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foreach is usually used in place of a standard for loop statement. Unlike other for loop constructs, however, foreach loops [1] usually maintain no explicit counter: they essentially say "do this to everything in this set", rather than "do this x times". This avoids potential off-by-one errors and makes code simpler to read.
The default ordering is in ascending order, to reverse the order, the OrderByDescending operator is to be used. ThenBy and ThenByDescending specifies subsequent ordering of the elements. The function to extract the key value from the object is specified by the user as a delegate. Reverse The Reverse operator reverses a collection. GroupBy
The foreach statement is derived from the for statement and makes use of a certain pattern described in C#'s language specification in order to obtain and use an enumerator of elements to iterate over. Each item in the given collection will be returned and reachable in the context of the code block.
Comparison of programming languages; General comparison; Assignment; Basic syntax; Basic instructions; Comments; Control flow Foreach loops; While loops; For loops
However, the foreach statement in C# can operate on any object providing such a method, even if it does not implement IEnumerable (duck typing). [17]: 89 Both interfaces were expanded into generic versions in .NET 2.0. The following shows a simple use of iterators in C# 2.0:
The order of operations, that is, the order in which the operations in an expression are usually performed, results from a convention adopted throughout mathematics, science, technology and many computer programming languages. It is summarized as: [2] [5] Parentheses; Exponentiation; Multiplication and division; Addition and subtraction
Where func receives as arguments the result of the previous operation (or the initial value on the first iteration); the current item; the current item's index or key; and a reference to the obj: Clojure (reduce func initval list) (reduce func initval (reverse list)) (reduce func list) (reduce func (reverse list)) See also clojure.core.reducers ...
pull() { highest = list.get_first_element() foreach node in list { if highest.priority < node.priority { highest = node } } list.remove(highest) return highest } In another case, one can keep all the elements in a priority sorted list ( O (n) insertion sort time), whenever the highest-priority element is requested, the first one in the list can ...