Number of elements that have at least the reported value

Question

Number of elements that have at least the reported value

Navigation

#1 by (1 votes)
#2 by (0 votes)

0

I have an array that can be any size, an example below:

Array
(
  [0] => 40631
  [1] => 40626
  [2] => 40622
  [3] => 40633
  [4] => 59632
  [5] => 40630
  [6] => 40623
  [7] => 40627
  [8] => 40628
  [9] => 54828
  [10] => 40623
  [11] => 40630
  [12] => 42623
  [13] => 54318
)

When entering any value, for example the number 50000, I should return the number of values that have at least 50000.

In this example, the function should return: 3

As this array can have N sizes and can receive any value to fetch the array, what form to look for the quantity and with the best performance?

php array

asked by anonymous 13.04.2018 / 02:53

2 answers

0

As you have to go through the entire array to check its values, I think the best way is to foreach itself:

<?php
$array = array('40631','40626','40622','40633','59632','54828');

$conta = 0;

foreach($array as $item){
   if($item >= 50000) $conta++;
}

echo $conta; // retorna 2

?>

Ideone Test

13.04.2018 / 03:09

Loop loop in programming logic algorithm How to run a RestFull project on the TomCat server?

score 1 · Accepted Answer

In PHP, you'd better worry about simplicity rather than performance, since the language itself was not designed to be quick, but to simplify some tasks. In this case, just use the array_filter function:

$values = [
  40631,
  40626,
  40622,
  40633,
  59632,
  40630,
  40623,
  40627,
  40628,
  54828,
  40623,
  40630,
  42623,
  54318,
];

$filtered = array_filter($values, function ($value) {
  return $value >= 50000;
});

print_r($filtered);

See working at Repl.it

The result will be:

Array
(
    [4] => 59632
    [9] => 54828
    [13] => 54318
)

To get the quantity, just do:

$quantidade = count($filtered);  // 3