Check if array is associative in a class

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Check if array is associative in a class

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#1 by (1 votes)

3

I have a class in which I need to do certain checks on an array, such as checking whether it is associative or indexed. I know there is no native function in PHP that does this, so I could use the example below.

function isAssoc($arr)
{
    return array_keys($arr) !== range(0, count($arr) - 1);
}

Example taken from here .

But since I'm working with object-oriented and would like to do things the right way, I know that:

It's not nice to create a list of functions in a "do everything" global file.

The class where I'm running the scan should not know how to do the scan, just check, so a clousure would also not be a good idea.

As I want my class to be of simpler use I see no sense injecting a dependency into a class that treats arrays in the method signature, I just wanted to check out such an array, as a native function does.

In short, I wanted to implement something like the code below, but in the right way:

public function __construct($name, $content = null, $attributes= null)  
{
    if(is_assoc($content){
        // 
    }
    else{
       //
    }
}

php array

asked by anonymous 31.10.2015 / 22:50

1 answer

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score 1 · Answer 1

I thought of some ways to solve this problem here.

The first is to use a global function. Not everything in your application needs to be object oriented or there is only one right way to do things. For this case I see no problem of this being a global function if it really makes sense.

Another way is to create a trait and insert it into your class, something like this:

trait ArrayUtils 
{
    function isAssoc(array $arr)
    {
        return array_keys($arr) !== range(0, count($arr) - 1);
    }
}

class MyClass 
{
    use ArrayUtils;

    public function __construct($name, array $content = [], $attributes= null)  
    {
        if($this->is_assoc($content){

        } else {

        }
    }
}

If possible, I find it interesting to make sure that the submitted argument is an array using type hinting >, so you can avoid some extra checks on your methods.