erase-remove-idiom Questions
3
Solved
Will std::remove_if always call the predicate on each element in order (according to the iterator's order) or could it be called out of order?
Here is a toy example of what I would like to do:
vo...
Aurelia asked 8/8, 2016 at 22:48
4
Solved
How to remove first and last character from std::string, I am already doing the following code.
But this code only removes the last character
m_VirtualHostName = m_VirtualHostName.erase(m_Virtual...
Egarton asked 23/5, 2014 at 16:52
3
Solved
Let's say I have std::vector<std::pair<int,Direction>>.
I am trying to use erase-remove_if idiom to remove pairs from the vector.
stopPoints.erase(std::remove_if(stopPoints.begin(),
...
Spoonbill asked 18/8, 2016 at 13:42
1
I've got two vectors:
struct MyData{
double value;
};
std::vector<int> remove_flags = {0, 1, 0, 0, 0, 0, 1, 0};
std::vector<MyData> data = {{},{},{},{},{},{},{},{}};
The remove_flag...
Nannettenanni asked 3/6, 2021 at 20:30
1
Solved
We can erase one element/ entry from a container by the popular erase–remove idiom.
However, many of us would have encountered some problems while applying this idiom:
one can easily get into the...
Ceceliacecil asked 2/7, 2019 at 20:15
1
Solved
Consider the following code (taken from cppreference.com, slightly adapted):
#include <algorithm>
#include <string>
#include <iostream>
#include <cctype>
int main()
{
std...
Hooten asked 11/5, 2019 at 14:5
3
Solved
Is it possible to access the std::for_each iterator, so I can erase the current element from an std::list using a lambda (as below)
typedef std::shared_ptr<IEvent> EventPtr;
std::list<Eve...
Sunburst asked 28/6, 2012 at 14:10
1
Solved
My aim was to try a solution for this question:Removing all empty elements in a vector from end. using erase-remove idiom.
The idea is to remove all elements starting from the end which are empty ...
Capello asked 1/5, 2018 at 7:51
2
Solved
I need to erase all elements from a vector which fulfill a certain criteria.
My first approach would be to loop through the vector and call vector::erase on all elements which fulfill the criteria...
Windbreak asked 7/8, 2017 at 16:4
3
Solved
I'm creating an API which users will call to remove items from an internal vector. They will pass in criteria to search the vector for elements to remove. I'd like my API to return a boolean for if...
Gonick asked 24/5, 2017 at 21:28
4
Solved
Ok, I expect I've made a dumb mistake here. I have a list of DisplayDevice3d and each DisplayDevice3d contains a list of DisplayMode3d. I want to remove all items from the list of DisplayDevice3d t...
Chaparajos asked 18/12, 2010 at 15:22
2
Solved
The task of removing elements with a certain property from a std::vector or other container lends itself to a functional style implementation: Why bother with loops, memory deallocation and moving ...
Electrosurgery asked 3/4, 2016 at 10:55
4
Solved
vector<int> myVector;
and lets say the values in the vector are this (in this order):
5 9 2 8 0 7
If I wanted to erase the element that contains the value of "8", I think I would d...
Sew asked 2/8, 2010 at 5:27
4
Solved
I have code to remove all elements from a std::vector<int> that are less than some int limit. I've written some functions that partially apply lambdas:
auto less_than_limit = [](int limit) {...
Naaman asked 12/1, 2016 at 17:52
2
Solved
Consider the following scenario:
bool is_odd(int i)
{
return (i % 2) != 0;
}
int main()
{
// ignore the method of vector initialization below.
// assume C++11 is not to be used.
std::vector<...
Subbasement asked 17/12, 2015 at 8:37
1
Solved
Removing items from a collection in the STL requires a technique used so often that is has become an idiom: the erase-remove-idiom
One of the most common usages of this idiom is to remove an item ...
Oberhausen asked 4/11, 2015 at 13:48
1
Solved
#include <vector>
#include <algorithm>
using namespace std;
int main() {
vector<int> a = {1,2,3,7,1,5,4};
vector<int> b = {6,7,4,3,3,1,7};
a.erase(remove(a.begin(),a.en...
Estuarine asked 25/2, 2015 at 14:52
1
Solved
Given
std::vector<double> a;
std::vector<int> ind;
where ind is 1sorted in ascending order.
I want to do the equivalent of the following:
for (auto it=ind.rbegin();it!=ind.rend();...
Labbe asked 16/2, 2015 at 19:11
1
Solved
I have a std::vector<std::shared_ptr<Foo>> from which I want to erase-remove items matching some predicate. The removed objects should have a method called which sets some status for us...
Nicolanicolai asked 1/5, 2014 at 22:5
4
Solved
It is commonly understood that a good way to fully delete desired items from a std::vector is the erase-remove idiom.
As noted in the above link (as of the date of this posting), in code the erase...
Catalinacatalo asked 4/4, 2014 at 10:24
5
Solved
I wanted to remove the elements of the vector based on the index, say all the even indexed elements.
I have read about the erase remove idiom but can't see how to apply it.
This is what I tried:
...
Tropopause asked 8/12, 2011 at 7:37
2
Solved
I've created a function to run through a vector of strings and remove any strings of length 3 or less. This is a lesson in using the STL Algorithm library.
I'm having trouble in that the functions...
Kielty asked 29/1, 2012 at 14:23
1
Solved
class A
{
bool OutofRange(string& a, string& b, string c);
void Get(vector <string>& str, string& a, string& b);
}
void A::Get(vector <string>& str, string&am...
Breed asked 11/11, 2009 at 14:52
1
© 2022 - 2024 — McMap. All rights reserved.