function ipull($list, $index, $key_index)

libphutil Technical Documentation (Core Utilities)

Choose an index from a list of arrays. Short for "index pull", this function works just like mpull(), except that it operates on a list of arrays and selects an index from them instead of operating on a list of objects and calling a method on them.

This function simplifies a common type of mapping operation:

$names = array();
foreach ($list as $key => $dict) {
  $names[$key] = $dict['name'];
}

With ipull():

$names = ipull($list, 'name');

See mpull() for more usage examples.