enumerable

I'm building a widget to show medal counts for the Olympics. I have a collection of "country" objects, where each has a "name" attribute, and "gold", "silver", "bronze" for medal counts. List should be sorted: 1. First by total medal count 2. If same medals, sub-sort by type (gold > silver > bronze, ie. two golds > 1 gold + 1 silver) 3. If same medals and type, sub-sort alphabetically I'm doing this in ruby, but I suppose the language doesn't matter. I did figure out a solution, but if feels like there must be a much more elegant way to do it. Here's what I did: Create a virtual attribute with

According ApiDock , the Ruby method Enumerable#each_with_object is deprecated. Unless it's mistaken (saying "deprecated on the latest stable version of Rails" makes me suspicious that maybe it's Rails' monkey-patching that's deprecated), why is it deprecated? Well, that seems a bit weird. Even Agile Rails writes somewhere : "The Ruby 1.9 each_with_object method was found to be so handy that the Rails crew backported it to Ruby 1.8 for you". Seems like an error in apidock ? I don't see any reason why it would be :/ sawa This is rather an answer to a denial of the presupposition of your question

Before my re-entry in JavaScript (and related) I've done lots of ActionScript 3 and there they had a Dictionary object that had weak keys just like the upcoming WeakMap; but the AS3 version still was enumerable like a regular generic object while the WeakMap specifically has no .keys() or .values() . The AS3 version allowed us to rig some really interesting and usefull constructs but I feel the JS version is somewhat limited. Why is that? If the Flash VM could do it then what is keeping browsers from doing same? I read how it would be 'non-deterministic' but that is sort of the point right?

Enumerability is one of the three attributes of a property: writability, enumerability, and configurability. My questions are: What are the benefit of making properties non-enumerable in JavaScript? I know we are hiding the property by making them non-enumerable, but what are the benefit of property hiding? Can we access non-enumerable properties? If yes, then what is the benefit of making them non-enumerable? Are all predefined properties of Objects set as non-enumerable? Such as the case of Array's pop and push properties being non-enumerable? I think the main benefit is to be able to

I want to do something simple and straightforward, like min(5,10) , or Math.max(4,7) . Are there functions to this effect in Ruby? theIV You can do [5, 10].min or [4, 7].max They come from the Enumerable module , so anything that includes Enumerable will have those methods available. v2.4 introduces own Array#min and Array#max , which are way faster than Enumerable's methods because they skip calling #each . EDIT @nicholasklick mentions another option, Enumerable#minmax , but this time returning an array of [min, max] . [4, 5, 7, 10].minmax => [4, 10] Diego Dias You can use [5,10].min or [4,7]

I often find myself checking if some value belongs to some set. As I understand, people normally use Enumerable#member? for this. end_index = ['.', ','].member?(word[-1]) ? -3 : -2 However, this feels a little less elegant than most of things in Ruby. I'd rather write this code as end_index = word[-1].is_in?('.', ',') ? -3 : -2 but I fail to find such method. Does it even exist? If not, any ideas as to why? Vasiliy Ermolovich Not in ruby but in ActiveSupport : characters = ["Konata", "Kagami", "Tsukasa"] "Konata".in?(characters) # => true You can easily define it along this line: class Object

I was reading an article on MSDN Magazine about using the Enumerable class in LINQ to generate a random array. The article uses VB.NET and I'm not immediately sure what the equivalent is in C#: Dim rnd As New System.Random() Dim numbers = Enumerable.Range(1, 100). _ OrderBy(Function() rnd.Next) The Developer Fusion VB.Net to C# converter says that the equivalent C# code is: System.Random rnd = new System.Random(); IEnumerable<int> numbers = Enumerable.Range(1, 100).OrderBy(r => rnd.Next()); For future reference, they also have a C# to VB.Net converter . There are several other tools available