In C check if std vector string contains a certain value

Question

Is there any built in function which tells me that my vector contains a certain element or not e g   std  vector lt string gt  v  v push back  abc    v push back  xyz     if  v contains  abc       I am looking for one such feature  is there any                           such function or i need to loop through whole vector

User · Answer

it s in  lt algorithm gt  and called std  find

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You can use std  find as follows   if  std  find v begin    v end     abc      v end           Element in vector      To be able to use std  find  include  lt algorithm gt

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In C  11  you can use std  any of instead    An example to find if there is any zero in the array   std  array lt int 3 gt  foo    0 1 -1   if   std  any of foo begin    foo end       int i  return i  0      std  cout  lt  lt   zero found

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If your container only contains unique values  consider using std  set instead  It allows querying of set membership with logarithmic complexity   std  set lt std  string gt  s   s insert  quot abc quot     s insert  quot xyz quot     if  s find  quot abc quot      s end            If your vector is kept sorted  use std  binary search  it offers logarithmic complexity as well   If all else fails  fall back to std  find  which is a simple linear search

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std  find

[c++] In C++ check if std::vector<string> contains a certain value

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