This tag refers to the process of removing or deleting data, text, files, or memory.
Questions tagged [erase]
739 questions
3
votes
3 answers
Erase in a loop with a condition in C++
Is there a better way to write:
for (auto i = container.begin(); i != container.end();)
{
if (condition(i))
{
i = container.erase(i);
continue;
}
++i;
}
This code does what I want, but it feels like bad style.
How can…
Fractale
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3
votes
3 answers
C++ map::erase() does not erase data
I'm trying to test C++ map::erase() with the following code:
//file user.h
#include
#include
#include
using namespace std;
class User {
string name;
int id;
public:
User(const string& name, int id) :…
Marco
- 391
- 4
- 18
3
votes
1 answer
Erase Part of Bitmap with another Bitmap
Let me preface this with a real life product; You may remember in Elementary school, they had scratch paper which basically consisted of a rainbow-colored sheet of paper with a black film on top. You would take a sharp object and peel away the black…
DJ Schrecker
- 33
- 3
3
votes
1 answer
Generic erase function
I need to erase elements of different stl and boost containers by an iterator. Sometimes I also need to do that with a reverse_iterator so I wanted to wrap that into a generic function (set).
According to this:
Iterator invalidation rules it should…
Flamefire
- 5,313
- 3
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- 70
3
votes
1 answer
std::vector::erase deleting last element instead of first
I am fairly new to c++, but had a question about vectors. My goal is to remove an element from the vector using erase once I hit my out of bounds condition. This all seems to work fine, except that when I call erase, it will be pointing to the…
ColdFire
- 31
- 2
3
votes
3 answers
vector::erase does not erase the desired element, but instead erases the last element from the vector
I've been working on learning c++, but now I'm stuck with a problem that really confuses me. The problem is that when i try to erase an element from a vector, the erase function does not erase the element that i wanted to be erased, but instead…
Tuotau
- 41
- 3
3
votes
0 answers
c++ map erase SIGSEGV segmentation fault
I'm debugging my program now and I get segmentation fault when erasing an element from a map.
I added malloc hook to my programs which looks as follow: (UPDATED)
#pragma once
#include
#include
#include
MoonBun
- 4,322
- 3
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- 69
3
votes
2 answers
How do I remove everything in a string prior to a specific word in C++?
SEE FINAL UPDATE FOR SOLUTION
This is for school, so I request hints, not blatant answers if possible.
I need to take the phrase "My Name current community college" and output "Current Community College"
I already have a loop to capitalize current…
cma0014
- 1,517
- 3
- 11
- 9
3
votes
2 answers
Erase or delete a line drawn on a TImage Canvas
this is my first question in stackoverflow , i've searched everywhere a cross the web before posting here,so you guys are my last chance
i'm making a little program in Delphi xe5 which consist in drawing lines on a football pitch(TImage) using…
MKaiser
- 45
- 1
- 6
3
votes
1 answer
How to erase a multidimensional variant array holding objects and numbers
I have the following array which I want to erase, or at least clear:
Dim arrFiles() As Variant
The array has two columns, lngIndex and objFile.
I remember reading somewhere that erase only works in certain conditions. Will erase work on this type?…
user3645396
- 31
- 2
3
votes
5 answers
C++ Clearing vector of pointers to dynamically-allocated object causes exception?
I have a class called ClassA. This ClassA holds a vector of pointers to dynamically allocated objects of class ClassB. The destructor for ClassA looks like this:
ClassA::~ClassA() {
for (vector::iterator i = m_vActiveB.begin(), e =…
Raiden616
- 1,545
- 3
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- 42
3
votes
1 answer
how to erase smoothly in android?
i want the eraser to erase smoothly but in my activity by default it erase the lines on touch draw and erase the lines on touch is not proper.my code what i had worked on.
public void Draw(){
count=1;
bmp =…
GOPATHI
- 91
- 1
- 6
3
votes
2 answers
C++ : deleting multiple elements of a list while iterating the list
I know how do erase elements of a list, and that erase return a valid iterater. My problem is, that I want to remove not just one element but multiple.
Actuall my code is like
for(list::iterator it=currentLevel->begin();…
Name
- 33
- 1
- 3
3
votes
3 answers
Destruction of an object when erasing it from std::map
I was curios if default destructor is called, when I'm removing an element from an std::map. Here is an example which I have made:
class CTestMap{
public:
CTestMap() {
std::cout << "default constructor called" << std::endl;
}
…
JosiP
- 2,619
- 5
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- 33
3
votes
2 answers
Replacing items in a list using a C++ std::list iterator
The basic structure of my code is:
using namespace std;
void recursiveFunction(list &jobs,...){
list::iterator i;
int ii;
//code missing
for(i=jobs.begin(); i != jobs.end(); ++i){
//more code missing
…
DylanTheWebb
- 33
- 1
- 1
- 3