IT Nursery
I’m trying to set the background color of a View (in this case a Button). I use this code: // set the background to green v.setBackgroundColor(0x0000FF00 ); v.invalidate(); It...
I have a Python set that contains objects with __hash__ and __eq__ methods in order to make certain no duplicates are included in the collection. I need to json...
Recently I noticed that when I am converting a list to set the order of elements is changed and is sorted by character. Consider this example: x=[1,2,20,6,210] print(x) #...
I’ve been trying to set the value of a hidden field in a form using jQuery, but without success. Here is a sample code that explains the problem. If...
How do I pick a random element from a set? I’m particularly interested in picking a random element from a HashSet or a LinkedHashSet, in Java. Solutions for other...
Is there any way to map/reduce/filter/etc a Set in JavaScript or will I have to write my own? Here’s some sensible Set.prototype extensions Set.prototype.map = function map(f) { var...
Assume that S and T are assigned sets. Without using the join operator |, how can I find the union of the two sets? This, for example, finds the...
For example, I am currently doing this: Set<String> setOfTopicAuthors = .... List<String> list = Arrays.asList( setOfTopicAuthors.toArray( new String...
Does a Java Set retain order? A method is returning a Set to me and supposedly the data is ordered but iterating over the Set, the data is unordered....
I’ve seen people say that set objects in python have O(1) membership-checking. How are they implemented internally to allow this? What sort of data structure does it use? What...