is iterative better than recursive?
234831
The fact is that recursion is rarely the most efficient approach to solving a problem, and iteration is almost always more efficient. This is because there is usually more overhead associated with making recursive calls due to the fact that the call stack is so heavily used during recursion.
1045098
Python is faster than R, when the number of iterations is less than 1000. Below 100 steps, python is up to 8 times faster than R, while if the number of steps is higher than 1000, R beats Python when using lapply function!
651386
In general, bitwise operation are always faster then any counterpart but unless what you're doing is the bottle neck of an critical software, I wouldn't recommends using it for no reason other than that one.
1057909
DFS is not guaranteed to find an optimal path; iterative deepening is. DFS may explore the entire graph before finding the target node; iterative deepening only does this if the distance between the start and end node is the maximum in the graph. ... BFS uses O(bd) memory, while iterative deepening uses only O(d).
281108
It's possible to run BFS recursively without any data structures, but with higher complexity. DFS, as opposed to BFS, uses a stack instead of a queue, and so it can be implemented recursively. Again, note that the above code is iterative, but it's trivial to make it recursive.
44319
['Simple For loop.', 'Enhanced For loop.', 'Iterator.', 'ListIterator.', 'While loop.', 'Iterable.forEach() util.', 'Stream.forEach() util.']
866880
Any use of lists that's required to perform well for insertions with saved iterators will use linked lists. They're a fundamental structure and won't go away.
834292
Iteration is the repeated application of a function or process in which the output of each step is used as the input for the next iteration. ... Any function that has the same type of mathematical object for both its argument and result can be iterated.
1358161
Both merge sort and quicksort employ a common algorithmic paradigm based on recursion. This paradigm, divide-and-conquer, breaks a problem into subproblems that are similar to the original problem, recursively solves the subproblems, and finally combines the solutions to the subproblems to solve the original problem.
213834
Well, the forEach() method doesn't actually return anything (undefined). It simply calls a provided function on each element in your array. This callback is allowed to mutate the calling array. ... The difference is that map() utilizes return values and actually returns a new Array of the same size.
1433348
It is important to note that vector elements are accessed by index while unordered_set elements are accessed by value. This leads to the operation with the greatest difference in time complexity between the two: find. A vector is just a list, and as such, find takes O(n).
128907
An iterator does not make use of local variables, all it needs is iterable to iterate on. A generator may have any number of 'yield' statements. You can implement your own iterator using a python class; a generator does not need a class in python. ... They are also simpler to code than do custom iterator.
902972
Procedural programming uses a very detailed list of instructions to tell the computer what to do step by step. This approach uses iteration to repeat a series of steps as often as needed. Functional programming is an approach to problem solving that treats every computation as a mathematical function.
1025410
The Halting Problem. Therefore HALT is recursively enumerable since it is accepted by U. The essence of the Halting problem is that HALT, which is recursively enumerable, or semi-decidable, is not recursive, i.e., not decidable.
1395419
A language is recursively enumerable if there is an algorithm that spits out all the strings in that language (in any order), and those strings only. A language is not recursively enumerable precisely when such an algorithm doesn't exist.
245572
The array_merge_recursive() function merges one or more arrays into one array. The difference between this function and the array_merge() function is when two or more array elements have the same key. Instead of override the keys, the array_merge_recursive() function makes the value as an array.
1394855
Regular functions return only one, single value (or nothing). Generators can return (“yield”) multiple values, one after another, on-demand. They work great with iterables, allowing to create data streams with ease.