数组中元素的梯度分布

Question

this may be a dumb question,so sorry in advance.

I need to distribute 2 kinds of elements in an array, like in a gradient (is the image that comes to mind).

I'll try to explain (sorry again, I don't know some terms).

I have an array of X,Y objects, I'd like to arrange them like this (array.length will be fixed)

[X,X,X,Y,X,Y,X,Y,Y,Y] - in the middle, when X is disappearing , y start to show, and I'm always sure that array[0] is always X , and array[array.lenght-1] is always Y.

How to do this ?

Sorry again if the question isn't so clear.

Answer 1

This isn't perfect (not even slightly), but it might meed your needs, at the very least it might give you some inspiration:

<?php
$Class1 = 'a';
$Class2 = 'b';

print_r(gradient($Class1, $Class2, 10));

function gradient($class1, $class2, $size){
    $result = array();

    for($i=0; $i<$size; $i++){
        $result[$i] = rand(0, 99) >= $i/$size*100 ? $class1 : $class2;
    }

    return $result;
}
?>

Sample output (higher sizes will make it closer to your example):

Array ( [0] => a [1] => a [2] => a [3] => a [4] => b [5] => b [6] => a [7] => b [8] => b [9] => a )