Getting nids using entityfieldquery - drupal-7

Question

I want to get all the nids but I am unable to get them. Below is my snippet.
$query = new EntityFieldQuery();
$query->entityCondition('entity_type', 'node');
$query->entityCondition('bundle', 'product');
$query->propertyCondition('status', 1);
$query->fieldCondition('field_product_sub_cat', 'tid',array($leaf_nodes));
$query->range(0, 10);
$result = $query->execute();
if (isset($result['node']))
{
$product_childnid = array_keys($result['node']);
}
Below is my result:UPDATED
Array
(
[node] => Array
(
[78] => stdClass Object
(
[nid] => 78
[vid] => 78
[type] => product
)
[80] => stdClass Object
(
[nid] => 80
[vid] => 80
[type] => product
)
[82] => stdClass Object
(
[nid] => 82
[vid] => 82
[type] => product
)
[84] => stdClass Object
(
[nid] => 84
[vid] => 84
[type] => product
)
[86] => stdClass Object
(
[nid] => 86
[vid] => 86
[type] => product
)
[88] => stdClass Object
(
[nid] => 88
[vid] => 88
[type] => product
)
[90] => stdClass Object
(
[nid] => 90
[vid] => 90
[type] => product
)
[92] => stdClass Object
(
[nid] => 92
[vid] => 92
[type] => product
)
[94] => stdClass Object
(
[nid] => 94
[vid] => 94
[type] => product
)
[100] => stdClass Object
(
[nid] => 100
[vid] => 100
[type] => product
)
)
)
then below code is providing me all the paths too,
$paths = array();
if (isset($result['node']))
{
foreach($result['node'] as $key => $node)
{
$paths[$node->nid] = drupal_get_path_alias("node/$node->nid");
}
}
now the next problem is how can I represent these paths in my anchor tag?Because they all are in an array.Below is my array structure of paths aliases:
Array
(
[78] => equivalent-fireman-glove-details
[80] => toughguard®-2
[82] => toughguard®-3
[84] => toughguard-®sizzler®
[86] => tough-guard-®
[88] => kevlar®-double-glove
[90] => nomex®-industrial-coverall
[92] => tough-guard®-clinker®-0
[94] => lab-coats-sa-nlc
)
and below is an array structure data to link with above paths:
Array
(
[0] => 71
[1] => 73
[2] => 81
[3] => 83
[4] => 85
[5] => 87
[6] => 89
[7] => 91
[8] => 93
)

Answer 1

Try this:
$query->fieldCondition('field_product_sub_cat', 'tid',array($leaf_nodes),'IN');
So that the query in compare value with array.