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How do I get the current index in a foreach loop?

foreach ($arr as $key => $val)
    // How do I get the index?
    // How do I get the first element in an associative array?



In your sample code, it would just be $key.

If you want to know, for example, if this is the first, second, or ith iteration of the loop, this is your only option:

$i = -1;
foreach($arr as $val) {
  //$i is now the index.  if $i == 0, then this is the first element.

Of course, this doesn't mean that $val == $arr[$i] because the array could be an associative array.

Tuesday, August 23, 2022

The reason for the "overwriting" is $tempChild = $child;.

That will not deep copy the contents of $child but make both $tempChild and $child point towards the same data structure, which obviously isn't desirable in this case.

You should use clone as in the below example.

$tempChild = clone $child;

  • PHP: Object Cloning - Manual
Saturday, November 12, 2022

Comments included.


//Require Core Component

$Threads = new StackableArray();

//A Global Storage that will be shared between threads.
$Storage = new Storage();

//Store {count} in Global Storage
$Storage['count'] = 0;

 * For Each Site, spawn a new thread, process the site and store result in Global Storage.
foreach($sites as $site)
    $Thread = new SiteProcess($Storage, $site);
    $Threads[$re] = $Thread;

//When the threads are complete, join them(destroy the threads)
foreach($Threads as $Thread)

//A thread class
class SiteProcess extends Threads
    private $Storage;
    private $site;

    public function __construct(Storage $Storage, $site)
        $this->Storage = $Storage;
        $this->site = $site;

    public function run()
        $siteObj = new $this->site;
        $this->Storage[$this->Storage['count']] = $siteObj->getsiteData($query, $cat);
        $this->Storage['count'] = $this->Storage['count'] + 1;

class StackableArray extends Stackable { public function run() { } };

class Storage extends Stackable { public function run() { } };
Wednesday, November 23, 2022

You can do something like this:

int i = 0;
foreach (var grouping in Class.Students.GroupBy(s => ++i / 20))
    Console.WriteLine("You belong to Group " + grouping.Key.ToString());
Sunday, November 27, 2022

In OS 3.x, there's a property called "zoomScale" that will give you what you want. In 2.x, I believe you can look directly at the contentView's transform to obtain this (but that is, of course, not 'official'.)

Tuesday, August 23, 2022
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