...perations(Stream operations) that looks similar to iterators from Iterable Interface. Just copy paste below statement to your code and rename the HashMap variable from hm to your HashMap variable to print out key-value pair. HashMap<Integer,Integer> hm = new HashMap<Integer, Integer>(...

... standard nowadays to use .() instead of list() and setDT() to convert a data.frame to data.table. So in one step setDT(df)[, .N, by = .(year, month)]. – sindri_baldur Sep 27 '19 at 11:33 ...

...os definitions, which were not present in the book, which as others have pointed out changes the meaning. Except when making a change in an attempt to understand the code, you should leave it alone until you do understand it. You can only safely modify code you understand. This was probably just ...

...b -> b) -> b -> (a -> b) -> Maybe a -> b. A confusing point: you may hear that when you omit the forall from a type it is actually still implicitly there. (from Norman's answer: "normally these languages omit the forall from polymorphic types"). This claim is correct, but it refer...

...i, o, u, x, X, a, A, e, E, f, F, g, and G conversions, the converted value is padded on the left with zeros rather than blanks. If the 0 and - flags both appear, the 0 flag is ignored. If a precision is given with a numeric c...

...ou control the rest of the application you may get the information you are interested in. Apart from that you can use a profiler to get the information or you could use the profiling api to get the information in code. But that won't be easy to use I think. See Find out how much memory is being u...

...t of chatter about this : Here are other, similar questions : Detect internet Connection using Java How do I test the availability of the internet in Java? And even a reported bug on this same matter : http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4921816 Part 1 : A reproducible exam...

...lue will be faster. ContainsKey uses the same check as TryGetValue, which internally refers to the actual entry location. The Item property actually has nearly identical code functionality as TryGetValue, except that it will throw an exception instead of returning false. Using ContainsKey followe...

...l value of the parameter of the method you're calling. Now the important point is that the value is a reference for reference types - a way of getting to an object (or null). Changes to that object will be visible from the caller. However, changing the value of the parameter to refer to a different ...

...of delimited words, and now I want to sort them out in random orders and print the words out with spaces in between. 2 Answ...