alexeyshockov / colada Goto Github PK

Removals for immutable collections, like Scala: http://www.scala-lang.org/docu/files/collections-api/collections_7.html.

• call_user_func() instead of callable.
• array() insted of short syntax.
• object and array dereferencing...

Something like getOrElse from http://www.scala-lang.org/docu/files/collections-api/collections_10.html.

Like Google Guava (http://code.google.com/p/guava-libraries/wiki/StringsExplained).

Mark stable classes/methods/functions with @api.

If isEqualTo() defined in inherited class, it will not work in comparison.

For sort collection elements with build-in comparator (and with compareTo() support for objects).

Additions for immutable collections, like Scala: http://www.scala-lang.org/docu/files/collections-api/collections_7.html.

And move this methods to functions in Colada namespace.

For maps, that contains only scalar keys, native array backend will be really better (by comparing to SplObjectStorage).

Like array_chunk().

In use case, where keys are unique, we not need multi map, but simple map.

I think, this may be achieved with something like: Collection::groupBy($keyFinder, $uniqueKeys = false).

Optimizations and interface for sorted collections.

Interface:

• sorted set builder,
• sorted collection builder,
• sorted map builder.

Thoughts on implementation: collect (as is), sort in build().

Optimizations:

• binary search (Collection::contains(), Map::containsKey()).

For collections with elements of same type some operations can be optimized (where comparison is used).

isAnyMatchBy(), isAllMatchBy(), isNoneMatchBy().

Will be useful with zip(), like this:

$keys; // Collection.
$elements; // Collection.

$map = $keys->zip($elements)->toMap();

Create builder in one place, like in IteratorCollection.

May be useful with get_class() to produce map with current type.

To exapmle, the following code:

var_dump('GO');
$a = [1,2];
$b = to_collection($a)->mapBy(function($v) {
    var_dump('Map by');

    return $v+1;
});

var_dump($b->count());

... produces the following output:

string(2) "GO"
string(6) "Map by"
string(6) "Map by"
string(6) "Map by"
int(2)