array-merge
Deep merge dictionaries of dictionaries in Python
This is actually quite tricky – particularly if you want a useful error message when things are inconsistent, while correctly accepting duplicate but consistent entries (something no other answer here does..) Assuming you don’t have huge numbers of entries, a recursive function is easiest: def merge(a: dict, b: dict, path=[]): for key in b: if … Read more
PHP array_merge with numerical keys
Use the + operator. Compare array_merge to + operator: <?php $a1 = array(0=>”whatever”,); $a2 = array(0=>”whatever”,1=>”a”,2=>”b”); print_r(array_merge($a1,$a2)); print_r($a1+$a2); ?> Output: Array ( [0] => whatever [1] => whatever [2] => a [3] => b ) Array ( [0] => whatever [1] => a [2] => b ) The + operator still works if your associative … Read more
Merging arrays with the same keys
You need to use array_merge_recursive instead of array_merge. Of course there can only be one key equal to ‘c’ in the array, but the associated value will be an array containing both 3 and 4.
PHP – How to merge arrays inside array [closed]
array_merge can take variable number of arguments, so with a little call_user_func_array trickery you can pass your $result array to it: $merged = call_user_func_array(‘array_merge’, $result); This basically run like if you would have typed: $merged = array_merge($result[0], $result[1], …. $result[n]); Update: Now with 5.6, we have the … operator to unpack arrays to arguments, so … Read more
Prepend associative array elements to an associative array
Can’t you just do: $resulting_array = $array2 + $array1; ?
Array_merge versus + [duplicate]
Because both arrays are numerically-indexed, only the values in the first array will be used. The + operator returns the right-hand array appended to the left-hand array; for keys that exist in both arrays, the elements from the left-hand array will be used, and the matching elements from the right-hand array will be ignored. http://php.net/manual/en/language.operators.array.php … Read more
How to merge dictionaries of dictionaries?
This is actually quite tricky – particularly if you want a useful error message when things are inconsistent, while correctly accepting duplicate but consistent entries (something no other answer here does..) Assuming you don’t have huge numbers of entries, a recursive function is easiest: def merge(a, b, path=None): “merges b into a” if path is … Read more
PHP: merge two arrays while keeping keys instead of reindexing?
You can simply ‘add’ the arrays: >> $a = array(1, 2, 3); array ( 0 => 1, 1 => 2, 2 => 3, ) >> $b = array(“a” => 1, “b” => 2, “c” => 3) array ( ‘a’ => 1, ‘b’ => 2, ‘c’ => 3, ) >> $a + $b array ( 0 … Read more