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Elegant way to invert a map in Scala
... different keys associated with same values. So, if you are interested in knowing all the keys, here's the code:
scala> val m = Map(1 -> "a", 2 -> "b", 4 -> "b")
scala> m.groupBy(_._2).mapValues(_.keys)
res0: Map[String,Iterable[Int]] = Map(b -> Set(2, 4), a -> Set(1))
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html5 localStorage error with Safari: “QUOTA_EXCEEDED_ERR: DOM Exception 22: An attempt was made to
...n my code. Please actually point out the fix to the problem you appear to know about.
– Novocaine
Oct 20 '15 at 8:51
7
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How to prevent browser page caching in Rails
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use:
expires_now()
http://api.rubyonrails.org/classes/ActionController/ConditionalGet.html#method-i-expires_now
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How to intercept click on link in UITextView?
...URL:url];
}
@end
You will need to implement openURL: in your delegate.
Now, to have the application start with your new subclass of UIApplication, locate the file main.m in your project. In this small file that bootstraps your app, there is usually this line:
int retVal = UIApplicationMain(argc...
On logout, clear Activity history stack, preventing “back” button from opening logged-in-only Activi
...esearching this issue and reading all of these StackOverflow threads. I am now newly initiated and I leave here trace of my humble experience to help a future pilgrim.
First, there is no obvious or immediate way to do this per my research (as of September 2012). You'd think you could simple startAc...
What is the difference between a var and val definition in Scala?
...ge the state of that object. At the root of it, however, there was a var.
Now, immutability is a good thing for many reasons. First, if an object doesn't change internal state, you don't have to worry if some other part of your code is changing it. For example:
x = new B(0)
f(x)
if (x.value.value ...
custom listview adapter getView method being called multiple times, and in no coherent order
... ListView to measure a few children out of the adapter at layout time, to know how big it should be. This is what provides ListView with the convertViews you see passed to getView() even before you scroll.
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Is there a working C++ refactoring tool? [closed]
Does anybody know a fully featured refactoring tool for C++ that works reliably with large code bases (some 100.000 lines)?
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How can I see the SQL generated by Sequelize.js?
...lease note that find* was refactored and uses only one options object from now on.. For the latest sequelize version (4) if you want to have the result for only one command:
User.findAll({where: {...}, logging: console.log})
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