it 'computes correctly when on & off have a list at cronRange[4]', ->
#component.set('cronRanges', [Ember.Object.create({
on: "* * * 3 3,1,5"
off: "* * * 3 3,1,5"
})])
#component.set('dayOfWeek', 2)
expect(#component.get('inRange')).to.be.false
#component.set('dayOfWeek', 5)
expect(#component.get('inRange')).to.be.true
#component.set('dayOfWeek', 1)
expect(#component.get('inRange')).to.be.true
#component.set('dayOfWeek', 3)
expect(#component.get('inRange')).to.be.true
this is an ember unit test that fails with the error that is the is the title of this question.
If you're using Ember, try wrapping async calls in Ember.run => read this
What I understood is, if you're setting something #set(..,..) to the #store(), in the unit tests, and get this error, then you should use Ember.run =>
Also, remember the arrow has to be a fat arrow, (i made that mistake once of using -> instead of =>)it's because of javascript scope, read up on it if you are interested.
Solution: observe that I just added line # 2
it 'computes correctly when on & off have a list at cronRange[4]', ->
Ember.run =>
#component.set('cronRanges', [Ember.Object.create({
on: "* * * 3 3,1,5"
off: "* * * 3 3,1,5"
})])
#component.set('dayOfWeek', 2)
expect(#component.get('inRange')).to.be.false
#component.set('dayOfWeek', 5)
expect(#component.get('inRange')).to.be.true
#component.set('dayOfWeek', 1)
expect(#component.get('inRange')).to.be.true
#component.set('dayOfWeek', 3)
expect(#component.get('inRange')).to.be.true
Related
I am counting values in each window and find the top values and want to save only the top 10 frequent values of each window to hdfs rather than all the values.
eegStreams(a) = KafkaUtils.createStream(ssc, zkQuorum, group, Map(args(a) -> 1),StorageLevel.MEMORY_AND_DISK_SER).map(_._2)
val counts = eegStreams(a).map(x => (math.round(x.toDouble), 1)).reduceByKeyAndWindow(_ + _, _ - _, Seconds(4), Seconds(4))
val sortedCounts = counts.map(_.swap).transform(rdd => rdd.sortByKey(false)).map(_.swap)
ssc.sparkContext.parallelize(rdd.take(10)).saveAsTextFile("hdfs://ec2-23-21-113-136.compute-1.amazonaws.com:9000/user/hduser/output/" + (a+1))}
//sortedCounts.foreachRDD(rdd =>println("\nTop 10 amplitudes:\n" + rdd.take(10).mkString("\n")))
sortedCounts.map(tuple => "%s,%s".format(tuple._1, tuple._2)).saveAsTextFiles("hdfs://ec2-23-21-113-136.compute-1.amazonaws.com:9000/user/hduser/output/" + (a+1))
I can print top 10 as above (commented).
I have also tried
sortedCounts.foreachRDD{ rdd => ssc.sparkContext.parallelize(rdd.take(10)).saveAsTextFile("hdfs://ec2-23-21-113-136.compute-1.amazonaws.com:9000/user/hduser/output/" + (a+1))}
but I get the following error. My Array is not serializable
15/01/05 17:12:23 ERROR actor.OneForOneStrategy:
org.apache.spark.streaming.StreamingContext
java.io.NotSerializableException:
org.apache.spark.streaming.StreamingContext
Can you try this?
sortedCounts.foreachRDD(rdd => rdd.filterWith(ind => ind)((v, ind) => ind <= 10).saveAsTextFile(...))
Note: I didn't test the snippet...
Your first version should work. Just declare #transient ssc = ... where the Streaming Context is first created.
The second version won't work b/c StreamingContext cannot be serialized in a closure.
Let's say I am creating a reusable component in Ember, and I want a helper function that calls another helper function defined within. For example,
App.SomeCoolComponent = Ember.Component.extend
offset: 50
position: (x) -> x * 100
offsetPosition: # would like (x) -> position(x) + offset
So conceptually, return a function that would evaluate the position at x, add offset, and return value. Obviously this is a silly example and I could just write offSetPosition without calling position, but in a more complex scenario that is repeating code. The problem is I can't figure out how to get this to work. I tried
offsetPosition: (x) -> #get('position')(x) + #get('offset')
which fails because #get isn't defined within the function, it has the wrong scope. I've tried to insert things like Ember.computed in various places also with no luck, e.g. the following also doesn't work:
offsetPosition: Ember.computed(->
(x) -> #get('position')(x) + #get('offset')).property('position', 'offset')
What is the correct way of doing this?
Ember version 1.3.0-beta.1+canary.48513b24. Thanks in advance!
Edit: seems like my problem stems from passing the function into a d3 call. For example:
App.SomeCoolComponent = Ember.Component.extend
offset: 50
position: (d, i) -> i * 100
offsetPosition: (d, i) ->
#position(d, i) + #get('offset')
# Some other code not shown
didInsertElement: ->
data = [1, 2, 3]
i = 1
d = data[i]
console.log(#position(d, i)) # works
console.log(#offsetPosition(d, i)) # works
d3.select('svg').selectAll('circle').data(data).enter().append('circle')
.attr('cx', #position) # works
.attr('cy', #offsetPosition) # fails
.attr('r', 30)
The error message is Uncaught TypeError: Object #<SVGCircleElement> has no method 'position'
Any thoughts on how to resolve this issue?
The problem is that you are passing a function offsetPosition (which references this and expects it to point to App.SomeCoolComponent) to a D3 callback where this is replaced by the DOMElement.
You can solve the problem in two ways:
Using the fat arrow syntax:
d3.select('svg').selectAll('circle').data(data).enter().append('circle')
.attr('cx', #position) # works
.attr('cy', (d, i) => #offsetPosition(d, i))
.attr('r', 30)
Using bind explicitly:
d3.select('svg').selectAll('circle').data(data).enter().append('circle')
.attr('cx', #position) # works
.attr('cy', #offsetPosition.bind(this))
.attr('r', 30)
methods (aka not computed properties) are in the current context and should just be called like a method, and not with getters/setters.
offsetPosition: (x) ->
#position(x) + #get("offset")
position: (x) ->
x * 100
Here's an example: http://emberjs.jsbin.com/eWIYICu/3/edit
App.AnAppleComponent = Ember.Component.extend({
offset: 50,
position: function(x) {
return x * 100;
},
offsetPosition: function(x) {
return this.position(x) + this.get('offset');
},
displayOffset: function(){
return this.offsetPosition(Math.floor(Math.random() * 10) + 1);
}.property('offset')
});
Personally I'd create a mixin and add my methods in there, then add the mixin wherever that logic is needed. Mixins are in the scope of whatever they are added to.
BTW You can use Ember.Get(object, 'propertyOnObject') anywhere in the app.
In response to your edit, you are passing in methods into those attribute values instead of the values of those methods (which is why it works above, but not below). There is a good chance since you are sending in those methods jquery is applying those methods later way out of scope.
didInsertElement: ->
data = [1, 2, 3]
i = 1
d = data[i]
position = #position(d, i)
offsetPosition = #offsetPosition(d, i)
console.log position
console.log offsetPosition
d3.select("svg").selectAll("circle").data(data).enter().append("circle").attr("cx", position).attr("cy", offsetPosition).attr "r", 30
I have a feeling you are wanting this to dynamically update or something along those lines, if that's the case you really want to be using computed properties, the bacon of Ember. Here's an updated version of the apple component:
http://emberjs.jsbin.com/eWIYICu/5/edit
<div {{bind-attr style='dynamicStyle'}}>
dynamicStyle: function(){
var rgb = this.get('rgb'),
rgb1 = rgb * 21 % 255,
rgb2 = rgb * 32 % 255,
rgb3 = rgb * 41 % 255;
return 'background-color:rgb(' + rgb1 + ',' + rgb2 + ',' + rgb3 + ');';
}.property('rgb'),
I've got the following doctrine2 query working nicely, it retrieves all 'markers' within some geographical radius.
$qb->select('marker')
->from('SndSpecialistLocator\Entity\Marker', 'marker')
->where('DISTANCE(marker.location, POINT_STR(:point)) < :distance')
->setParameter('point', $point)
->setParameter('distance', $radius);
Now I want to sort them by distance.
$qb->select('marker (DISTANCE(marker.location, POINT_STR(:point))) AS distance')
->from('SndSpecialistLocator\Entity\Marker', 'marker')
->where('DISTANCE(marker.location, POINT_STR(:point)) < :distance')
->setParameter('point', $point)
->orderBy('distance', 'DESC')
->setParameter('distance', $radius);
But unfortunately this does not work, I am wondering is this possible as distance is not a real property of my entity, but a calculated one?
What is the trick here?
Alternatively, try using HIDDEN in your call to select() :
$qb->select('m as marker, (DISTANCE(m.location, POINT_STR(:point))) as HIDDEN distance')
// note HIDDEN added here --->------->------->------->------->------->---^
->from('SndSpecialistLocator\Entity\Marker', 'm')
->where('DISTANCE(m.location, POINT_STR(:point)) < :distance')
->setParameter('point', $point)
->orderBy('distance', 'ASC')
->setParameter('distance', $radius)
->setMaxResults(5);
$query = $qb->getQuery();
$result = $query->execute();
Adding HIDDEN to the SELECT clause hides it from the results but allows it to be used in the orderby clause. Your $result should then contain the objects you want without having to do the extra array_walk.
Unfortunately, ordering by aliases is not possible.
What you can do* instead is to manually repeat the function in your orderBy statement:
$qb->select('marker (DISTANCE(marker.location, POINT_STR(:point))) AS distance')
->from('SndSpecialistLocator\Entity\Marker', 'marker')
->where('DISTANCE(marker.location, POINT_STR(:point)) < :distance')
->setParameter('point', $point)
->orderBy('DISTANCE(marker.location, POINT_STR(:point))', 'DESC')
->setParameter('distance', $radius);
*We will probably all end up in dev-hell for stepping off the holy path of DRY
Found the solution.
$qb->select('m as marker, (DISTANCE(m.location, POINT_STR(:point))) as distance')
->from('SndSpecialistLocator\Entity\Marker', 'm')
->where('DISTANCE(m.location, POINT_STR(:point)) < :distance')
->setParameter('point', $point)
->orderBy('distance', 'ASC')
->setParameter('distance', $radius)
->setMaxResults(5);
$query = $qb->getQuery();
$result = $query->execute();
/**
* Convert the resulting associative array into one containing only the entity objects
*
* array (size=5)
* 0 =>
* array (size=2)
* 'marker' =>
* object(SndSpecialistLocator\Entity\Marker)[647]
* protected 'id' => int 43
* protected 'title' => string 'c5d07acdd47efbe38a6d0bf4ec64f333' (length=32)
* private 'location' =>
* object(SndSpecialistLocator\Orm\Point)[636]
* private 'lat' => float 52.2897
* private 'lng' => float 4.84268
* 'distance' => string '0.0760756823433058' (length=18)
* 1 => ...
*
* array (size=5)
* 0 =>
* object(SndSpecialistLocator\Entity\Marker)[647]
* protected 'id' => int 43
* protected 'title' => string 'c5d07acdd47efbe38a6d0bf4ec64f333' (length=32)
* private 'location' =>
* object(SndSpecialistLocator\Orm\Point)[636]
* private 'lat' => float 52.2897
* private 'lng' => float 4.84268
* 1 => ...
*
*/
array_walk($result, function (&$item, $key)
{
$item = $item['marker'];
});
I ve got the following class and I want to write some Spec test cases, but I am really new to it and I don't know how to start. My class do loke like this:
class Board{
val array = Array.fill(7)(Array.fill(6)(None:Option[Coin]))
def move(x:Int, coin:Coin) {
val y = array(x).indexOf(None)
require(y >= 0)
array(x)(y) = Some(coin)
}
def apply(x: Int, y: Int):Option[Coin] =
if (0 <= x && x < 7 && 0 <= y && y < 6) array(x)(y)
else None
def winner: Option[Coin] = winner(Cross).orElse(winner(Naught))
private def winner(coin:Coin):Option[Coin] = {
val rows = (0 until 6).map(y => (0 until 7).map( x => apply(x,y)))
val cols = (0 until 7).map(x => (0 until 6).map( y => apply(x,y)))
val dia1 = (0 until 4).map(x => (0 until 6).map( y => apply(x+y,y)))
val dia2 = (3 until 7).map(x => (0 until 6).map( y => apply(x-y,y)))
val slice = List.fill(4)(Some(coin))
if((rows ++ cols ++ dia1 ++ dia2).exists(_.containsSlice(slice)))
Some(coin)
else None
}
override def toString = {
val string = new StringBuilder
for(y <- 5 to 0 by -1; x <- 0 to 6){
string.append(apply(x, y).getOrElse("_"))
if (x == 6) string.append ("\n")
else string.append("|")
}
string.append("0 1 2 3 4 5 6\n").toString
}
}
Thank you!
I can only second Daniel's suggestion, because you'll end up with a more practical API by using TDD.
I also think that your application could be nicely tested with a mix of specs2 and ScalaCheck. Here the draft of a Specification to get you started:
import org.specs2._
import org.scalacheck.{Arbitrary, Gen}
class TestSpec extends Specification with ScalaCheck { def is =
"moving a coin in a column moves the coin to the nearest empty slot" ! e1^
"a coin wins if" ^
"a row contains 4 consecutive coins" ! e2^
"a column contains 4 consecutive coins" ! e3^
"a diagonal contains 4 consecutive coins" ! e4^
end
def e1 = check { (b: Board, x: Int, c: Coin) =>
try { b.move(x, c) } catch { case e => () }
// either there was a coin before somewhere in that column
// or there is now after the move
(0 until 6).exists(y => b(x, y).isDefined)
}
def e2 = pending
def e3 = pending
def e4 = pending
/**
* Random data for Coins, x position and Board
*/
implicit def arbitraryCoin: Arbitrary[Coin] = Arbitrary { Gen.oneOf(Cross, Naught) }
implicit def arbitraryXPosition: Arbitrary[Int] = Arbitrary { Gen.choose(0, 6) }
implicit def arbitraryBoardMove: Arbitrary[(Int, Coin)] = Arbitrary {
for {
coin <- arbitraryCoin.arbitrary
x <- arbitraryXPosition.arbitrary
} yield (x, coin)
}
implicit def arbitraryBoard: Arbitrary[Board] = Arbitrary {
for {
moves <- Gen.listOf1(arbitraryBoardMove.arbitrary)
} yield {
val board = new Board
moves.foreach { case (x, coin) =>
try { board.move(x, coin) } catch { case e => () }}
board
}
}
}
object Cross extends Coin {
override def toString = "x"
}
object Naught extends Coin {
override def toString = "o"
}
sealed trait Coin
The e1 property I've implemented is not the real thing because it doesn't really check that we moved the coin to the nearest empty slot, which is what your code and your API suggests. You will also want to change the generated data so that the Boards are generated with an alternation of x and o. That should be a great way to learn how to use ScalaCheck!
I suggest you throw all that code out -- well, save it somewhere, but start from zero using TDD.
The Specs2 site has plenty examples of how to write tests, but use TDD -- test driven design -- to do it. Adding tests after the fact is suboptimal, to say the least.
So, think of the most simple case you want to handle of the most simple feature, write a test for that, see it fail, write the code to fix it. Refactor if necessary, and repeat for the next most simple case.
If you want help with how to do TDD in general, I heartily endorse the videos about TDD available on Clean Coders. At the very least, watch the second part where Bob Martin writes a whole class TDD-style, from design to end.
If you know how to do testing in general but are confused about Scala or Specs, please be much more specific about what your questions are.
Is it possible to do something like this in SubSonic3?
_db.Update<Product>()
.Set("UnitPrice")
.EqualTo(UnitPrice + 5)
.Where<Product>(x=>x.ProductID==5)
.Execute();
I would need something lik this:
UPDATE Blocks
SET OrderId = OrderId - 1
WHERE ComponentId = 3
But in SubSonic3
I think you can here is a sample for demonstrating how you can use subsonic 3
// One thing you might not have seen with Linq To Sql is the ability to run Updates
//and Inserts, which I've always missed and have now implemented with SubSonic 3.0:
db.Update<Products>().Set(
x => x.Discontinued == false,
x => x.ReorderLevel == 100)
.Where(x=>x.Category==5)
.Execute();
db.Insert.Into<Region>(x => x.RegionID, x => x.RegionDescription)
.Values(6, "Hawaii")
.Execute();
and here a link to the full demonstration
i do it as a select
var model = ClassName.SingleOrDefault(x => x.id == 1);
model.name = "new name";
model.tel = " new telephone;
model.save();
done