What is recursion and when should I use it? - Stack Overflow
Don't use recursion for factorials or Fibonacci numbers. One problem with computer-science textbooks is that they present silly examples of recursion. The typical examples are computing a factorial or computing a Fibonacci sequence. Recursion is a powerful tool, and it's really dumb to use it in either of those cases.
What is the maximum recursion depth, and how to increase it?
It is a guard against a stack overflow, yes. Python (or rather, the CPython implementation) doesn't optimize tail recursion, and unbridled recursion causes stack overflows. You can check the recursion limit with sys.getrecursionlimit: import sys print(sys.getrecursionlimit()) and change the recursion limit with sys.setrecursionlimit:
recursion - Determining complexity for recursive functions (Big O ...
2012年11月20日 · And here the for loop takes n/2 since we're increasing by 2, and the recursion takes n/5 and since the for loop is called recursively, therefore, the time complexity is in (n/5) * (n/2) = n^2/10, due to Asymptotic behavior and worst-case scenario considerations or the upper bound that big O is striving for, we are only interested in the largest ...
recursion - Java recursive Fibonacci sequence - Stack Overflow
Most of the answers are good and explains how the recursion in fibonacci works. Here is an analysis on the three techniques which includes recursion as well: For Loop; Recursion; Memoization; Here is my code to test all three:
performance - Recursion or Iteration? - Stack Overflow
2011年6月24日 · Recursion has a disadvantage that the algorithm that you write using recursion has O(n) space complexity. While iterative aproach have a space complexity of O(1).This is the advantange of using iteration over recursion.
algorithm - What is tail recursion? - Stack Overflow
2008年8月29日 · Tail recursion refers to the recursive call being last in the last logic instruction in the recursive algorithm. Typically in recursion, you have a base-case which is what stops the recursive calls and begins popping the call stack. To use a classic example, though more C-ish than Lisp, the factorial function illustrates tail recursion.
What are the advantages and disadvantages of recursion?
Recursion: A function that calls itself is called as recursive function and this technique is called as recursion. Pros: 1. Reduce unnecessary calling of functions. 2. Through Recursion one can solve problems in easy way while its iterative solution is very big and complex. 3. Extremely useful when applying the same solution. Cons: 1.
Convert recursion to iteration - Stack Overflow
Well, in general, recursion can be mimicked as iteration by simply using a storage variable. Note that recursion and iteration are generally equivalent; one can almost always be converted to the other. A tail-recursive function is very easily converted to an iterative one. Just make the accumulator variable a local one, and iterate instead of ...
algorithm - Understanding recursion - Stack Overflow
2009年4月5日 · Why, yes, recursion can be replaced with iteration, but often recursion is more elegant. Let's talk about trees. In computer science, a tree is a structure made up of nodes , where each node has some number of children that are also nodes, or null.
Real-world examples of recursion - Stack Overflow
2008年9月20日 · Recursion is a technique to keep breaking the problem down into smaller and smaller pieces, until one of those pieces become small enough to be a piece-of-cake. Of course, after you break them up, you then have to "stitch" the results back together in the right order to form a total solution of your original problem.