What's the easiest way to log all the properties of an object in SenseTalk?
Like this C# example but for eggplant scripting?
In sense talk objects are represented as propertyLists. You can iterate over the keys of an object using the exact same syntax as you would with a propertyList.
set mike to {current:["Mike and the Mechanics","Genesis"],previous:"Red 7"}
repeat with each item of keys(mike)
put it & ": " & property (it) of mike
end repeat
// current: [Mike and the Mechanics,Genesis]
// previous: Red 7
Related
I'm trying to write the derivation expression for the sum of a to many relationship attribute.
I have an item and a group, the item has a price and total price (amount * price).
I want to write an expression for the total price for the group as the sum of its components.
When I build I get the error
error: Misconfigured Property: LAEItemGroup.totalPrice key path
“items.#sum.totalPrice” uses an operator as an intermediate
component
according to the documentation and the WWDC 2019 Making Apps with Core Data it should be possible to get the sum on a to many relationship.
Could someone please help me find the correct syntax or way to do so.
As a work around I tried to write a var that worked in that class as so
#objc
public var totalPrice: Double {
value(forKeyPath: "items.#sum.totalPrice") as? Double ?? 0
}
so why the KeyPath value works but not in the model editor?
I just finished a WWDC Core Data lab with Rishi who helped me with this! You should use sum:(items.totalPrice) instead of the .#sum syntax. The parentheses syntax can also be used for some other functions (e.g. count:(items) (the number of items in the to-many relationship) or max:(items.createdAt) (the date of the most recent item)).
I've now had an opportunity to check. It seems the format used by the model editor is for the aggregate operator to be at the end of the expression (which as you point out, is different from the format used in other expressions):
items.totalPrice.#sum
Use items.totalPrice.#sum as the derived property's expression in Xcode's model editor.
This only looks to work for numeric types though? I have a property maxDate with a derived property expression of
items.createdAt.#max
It compiles but throws an error at runtime:
'NSInvalidArgumentException', reason: 'currently unsupported (too many steps)
Where Date is the data type for createdAt
I recently started checking new Java 8 features.
I've come across this forEach iterator-which iterates over the Collection.
Let's take I've one ArrayList of type <Integer> having values= {1,2,3,4,5}
list.forEach(i -> System.out.println(i));
This statement iteates over a list and prints the values inside it.
I'd like to know How am I going to specify that I want it to iterate over some specific values only.
Like, I want it to start from 2nd value and iterate it till 2nd last value. or something like that- or on alternate elements.
How am I going to do that?
To iterate on a section of the original list, use the subList method:
list.subList(1, list.length()-1)
.stream() // This line is optional since List already has a foreach method taking a Consumer as parameter
.forEach(...);
This is the concept of streams. After one operation, the results of that operation become the input for the next.
So for your specific example, you can follow #Joni's command. But if you're asking in general, then you can create a filter to only get the values you want to loop over.
For example, if you only wanted to print the even numbers, you could create a filter on the streams before you forEached them. Like this:
List<Integer> intList = Arrays.asList(1,2,3,4,5);
intList.stream()
.filter(e -> (e & 1) == 0)
.forEach(System.out::println);
You can similarly pick out the stuff you want to loop over before reaching your terminal operation (in your case the forEach) on the stream. I suggest you read this stream tutorial to get a better idea of how they work: http://winterbe.com/posts/2014/07/31/java8-stream-tutorial-examples/
I have a field which value is an array of strings.
Example: Mom, dad, son, etc.
It is possible to repeat a link with those values?
Example:
Mom
dad
son
And when I click on the link to have a href=www."fieldvalue".com.
EDIT: it is not vector, it is Array.
Create your repeat control. For the value add in your field name. Something like :
document1.getItemValue("myMultiValueField")
I THINK that should repeat your field assuming it is a real multi-value. The comma deliminated string would require more work. So I'm not talking about that...
Make sure the collection name / var name of the repeat is something like "rowData"
rowData should then be a String.
Drop a link control inside the repeat.
Compute the label to be simple "rowData". (no quotes in the code)
Compute the URL - which I THINK is "value" in all properties of the link
That's just javaScript so you should be able to do something like:
return "http://" + rowData + ".com"
That's rough - you'll have to play with it but if I follow you correctly should work.
For a comma deliminated String... in the repeat control you'd need to use SSJS or #functions to break that into an array so the repeat can work on it.
In your repeat you'll need to map the value attribute to the Vector and set a var property, which is how you will reference each element. Note: a comma-separated string is a single value, and a repeat requires multiple values. So you'll need to convert it to a Vector or some other multi-value object.
Within the repeat you can use any other control and compute the value as you would elsewhere. To access each element in your repeat control's source (i.e. each String in your Vector, in this case), use the variable name you've defined in the var property.
I have a data set in SPSS containing a sequence of six variables from which I have to create a new variable which should contain the last value present in the sequence. Let's say the data look like this: (the second row contains all missing values but represents a case to which I'll merge some other variables later, so I need this too.)
DATA LIST /V1 TO V6 1-6.
BEGIN DATA
423451
73453
929
0257
END DATA.
Now if I wish to generate a variable named lastscr which should have values 1, ., 3, 9, 7. Can anyone help me on how should I do it in SPSS? I could not find any clue about it. Thank you in advance for any help.
This can easily be done with the DO REPEAT command:
DO REPEAT Var = V1 TO V6.
IF NOT(SYSMIS(Var)) lastscr = Var.
END REPEAT.
How to create an array in VTL and add contents to the array? Also how to retrieve the contents of the array by index?
According to Apache Velocity User Guide, right hand side of assignments can be of type
Variable reference
List item
String literal
Property reference
Method reference
Number literal
ArrayList
Map
You can create an empty list, which would satisfy all your needs for an array, in an Apache Velocity template with an expression like:
#set($foo = [])
or initialize values:
#set($foo = [42, "a string", 21, $myVar])
then, add elements using the Java add method:
$foo.add(53);
$foo.add("another string");
but beware, as the Java .add() method for the list type returns a boolean value, when you add an element to the list, Velocity will print, for instance, "true" or "false" based on the result of the "add" function.
A simple work around is assigning the result of the add function to a variable:
#set($bar = $foo.add(42))
You can access the elements of the list using index numbers:
<span>$foo[1]</span>
Expression above would show a span with the text "a string". However the safest way to access elements of a list is using foreach loops.
Creating an array is easy:
#set($array = [])
Putting an element into an array is also easy:
$array.add(23)
Getting an element from an array depends from your Velocity version.
In Velocity 1.6 you must use
$array.get($index)
Since Velocity 1.7 you can use the classic form:
$array[$index]
I haven't created an array in VTL but passed arrays to VTL context and used them. In VTL, you can not retrieve array contents by index, you only use foreach, as example this code is copied from my Dynamic SQL generation VTL Script:
#foreach( $col in $Columns ) SUM($col.DBColumn) AS ''$col.Name''#if($velocityCount!=$Columns.Count), #end #end
For this reason, we also can not have 2D arrays. When I needed an array to store 2 objects in a row, I used the workaround of defining a new class, and putting objects of that class in the single dimensional array.