What is better to use: in_array or array_unique?
array-unique, arrays, php
Solution
I think the second approach would be more efficient. In fact, array_unique sorts the array then scans it.
Sorting is done in N log N steps, then scanning takes N steps.
The first approach takes N^2 steps (foreach element scans all N previous elements). On big arrays, there is a very big difference.
Problem
I am in doubt what to use: ``` foreach(){ // ..... if(!in_array($view, $this->_views[$condition])) array_push($this->_views[$condition], $view); // .... } ``` OR ``` foreach(){ // ..... array_push($this->_views[$condition], $view); // .... } $this->_views[$condition] = array_unique($this->_views[$condition]); ``` UPDATE The goal is to get array of unique values. This can be done by checking every time if value already exists with `in_array` or add all values each time and in the end use `array_unique`. So is there any major difference between this two ways?