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What is the difference between the HashMap and Map objects in Java?

...eMap instead of HashMap in Foo. I update Foo, changing HashMap to TreeMap. Now, SpecialFoo doesn't compile anymore, because I've broken the contract: Foo used to say it provided HashMaps, but now it's providing TreeMaps instead. So we have to fix SpecialFoo now (and this kind of thing can ripple thr...
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How to suppress Update Links warning?

...ctedly got another: WARNING #2 So, I suppose my testing environment is now pretty much similar to OP's) So far so good, we finally go to VBA Opening Now I'll try all possible options step by step to make the picture clear. I'll share only relevant lines of code for simplicity (complete sample ...
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What is the 'dynamic' type in C# 4.0 used for?

... to tell the compiler that a variable's type can change or that it is not known until runtime. Think of it as being able to interact with an Object without having to cast it. dynamic cust = GetCustomer(); cust.FirstName = "foo"; // works as expected cust.Process(); // works as expected cust.Missing...
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Summarizing multiple columns with dplyr? [duplicate]

...x. I have a data frame with different variables and one grouping variable. Now I want to calculate the mean for each column within each group, using dplyr in R. ...
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how to implement a pop up dialog box in iOS

...isplay a pop up or alert box conveying a message to the user. Does anyone know where I can find more information about this? ...
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Git: “Corrupt loose object”

... And now repeat in English please – Mehdi Mar 23 '16 at 14:01  |  show 5...
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Split string into array of character strings

... This answer does now work if you're using Java 8. See stackoverflow.com/a/22718904/1587046 – Alexis C. Apr 25 '14 at 14:01 ...
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How to detect iPhone 5 (widescreen devices)?

I've just upgraded to XCode 4.5 GM and found out that you can now apply the '4" Retina' size to your view controller in the storyboard. ...
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Simulate limited bandwidth from within Chrome?

...as a whole bunch of HTTP inspection tools. Edit: As of June 2014, Chrome now has the ability to do this natively in DevTools - you'll need Chrome 38 though. The option is accessible from the Network tab via a drop down at the end of the toolbar. ...
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Deleting DataFrame row in Pandas based on column value

... how to do that if we don't know the column name? – Piyush S. Wanare Jul 3 '18 at 13:20 ...