I have an array that I would like to sort, that should be easy, except that I build my array in a strange manners (for different reasons) that make it hard to sort. Here is my array :
$arrayCEO =array(
'companyName' => array(0=>'name1', 1=>'name2'),
'link' => array (0=>'link1', 1=>'link2'),
'isin' => array (0=>'isin1', 1=>'isin2'),
'mktCap' => array (0=>'mktCap1', 1=>'mktCap2'),
'nbShares' => array (0=>'nbShares1', 1=>'nbShares2'),
'amount' => array (0=>'10', 1=>'20'));
Is that possible to sort by "amount" without breaking the order in the others arrays?
Do you recommend me to rewrite my code to build an array like this one :
$arrayCEO =array(
0 => array ('name' => 'name1', 'link' => 'link1', 'isin' => 'isin1', …),
1 => array ('name' => 'name2', 'link' => 'link2', 'isin' => 'isin2', …));
2 => ...
I know this one would be simple to sort but it's a lot of work to rewrite my piece of code.
Thanks,
Dorian
It makes a lot more sense to rewrite your arrays to store in the more conventional format you described - (It's always better to organise things in decreasing magnitude 'Root > rows > fields' instead of 'Root > fields > rows')
If you didn't want to change you could probably use the usort function and roll your own sorting method, but it might be a bit of work to make it play nicely.
Related
For a client, I'm building a link between the client's application and a third party's application. The third party's application expects fields like below:
<General>
<Signing>
<Signing>
<FieldA></FieldA>
<FieldB></FieldB>
<FieldC></FieldC>
</Signing>
<Signing>
<FieldA></FieldA>
<FieldB></FieldB>
<FieldC></FieldC>
</Signing>
</Signing>
</General>
We're building the input for the link in PHP, by means of a multi-dimensional associative array. So the above XML would compute to the following PHP:
'General' => array(
'Signing' => array(
'Signing' => array(
'FieldA' => '',
'FieldB' => '',
'FieldC' => ''
),
'Signing' => array(
'FieldA' => '',
'FieldB' => '',
'FieldC' => ''
)
)
)
There's a few problems.
There's no such thing as duplicate keys in an associative array. The output would be messed up.
The third party NEEDS it like this, this is just how they set up their application.
Even if there was such a thing as duplicate kets in an associative array, there is no way that would outputto what the third party expects. The Signing would just be overwritten with the last Signing item.
My question is, how do I make a dynamic associative array (so the number of Signings can vary) with duplicate Signing keys that still outputs every instance of Signing, instead of just one Signingfield with just the last instance.
I hope this makes sense. I'm foreign and my brain is chaos so I'm terrible at explaining things.
Thanks in advance!
You cannot express the same data structure literally in PHP, period. You'll have to express it differently and your XML-serialiser will have to translate appropriately between the PHP array structure and the expected XML representation. A sensible PHP array structure would be this:
'General' => array(
'Signing' => array(
array('FieldA' => '', 'FieldB' => '', 'FieldC' => ''),
array('FieldA' => '', 'FieldB' => '', 'FieldC' => ''),
)
)
The XML serialiser would do something akin to:
foreach ($array['General']['Signing'] as $signing) {
$xml->General->Signing->appendChild('Signing')
..
}
How exactly to do this depends on your XML serialisation process. Suffice it to say that the data structure doesn't need to be/can't be literally identical and will require a translation layer.
Let's say I have an array
$array = array(
'username' => "username",
'location' => "location",
'other' => "other");
This array can hold data for many users, so there could be different values for each 'username', 'location', and 'other' fields. How can I use in_array() or another function to determine if a specific username exists in the array already? Because what if a user has a username like "nyc" and a location of "nyc" and I do
in_array("nyc", $array);
How exactly should something like this be approached?
Thank you.
To achieve something that I think is what you want, you can make an array of associative arrays that have the same keys.
<?php
// This syntax will work only on PHP 5.4
$a=[["name"=>"john","age"=>25],["name"=>"philip","age"=>110]];
print_r(array_filter($a, function($item) {return $item["name"] === "john"; }));
?>
Outputs:
Array
(
[0] => Array
(
[name] => john
[age] => 25
)
)
If you just wanted to know if a person named John was in the list, you can just use sizeof/count on the returned array.
This will allow you to have any number of duplicates, and you don't need to specify any keys. Check out the functions: array_filter, array_reduce, array_map. With all of these, you can process your list using closures like in my example above.
Instead of using associative arrays in your array, you could have objects too. Objects are more heavyweight, and need initialization and stuff, so it is grotesque for using them for tiny static (hardcoded) lists. But they may come handy when your data structures grow and you want to make sure every list item has a certain property (the constructor of the class could ensure that everything is initialized). But the good thing is that filter, reduce and map would still work. The "$item" would then be your object.
$users = array( 'user_id' => array('username' => "username",
'location' => "location",
'other' => "other");
user_id is their NUMBER user_id
So you then call $users['####']['username'];
IE:
$users = array( '1' => array('username' => 'Jim',
'location' => 'Florida',
'other' => "other"),
'2' => array('username' => 'Jane',
'location' => 'Maryland',
'other' => "Grapes"));
Then use array_keys() to search for their user_id
I have a multidimensional array or arrays which I also use in my configuration file. The file is also manually edited so I want some of the keys to have fixed position. The code reads configuration file with this array, modifies, insert keys etc and then saves it back. On save I sort the keys but now I found that it is not good enough.
Is there any way to have
the key 'full_name' always as the first key
the key 'version' as second one
and the rest of the keys to be sorted alphabetically?
Sample of the array....
array (
'skroob' =>
array (
'ssh' => 'skroob',
'codebase_path' => '/srv/www/htdocs/imacs/radek/4.0.1',
'ssh_status' => 'ok',
'version' => '4.0.1',
'ssh_last_access' => '2012-Feb-17 10:07:26',
'edu_url' => 'https://testing/imacs/radek/4.0.1',
'full_name' => 'skroob 4.0.1',
),
'testing' =>
array (
'full_name' => 'My beautiful testing server (trunk)',
'version' => 'trunk',
'ssh' => 'testing',
'codebase_path' => '/srv/www/htdocs/imacs/radek/trunk',
'ssh_last_access' => '2012-Feb-17 10:07:26',
'ssh_status' => 'ok',
),
)
Here's one way. It sorts the array alphabetically, by key. Then it reverses the array and unsets the full_name and version keys. Then it adds those keys again, so they get placed at the end of the array. Lastly, it reverses the array again. Kinda hacky but I'm not sure there's a much better way to do what you're asking.
ksort($arr['skroob']);
$arr['skroob'] = array_reverse($arr['skroob']);
$version = $arr['skroob']['version'];
$full_name = $arr['skroob']['full_name'];
unset($arr['skroob']['full_name'], $arr['skroob']['version']);
$arr['skroob']['version'] = $version;
$arr['skroob']['full_name'] = $full_name;
$arr['skroob'] = array_reverse($arr['skroob']);
Another solution is to use uksort and write a small callback function. That would probably look a bit more professional.
I've been playing around with Mongo for about a week now and I still can't work out how to modify nested arrays in Mongo with php.
So here is a sample document...
array (
'_id' => new MongoId("4cb30f560107ae9813000000"),
'email' => 'mo#maurice-campobasso.com',
'firstname' => 'Maurice',
'lastname' => 'Campobasso',
'password' => 'GOD',
'productions' =>
array (
0 =>
array (
'title' => 'a',
'date' => '1286811330.899',
),
1 =>
array (
'title' => 'b',
'date' => '1286811341.183',
),
2 =>
array (
'title' => 'c',
'date' => '1286811350.267',
),
3 =>
array (
'title' => 'd',
'date' => '1286811356.05',
),
),
)
What I wan't to do is delete an array inside the productions array, but I can't work out how. I've been playing with 'update('$pull' => ...etc)' but I haven't been able to make it work.
OK, there are a few ways to do this. In your case, I would do something like
mymongoobject.update( $unset : { "productions.2" : 1 } }
That's basically saying to unset the ".2" element of productions. Some docs here.
Now $pull should also work, but it's a little tougher because "productions" is actually an array of arrays (or objects with sub-objects). So you'd have to match arrays exactly:
mymongoobject.update( $pull : { "productions" : {'title':'d', 'date':'1286811356.05'} }
In the case above, the unset is probably the easiest option (though it will leave a "hole" in the array)
That is actually very easy, unlike traditional sql stuff you just modify the whole data and pass it back.
$cursor = $mongo->yourDB->yourCollection->findOne("_id",4cb30f560107ae9813000000);
//let's remove last item on productions
array_splice($cursor["productions"],2);
//and update the mongo document
echo $mongo->yourDB->yourCollection->update($cursor);
//it echoes 1 if successful
hope it helps.
I'm probably missing something simple here but I can't seem to find a way to build a query that will allow me to update a match in a group of nested values.
I have a document like this for a blog app I've been working on (currently uses MySQL):
array (
'_id' => new MongoId("4bc8dcee8ba936a8101a0000"),
'created' => '20100418-201312 +0000',
'post-title' => 'Some Post Title',
'post-body' => 'Blah Blah Blah Blah.',
'post-blog-name' => 'default',
'post-comments' =>
array (
0 =>
array (
'comment-title' => 'Test1',
'comment-body' => 'asdf1',
'created' => '20100418-214512 +0000',
'owner' => 'User1',
),
1 =>
array (
'comment-title' => 'Test2',
'comment-body' => 'asdf2',
'created' => '20100418-214512 +0000',
'owner' => 'User2',
),
),
'owner' => 'zach',
'updated' => '20100418-201312 +0000',
)
I'd like to be able to build a query that can search 'comment-title' for a match and then allow me to update/change/delete data as needed.
Obviously I can perform an update using a query which includes the key value. Something like this works:
$collection->update(
array("post-comments.0.comment-title" => $_POST['comment-title']),
array('$set' => array('entries.0' => array('comment-title' => $_POST['comment-title'], 'comment-body' => $_POST['comment-body'], 'owner' => $_SESSION['username'], 'updated' => gmdate('Ymd\-His O')))));
But I expect I'm missing something that would allow me to leave out the key and still be able to match one of the nested arrays based on a value (in this example the 'comment-title').
Anyway, sorry, this probably isn't the best example and I probably will end up using the keys in comments to identify them (comment #) but since nesting and creating rather complex objects seem to be a few of Mongodbs strong points I'm just hoping someone can point out what it is I might be missing.
A query to remove or update all comments by a specific user (say a user the blog author just black-listed) might be a better example. I'm not sure how I'd do this short of pulling out the entire document and then iterating through the nested arrays using PHP.
try ... notice I removed the "key"
$collection->update(array("post-comments.comment-title" ...
Cheers!