473,587 Members | 2,267 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

vector::erase

mickey0
142 New Member
Hello
I have a vector and an index 'i';
I need something like:
Expand|Select|Wrap|Line Numbers
  1. for (int i = vec.size() - 1 ;i >= 0; i--) {
  2.     if (something(i) ) vec.removeAt(i);
  3. }
  4.  
using c++ standard library; is it possibile from an int gets the iterator?

Thanks,
Aug 10 '08 #1
1 1819
weaknessforcats
9,208 Recognized Expert Moderator Expert
Nope.

You have to define a random access interator and set it.

Expand|Select|Wrap|Line Numbers
  1. vector<whatever>::iterator itr;
  2.  
  3. itr = vec.begin();
  4.  
  5. //then:
  6.  
  7. advance(itr);
  8.  
  9. //then
  10.  
  11. vec.erase(itr0;
  12.  
Aug 10 '08 #2

Sign in to post your reply or Sign up for a free account.

Similar topics

1
4087
by: kaede | last post by:
Hi all, I recently came across the following code: // some data struct Data { // ... some data }; // a list to hold the data vector<Data> dataList;
9
3368
by: BCC | last post by:
I have the following code, where good_list is a vector of CUnits: int high_cutoff = 10; vector<CUnit>::iterator it; for (it = good_list.end(); it != good_list.begin(); --it) { CUnit* ccu = it; if (ccu->GetCutoff() >= high_cutoff) { good_list.erase(it); } }
10
4562
by: Alex Vinokur | last post by:
vector<int> v; erase() requires (as input parameter) and returns vector<int>::iterator, rbegin() returns vector<int>::reverse_iterator. So, a compiler doesn't accept v.erase(v.rbegin()). Do we have to write v.erase(v.end() - 1)? Or there exists something else? -- Alex Vinokur
9
5189
by: Amadeus W. M. | last post by:
I have a vector from which I want to erase elements between iterators i,j. If i<j, everything works as expected, but if j>i, an insertion is actually performed. Example: vector<double> x(10); vector<double>::iterator i=x.begin()+2, j=x.begin()+6; x.erase(i,j); // i<j, ok, erases 4 elements. x.erase(j,i); // j>i, no error, just...
3
2352
by: ma740988 | last post by:
For discussion purposes, assume the vector ivec contains 67108864 (67 million elements) elements. Lets futher assume nstart and end equal 1008000 and 11088000 respectively. The question. What's the _fastest_ way to erase element numbers less than 1008000 and element numbers greater than 11088000. Current approach. typedef std::vector...
5
2046
by: Anil | last post by:
I am facing problem while erasing an elemet from stl vector when its size is 2. It works fine when SIZE 2. Can anybody help me in this?? Following is the sample code which i tried. #include <iostream> #include <vector> using namespace std; #define SIZE 2
13
7469
by: thomas | last post by:
suppose I will delete an element pointed to by "iter". like this: vector<ints; for(vector<int>::iterator iter=s.begin(); iter!=s.end(); iter++){ if(*iter==3) s.erase(iter); //A } in line A, if element by "iter" is erased, will "iter" point to the
3
1870
by: subramanian100in | last post by:
Consider vector<stringv; If we call, v.erase(v.end()) this invokes undefined behaviour. But, if we call
0
7915
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main...
0
7843
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language...
0
8339
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that...
0
8220
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the...
0
6619
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then...
1
5712
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes...
0
3840
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in...
1
1452
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.
0
1185
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.