 + 3 and gives 6.
In our case we do something similar, but with the merge function, which merges two hashes.
[{:a => 1}, {:b => 2}, {:c => 3}].reduce({}, :merge)
is {}.merge({:a =&g...
Build.scala, % and %% symbols meaning
...%%:
val appDependencies = Seq(
"org.scala-tools" % "scala-stm_2.9.1" % "0.3"
)
Assuming the scalaVersion for your build is 2.9.1, the following is identical:
val appDependencies = Seq(
"org.scala-tools" %% "scala-stm" % "0.3"
)
As you can see above, if you use %%, you don't have to sp...
Move an item inside a list?
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answered Jul 3 '10 at 23:15
David ZDavid Z
111k2323 gold badges218218 silver badges256256 bronze badges
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Fade/dissolve when changing UIImageView's image
...CATransition *transition = [CATransition animation];
transition.duration = 0.25;
transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
transition.type = kCATransitionFade;
transition.delegate = self;
[self.view.layer addAnimation:transition forKey:...
How do I position one image on top of another in HTML?
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RegEx to find two or more consecutive chars
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– Alexander Mills
Sep 6 '18 at 21:09
16
Alexander, just to clear few things: {2} means that the...
jQuery show for 5 seconds then hide
...n use .delay() before an animation, like this:
$("#myElem").show().delay(5000).fadeOut();
If it's not an animation, use setTimeout() directly, like this:
$("#myElem").show();
setTimeout(function() { $("#myElem").hide(); }, 5000);
You do the second because .hide() wouldn't normally be on the an...
Find commit by hash SHA in Git
...ind a commit in Git by a given hash, SHA. For example, if I have the "a2c25061" hash, and I need to get the author and the committer of this commit.
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