The Max operator operates on an Observable that emits numbers (or items that can be evaluated as numbers), and emits a single item: the item with the largest number.
TBD
TBD
In RxGroovy, this operator is not in the ReactiveX core, but is part of the distinct
rxjava-math module.
RxGroovy implements a max operator. It takes an optional comparator that it
will use instead of its default to compare the value of two items. If more than one item
has the identical maximum value, max will emit the last such item
emitted by the source Observable.
The maxBy operator is similar to max, but instead of emitting the
item with the maximum value, it emits the item with the maximum key, where that
key is generated based on a function you provide to maxBy
In RxJava, this operator is not in the ReactiveX core, but is part of the distinct
rxjava-math module.
RxJava implements a max operator. It takes an optional comparator that it
will use instead of its default to compare the value of two items. If more than one item
has the identical maximum value, max will emit the last such item
emitted by the source Observable.
The maxBy operator is similar to max, but instead of emitting the
item with the maximum value, it emits the item with the maximum key, where that
key is generated based on a function you provide to maxBy
RxJS implements the max operator. It takes an optional comparer function that it
will use instead of its default to compare the value of two items.
ReactiveX
var source = Rx.Observable.fromArray([1,3,5,7,9,2,4,6,8]).max();
var subscription = source.subscribe(
function (x) { console.log('Next: ' + x); },
function (err) { console.log('Error: ' + err); },
function () { console.log('Completed'); } );Next: 9 Completed
The maxBy operator is similar to max, but instead of emitting the
item with the maximum value, it emits the item with the maximum key, where that
key is generated based on a function you provide to maxBy. maxBy
also takes an optional second parameter: a comparer function that it will use instead of its
default to compare the keys of the two items.
maxBy emits a list. If more than one item has the maximum key value, each such
item will be represented in the list.
var source = Rx.Observable.fromArray([1,3,5,7,9,2,4,6,8,9])
.maxBy( function (x) { return x; } );
var subscription = source.subscribe(
function (x) { console.log('Next: ' + x); },
function (err) { console.log('Error: ' + err); },
function () { console.log('Completed'); } );Next: 9,9 Completed
max and maxBy are found in the following distributions:
rx.all.jsrx.all.compat.jsrx.aggregates.jsThey requires one of the following:
rx.jsrx.compat.jsrx.lite.jsrx.lite.compat.jsTBD
RxPHP implements this operator as max.
Returns the maximum value in an observable sequence according to the specified comparer.
//from https://github.com/ReactiveX/RxPHP/blob/master/demo/max/max.php
/* Without comparer */
$source = \Rx\Observable::fromArray([1, 3, 5, 7, 9, 2, 4, 6, 8])
->max();
$subscription = $source->subscribe($createStdoutObserver());
Next value: 9
Complete!
//from https://github.com/ReactiveX/RxPHP/blob/master/demo/max/max-with-comparer.php
/* With a comparer */
$comparer = function ($x, $y) {
if ($x > $y) {
return 1;
} elseif ($x < $y) {
return -1;
}
return 0;
};
$source = \Rx\Observable::fromArray([1, 3, 5, 7, 9, 2, 4, 6, 8])
->max($comparer);
$subscription = $source->subscribe($createStdoutObserver());
Next value: 9
Complete!
TBD
TBD
TBD