patterncppCritical

check if a std::vector contains a certain object?

Submitted by: @import:stackoverflow-api·Mar 10, 2026·

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objectcheckstdvectorcertaincontains

Problem

Is there something in `

 which allows  you to check if a std:: container contains something? Or, a way to make one, for example:

if(a.x == b.x && a.y == b.y)
return true;

return false;


Can this only be done with

std::map` since it uses keys?

Thanks

Solution

Checking if v contains the element x:

#include 

if(std::find(v.begin(), v.end(), x) != v.end()) {
    /* v contains x */
} else {
    /* v does not contain x */
}

Checking if v contains elements (is non-empty):

if(!v.empty()){
    /* v is non-empty */
} else {
    /* v is empty */
}

Code Snippets

#include <algorithm>

if(std::find(v.begin(), v.end(), x) != v.end()) {
    /* v contains x */
} else {
    /* v does not contain x */
}

if(!v.empty()){
    /* v is non-empty */
} else {
    /* v is empty */
}

Context

Stack Overflow Q#3450860, score: 729

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