therajumandapati

$post_ids = [3011, 2883, 2930, 2912, 2904, 2801, 2640, 2515, 2480, 1505, 1118, 1011, 1098];

function convertRecipeData($post_id) {
  if($post_id === null) return;


  echo "============ START POST ID: " . $post_id . " =============\n";
  echo "Getting post...\n";
  $post = get_post($post_id);

therajumandapati

$post = get_post(2930);

$blocks = parse_blocks( $post->post_content );

foreach ( $blocks as $block ) {
  if( 'wpzoom-recipe-card/block-recipe-card' === $block['blockName']) {

    $recipe = [
      'title' => $block['attrs']['recipeTitle'],
      'summary' => array_key_exists('jsonSummary', $block['attrs']) ? $block['attrs']['jsonSummary']: null,

therajumandapati

<script async src="https://www.googletagmanager.com/gtag/js?id=UA-XXXXXXXX"></script>
<script>
    window.dataLayer = window.dataLayer || [];
    function gtag(){dataLayer.push(arguments);}
    gtag('js', new Date());

    gtag('config', 'UA-XXXXXXXX');
</script>
<script>
  function redirect(url) {

therajumandapati

+[] evaluates to the number zero, because unary-plus tries to convert any value to a number, so that leaves
 
++[[]][0]+[0]
 
[[]][0] is an expression accessing the first element in the array, which is a reference to the inner array. This is shorthand for x = [[]]; x[0];, if it helps you see it better.
 
++[[]][0] then evaluates to a pre-increment of the first element in the array, which returns the value after the element is incremented.  Because an array is not numeric, it first needs to coerce it to a number.  We saw before that an empty array coerces to 0, so incrementing 0 is 1.  If we had a reference to [[]], we’d see that it becomes [1] after the increment operation. (i.e. x = [[]]; ++x[0] // returns 1, and x is now [1])
 
So, this whole expression boils down to 1 + [0].  Since a number and an array can’t normally be added together, javascript converts both values to strings and concatenates them.