We can return true/false true for continue, false for break Continue: collect([1,2,3,4])->each(function ($item){ if ($item === 2) { return true; } echo $item; }); Output: 1 3 4 Break: collect([1,2,3,4])->each(function ($item){ if ($item === 2) { return false; } echo $item; }); Output: 1
You could try to check the return value of addAll. It will return true whenever the list has been modified, so try this: List<Object> list = new ArrayList<>(); // ret unused, otherwise it doesn’t compile boolean ret = list.addAll(method1()) || list.addAll(method2()) || list.addAll(method3()) || list.addAll(method4()) || list.addAll(method5()) || list.addAll(method6()); return list; Because of lazy evaluation, … Read more
var d3 = d1.Concat(d2).ToDictionary(x => x.Key, x => x.Value);
While you could initialize a dictionary with collection initializers, it’s quite cumbersome. Especially for something that’s supposed to be syntactic sugar. Dictionary initializers are much cleaner: var myDict = new Dictionary<int, string> { [1] = “Pankaj”, [2] = “Pankaj”, [3] = “Pankaj” }; More importantly these initializers aren’t just for dictionaries, they can be used … Read more
Really all of these types inherit IEnumerable. You can check only for it: bool IsEnumerableType(Type type) { return (type.GetInterface(nameof(IEnumerable)) != null); } or if you really need to check for ICollection: bool IsCollectionType(Type type) { return (type.GetInterface(nameof(ICollection)) != null); } Look at “Syntax” part: List<T> IList ICollection If you need to exclude strings (which are … Read more
I know “for” is not what you want, but it’s simple and clear: for x in b: a.remove(x) Or if members of b might not be in a then use: for x in b: if x in a: a.remove(x)
If you’ve already checked that the keys are the same, you can just use: var dict3 = dict2.Where(entry => dict1[entry.Key] != entry.Value) .ToDictionary(entry => entry.Key, entry => entry.Value); To explain, this will: Iterate over the key/value pairs in dict2 For each entry, look up the value in dict1 and filter out any entries where the … Read more
You are out of luck here. IList<T> doesn’t implement IReadOnlyList<T>. List<T> does implement both interfaces, but I think that’s not what you want. However, you can use LINQ: The Count() extension method internally checks whether the instance in fact is a collection and then uses the Count property. The ElementAt() extension method internally checks whether … Read more
Your general approach is perfectly fine MVVM, having a ViewModel exposing a collection of other ViewModels is a very common scenario, which I use all over the place. I would not recommend exposing items directly in a ViewModel, like nicodemus13 said, as you end up with your view binding to models without ViewModels in between … Read more
The assertEquals(Collection<?> actual, Collection<?> expected) documentation says: Asserts that two collections contain the same elements in the same order. If they do not, an AssertionError is thrown. Thus the content of the collections will be compared which, in case both the collections are empty, are equal.