test.txt

What is the language used?

<div class="page-head">
    <h2 class="">@if(isset($item->title)){{$item->title}}@endif</h2>
</div>

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What is the language used?
What is "isotope()"?
Is there any issue in the code or potential problem?


    $('.row_event').isotope({
        layoutMode: 'packery',
        packery: {
            columnWidth: '.isotope',
        },            
        percentPosition: true
        
    });

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What is the language used?
Where is it used?
What "void" means?

    /**
     * This method displays the given quantity value on the screen.
     */
    private void display(int number) {
        TextView quantityTextView = (TextView) findViewById(
                R.id.quantity_text_view);
        quantityTextView.setText("" + number);
    } 


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What is the language used?
What is it?
What means $end = null ?
What means !== ?

	public function ersDate($start, $end = null)
    {
        $startDate = new \DateTime($start);
        $start = Carbon::instance($startDate);

        if($end !== null){
        	$endDate = new \DateTime($end);   
        	$end = Carbon::instance($endDate);
        	return $start->day.'-'.$end->day.' '.$end->format('F').', '.$end->year; 
        }

        return $start->day.' '.$start->format('F').', '.$start->year;     
    }  



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What is the language used?
What is it?
    
interface TokenStorageInterface
{
    /**
     * @return mixed
     */
    public function read();

    /**
     * @param  array $content
     * @return mixed
     */
    public function write(array $content);