Databases
StackOverflow2013
Postsdbo
POAdding vectors within typedef map<set,vectors>
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POAdding vectors within typedef map<set,vectors>
    primarykey
    data
    text
    <p>I've a data structure as follows</p> <pre><code>typedef vector&lt;double&gt; v_t; typedef set&lt;int&gt; s_t; typedef map&lt;s_t, v_t&gt; m_t; </code></pre> <p>Lets say the map <code>m1</code> that has following values :</p> <pre><code>&lt; &lt;1&gt;,&lt;1,1,1,1&gt; &gt; &lt; &lt;2&gt;,&lt;2,2,2,2&gt; &gt; &lt; &lt;3&gt;,&lt;3,3,3,3&gt; &gt; &lt; &lt;4&gt;,&lt;4,4,4,4&gt; &gt; </code></pre> <p>and I've a separate vector <code>v1</code> that has values like </p> <pre><code>&lt;1,3,4&gt; </code></pre> <p>Now what I want to do is to add the vectors the first, third and fourth vectors in the map and the result should be stored in a new map say <code>mtot</code> as</p> <pre><code>&lt; &lt;1,3,4&gt;,&lt;8,8,8,8&gt; &gt; </code></pre> <p>Here is my following try that results in a segmentation fault: Any help, improvement or even your idea of implementation is greatly appreciated.</p> <pre><code> s_t stemp,stemp1; v_t vtot(4); //I know the size typedef v_t::iterator v_it; typedef m_t::iterator m_it; // Assume I've v1 and m1 in hand for(v_it it(v1.begin());it != v1.end();++it) { stemp1.insert(stemp1.end(),*it); m_it mit = m1.find(stemp1); copy(mit-&gt;second.begin(),mit-&gt;second.end(),ostream_iterator&lt;int&gt;(cout," ")); cout &lt;&lt; endl; // Debug not working. There is some problem with the iterator I guess transform(mit-&gt;second.begin(),mit-&gt;second.end(),vtot.begin(),vtot.begin(),plus&lt;double&gt;()); stemp1.clear(); } stemp.insert(v1.begin(),v1.end()); mtot.insert(mtot.end(),make_pair(stemp,vtot)); } </code></pre> <p>Thanks.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USSunny Raj
    1. USSunny Raj
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload