Is there a simple way to take a single-dimensional array and convert it to a multi-dimensional array based on the spaces, or any character(s), in the keys?
$arr['foo1'] = 'bar1';
$arr['foo2'] = 'bar2';
$arr['foo3 tier1' ] = 'bar3';
$arr['foo4 tier1' ] = 'bar4';
and turn it into
$arr['foo1'] = 'bar1';
$arr['foo2'] = 'bar2';
$arr['foo3']['tier1'] = 'bar3';
$arr['foo4']['tier1'] = 'bar4';
you can always do some sort of foreach loop
$newarr = array();
foreach ($arr as $key => $value) {
$output = explode(' ',$key,2);
if(count($output)) {
$newarr[$output[0]][$output[1]] = $value;
} else {
$newarr[$key] = $value;
}
}
That code will only work for one space but you can expand it to multiple spaces, something like
function pivot($arr,$delimeter) {
$return = array();
foreach ($arr as $key => $value) {
$output = explode($delimeter,$key,2);
if(count($output)) {
if(strpos($output[1],$delimeter) > 0) {
$return[$output[0]] = pivot(array($output[1]=>$value),$delimeter);
} else {
$return[$output[0]][$output[1]] = $value;
}
} else {
$return[$key] = $value;
}
}
return $return;
}
Related
$array = ['coke.','fanta.','chocolate.'];
foreach ($array as $key => $value) {
if (strlen($value)<6) {
$new[] = $value." ".$array[$key+1];
} else {
$new[] = $value;
}
}
This code doesn't have the desired effect, in fact it doesn't work at all. What I want to do is if an array element has string length less than 5, join it with the next element. So in this case the array should turn into this:
$array = ['coke. fanta.','chocolate.'];
$array = ['coke.','fanta.','chocolate.', 'candy'];
$new = [];
reset($array); // ensure internal pointer is at start
do{
$val = current($array); // capture current value
if(strlen($val)>=6):
$new[] = $val; // long string; add to $new
// short string. Concatenate with next value
// (note this moves array pointer forward)
else:
$nextVal = next($array) ? : '';
$new[] = trim($val . ' ' . $nextVal);
endif;
}while(next($array));
print_r($new); // what you want
Live demo
With array_reduce:
$array = ['coke.', 'fanta.', 'chocolate.', 'a.', 'b.', 'c.', 'd.'];
$result = array_reduce($array, function($c, $i) {
if ( strlen(end($c)) < 6 )
$c[key($c)] .= empty(current($c)) ? $i : " $i";
else
$c[] = $i;
return $c;
}, ['']);
print_r($result);
demo
<pre>
$array = ['coke.','fanta.','chocolate.'];
print_r($array);
echo "<pre>";
$next_merge = "";
foreach ($array as $key => $value) {
if($next_merge == $value){
continue;
}
if (strlen($value)<6) {
$new[] = $value." ".$array[$key+1];
$next_merge = $array[$key+1];
} else {
$new[] = $value;
}
}
print_r($new);
</pre>
Updated Code after adding pop after chocolate.
<pre>
$array = ['coke.','fanta.','chocolate.','pop'];
print_r($array);
echo "<br>";
$next_merge = "";
foreach ($array as $key => $value) {
if($next_merge == $value){
continue;
}
if (strlen($value)<6 && !empty($array[$key+1])) {
$new[] = $value." ".$array[$key+1];
$next_merge = $array[$key+1];
} else {
$new[] = $value;
}
}
print_r($new);
<pre>
You need to skip the iteration for the values that you have already added.
$array = ['coke.', 'fanta.', 'chocolate.'];
$cont = false;
foreach ($array as $key => $value) {
if ($cont) {
$cont = false;
continue;
}
if (strlen($value) < 6 && isset($array[$key+1])) {
$new[] = $value.' '.$array[$key+1];
$cont = true;
}
else {
$new[] = $value;
}
}
print_r($new);
I wasn't so clear in my first question, so i deleted it and here is a reformulation;
I have those arrays:
$open = array(array("FAI1","34"),array("FAI2","34"),array("FAI3","34"));
$click = array(array("FAI2","52"),array("FAI1","68"),array("FAI3","99"));
$unsubscribe = array(array("FAI2","103"),array("FAI3","67"),array("FAI1","102"));
$def_sent = array(array("FAI1","34",24),array("FAI2","34",23),array("FAI3","34",27));
$SB = array(array("FAI2","103"),array("FAI3","67"),array("FAI1","102"));
$HB = array(array("FAI2","103"),array("FAI3","67"),array("FAI1","102"));
I searched for a function to merge them and get a result like this:
$result = array(array("FAI1",34,68,102,34,24,102,102)
,array("FAI2","34",23.....),
array("FAI3","34",27....));
and to do this, i used the function, in the php online documentation, and this is the function
function array_merge_recursive() {
$arrays = func_get_args();
$base = array_shift($arrays);
foreach ($arrays as $array) {
reset($base);
while (list($key, $value) = #each($array)) {
if (is_array($value) && #is_array($base[$key])) {
$base[$key] = array_merge_recursive($base[$key], $value);
} else {
$base[$key] = $value;
}
}
}
return $base;
}
But instead of getting the result above i got this:
FAI1|34
FAI2|34
FAI3|34
FAI2|52
FAI1|68
FAI3|99
...
So i need some help to reformulate this function to get the expected result.
Try this function:
function array_merge_rec() {
$arrays = func_get_args();
$result = array();
foreach ($arrays as $arg) {
if (is_array($arg)) {
foreach ($arg as $item) {
if (!isset($result[$item[0]])) {
$result[$item[0]] = $item;
} else {
$result[$item[0]][] = $item[1];
}
}
} else {
echo "$arg skippend because it isn't array\n";
}
}
return array_values($result);
}
Does it help?
What is the best way to flatten an array with multiple leaf nodes so that each full path to leaf is a distinct return?
array("Object"=>array("Properties"=>array(1, 2)));
to yield
Object.Properties.1
Object.Properties.2
I'm able to flatten to Object.Properties.1 but 2 does not get processed with recursive function:
function flattenArray($prefix, $array)
{
$result = array();
foreach ($array as $key => $value)
{
if (is_array($value))
$result = array_merge($result, flattenArray($prefix . $key . '.', $value));
else
$result[$prefix . $key] = $value;
}
return $result;
}
I presume top down will not work when anticipating multiple leaf nodes, so either need some type of bottom up processing or a way to copy array for each leaf and process (althought that seems completely inefficient)
function flatten(array $data, $separator = '.') {
$result = array();
$stack = array();
$path = null;
reset($data);
while (!empty($data)) {
$key = key($data);
$element = $data[$key];
unset($data[$key]);
if (is_array($element)) {
if (!empty($data)) {
$stack[] = array($data, $path);
}
$data = $element;
$path .= $key . $separator;
} else {
$result[$path . $key] = $element;
}
if (empty($data) && !empty($stack)) {
list($data, $path) = array_pop($stack);
}
}
return $result;
}
var_dump(flatten(array("Object"=>array("Properties"=>array(1, 2)))));
Output:
array(2) {
["Object.Properties.0"]=>
int(1)
["Object.Properties.1"]=>
int(2)
}
Use function flatMapAssoc() from Kdyby Framework:
$flattened= array();
flatMapAssoc($array, function ($value, $keys) use (&$flattened) {
$flattened[implode('.', $keys)] = $value;
});
/**
* #param array|\Traversable $array
* #param callable $callback
* #return array
*/
function flatMapAssoc($array, $callback)
{
$callback = callback($callback);
$result = array();
$walker = function ($array, $keys = array()) use (&$walker, &$result, $callback) {
foreach ($array as $key => $value) {
$currentKeys = $keys + array(count($keys) => $key);
if (is_array($value)) {
$walker($value, $currentKeys);
continue;
}
$result[] = $callback($value, $currentKeys);
}
return $result;
};
return $walker($array);
}
I would use a wrapper function to hide implementation details (the prefix parameter)
and added an if branch to test for empty arrays. At last, in case of simple leaf you should use the $value variable and not the $key one.
$x = array("Object"=>array("Properties"=>array(1, 2), "test"=>array(), "post"));
function flatten ($array) {
return flattenArray('',$array);
}
function flattenArray($prefix, $array) {
$result = array();
foreach ($array as $key => $value) {
if (is_array($value)) {
if(count($value)) {
$result = array_merge($result, flattenArray($prefix."$key.", $value));
} else {
$result[] = "$prefix$key";
}
} else {
$result[] = "$prefix$value";
}
}
return $result;
}
echo join("\n", flatten($x));
If you want to mimic a tree structure, maybe you can use a different array structure. Something like this:
$y = array ("Object",
array("Properties", 1, 2),
"test",
"post"
);
and flattenArray becomes:
function flattenArray($prefix, $array) {
$result = array();
$prefix .=array_shift($array).'.';
foreach ($array as $value) {
if (is_array($value)) {
$result = array_merge($result, flattenArray($prefix, $value));
} else {
$result[] = "$prefix$value";
}
}
return $result;
}
Given an array, I would like a flattened version of the array keys. Each array key would need the 'path' of the array, to that point, appended with an underscore.
An example explains this best.
$arr = array("location"=>0,"details"=>array("width"=>0,"height"=>0,"level"=>array("three"=>0)));
function answer($arr) {....}
the answer function would return this:
array("location","details_width","details_height","details_level_three");
UPDATE:
Here is the work in progress. It will accept an array and return the array keys, but with no depth:
function recursive_keys($input)
{
$output = array_keys($input);
foreach($input as $sub){
if(is_array($sub)){
$output = array_merge($output, recursive_keys($sub));
}
}
return $output;
}
$ritit = new RecursiveIteratorIterator(new RecursiveArrayIterator($arr));
$results = array();
foreach ($ritit as $leafValue) {
$path = array();
foreach (range(0, $ritit->getDepth()) as $depth) {
$path[] = $ritit->getSubIterator($depth)->key();
}
$results[] = join('_', $path);
}
function recursive_keys(array $array, array $path = array()) {
$result = array();
foreach ($array as $key => $val) {
$currentPath = array_merge($path, array($key));
if (is_array($val)) {
$result = array_merge($result, recursive_keys($val, $currentPath));
} else {
$result[] = join('_', $currentPath);
}
}
return $result;
}
Demo here: http://codepad.viper-7.com/WQ3UYI
From:
$arr = array(array('key1'=>'A',...),array('key1'=>'B',...));
to:
array('A','B',..);
$output = array();
foreach ($arr as $array_piece) {
$output = array_merge($output, $array_piece);
}
return array_values($output);
On the other hand, if you want the first value from each array, what you want is...
$output = array();
foreach ($arr as $array_piece) {
$output[] = array_unshift($array_piece);
}
But I'm thinking you want the first one.
Relatively simple conversion by looping:
$newArray = array()
foreach ($arr as $a) {
foreach ($a as $key => $value) {
$newArray[] = $value;
}
}
Or, perhaps more elegantly:
function flatten($concatenation, $subArray) {
return array_merge($concatenation, array_values($subArray));
}
$newArray = array_reduce($arr, "flatten", array());
John's solution is also nice.
Something like this should work
<?
$arr = array(array('key1'=>'A','key2'=>'B'),array('key1'=>'C','key2'=>'D'));
$new_array = array();
foreach ($arr as $key => $value) {
$new_array = array_merge($new_array, array_values($value));
}
var_export($new_array);
?>
If you want all the values in each array inside your main array.
function collapse($input) {
$buf = array();
if(is_array($input)) {
foreach($input as $i) $buf = array_merge($buf, collapse($i));
}
else $buf[] = $input;
return $buf;
}
Above is a modified unsplat function, which could also be used:
function unsplat($input, $delim="\t") {
$buf = array();
if(is_array($input)) {
foreach($input as $i) $buf[] = unsplat($i, $delim);
}
else $buf[] = $input;
return implode($delim, $buf);
}
$newarray = explode("\0", unsplat($oldarray, "\0"));