erase

问题 I'm writing a Ruby application that will need to handle a user's enterprise password. I'd like to minimize the time the password is in memory to reduce the likelihood of the password being exposed. In a native language, I would directly erase the data. In C#, I would use the SecureString class. In Java, I'd use char[]. But the best that I can find for Ruby is an old feature request that seems dead. What is the standard for securely storing and erasing passwords from memory in Ruby? Is there a

问题 My map is defined as such: map<string, LocationStruct> myLocations; where the key is a time string I am only keeping 40 items in this map, and would like to drop off the last item in the map when i reach 40 items. I know that i can't do myLocations.erase(myLocations.end()) , so how do i go about this? I do intend for the last item in the map to be the oldest, and therefore FIFO. The data will be coming in rather quick (about 20Hz), so i'm hoping that the map can keep up with it. I do need to

问题 So I wanted to do thing like mentioned above. And I came up with a brilliant idea when it comes to a usual iteration, third part of the method. But I don't know how to deal with the problem when I have a loop inside a loop. And yes, I know it's caused by skipping elements while erasing. int Collision::missleCollision(vector <Missle*> &missle_vector, vector <Enemy*> &enemy_vector, vector <Obstacle*> &obstacle_vector, bool G) { int hit=0; for (auto it=missle_vector.begin(); it!=missle_vector

问题 So I've been struggling with this for a better part of a day. Suppose I have a custom ImageView that I want to overlay over a background View (both within a RelativeLayout), which when touched, it erases portions of the View's source bitmap like an erase tool in MS Paint, exposing the View below it. I've checked pretty much all of the threads (like this one) and they suggest to use PorterDuff SRC Mode in the Paint object as well as creating a Canvas out out the ARGB_8888 shadow copy of the

问题 I am trying to develop an application and i want the sprites to erase once they reach the end. I am using arraylist to handle my sprites on a canvas. I want the sprites to erase themselves from the canvas and from the arraylist once their x<0 (outside of the canvas) Please help me asap. Thanks This is my code so far for the erase command: for(Sprite sprite : rockSprites){ sprite.x -=10; if (Rect.intersects(sprite.dst, die)) { rockSprites.remove(this); currentAmountOfSprites--; try { Thread

问题 Very simple: I have the following code and the method erase is not working. I do not see any problem there because if I go to http://www.cplusplus.com/reference/list/list/erase/ , syntax is: iterator erase (iterator position); list<pair<string,int>> l0 { { "name1", 20 }, { "name2", 30 }, { "name3", 40 } }; for( auto &it : l0 ) l0 . erase( it ); May there be a problem that there is a list of pair<string,int> and not a list of a basic data types? EDIT: The problem is that the code is not

问题 What is the code to reset an array to its default state so that all the elements are erased? 回答1: you can try Array.Clear method : Array.Clear(myArray, 0, myArray.Length) that will revert value of each array element to default ( 0 , false , or Nothing depending on the element type as described in the link above). Another option is to use Erase Erase myArray that will turn myArray variable to Nothing . 回答2: You can use Erase . Erase YourArray 回答3: System.Array.Clear(Array, 0, Array.length) You

问题 I need to implement the overloaded the assignment operator in a class so the vector.erase function will work properly as proposed in the answers to "vector::erase with pointer member". I have implemented also a copy constructor for the same purpose. By the following implementation of the operator I get the warning : 'Player::operator=' : recursive on all control paths, function will cause runtime stack overflow. Apparently the implementation of Player::operator= is incorrect. What is the

问题 I'm trying to remove items from a C++ linked list using erase and a list iterator: #include <iostream> #include <string> #include <list> class Item { public: Item() {} ~Item() {} }; typedef std::list<Item> list_item_t; int main(int argc, const char *argv[]) { // create a list and add items list_item_t newlist; for ( int i = 0 ; i < 10 ; ++i ) { Item temp; newlist.push_back(temp); std::cout << "added item #" << i << std::endl; } // delete some items int count = 0; list_item_t::iterator it; for

问题 Just want to remove duplicates. Pool is vector<pair<string, int>> but I seem to miss some elements at the start of the vector somehow. Can anyone verify the logic of the removal? Thanks :) Pool Master::eliminateDuplicates(Pool generation) { for(int i = 0; i < generation.size(); i++) { string current = generation.at(i).first; for(int j = i; j < generation.size(); j++) { if(j == i) { continue; } else { string temp = generation.at(j).first; if(current.compare(temp) == 0) { Pool::iterator iter =