I want to be able to remove duplicated items in an array in Watson Assistant.
For example if we have the following array in a context variable:
["Apple","Orange","Apple","Banana","cherries", "Orange"]
I need it converted to:
["Apple","Orange","Banana","cherries"]
Not sure if possible, but it worth it to take a look at SpEL:
https://cloud.ibm.com/docs/assistant?topic=assistant-dialog-methods#dialog-methods-arrays-filter
You can you the filter operator to filter an array directly from the dialog.
Also the remove operator might be helpful: https://cloud.ibm.com/docs/assistant?topic=assistant-dialog-methods#dialog-methods-arrays-removeValue
Related
I have an array in Mule that I am iterating over. I believe the for each makes a copy of the array I pass it and iterates through that. Is it possible to access that copy by reference and modify it? Based on certain conditions I would like to add extra elements to the array. I have tried to use vars.rootMessage but it does not give me what I am expecting.
No. Just create a new array in a variable and add to it. To provide more context, Mule 4 variables live in Mule Events, which are immutable. That means that a change results in the creation of a new event.
I am using Azure Data Factory. I'm trying to use a String variable to lookup a Key in a JSON array and retrieve its Value. I can't seem to figure out how to do this in ADF.
Details:
I have defined a Pipeline Parameter named "obj", type "Object" and content:
{"values":{"key1":"value1","key2":"value2"}}
Parameter definition
I need to use this pipeline to find a value named "key1" and return it as "value1"; "key2" and return it as "value2"... and so on. I'm planning to use my "obj" as a dictionary, to accomplish this.
Technically speaking, If i want to find the value for key2, I can use the code below, and it will be returned "value2":
#pipeline().parameters.obj.values.key2
What i can't figure out is how to do it using a variable (instead of hardcoded "key2").
To clear things out: I have a for-loop and, inside it, i have just a copy activity: for-each contents
The purpose of the copy activity is to copy the file named item().name, but save it in ADLS as whatever item().name translates to, according to "obj"
This is how the for-loop could be built, using Python: python-for-loop
In ADF, I tried a lot of things (using concat, replace...), but none worked. The simpliest woult be this:
#pipeline().parameters.obj.values.item().name
but it throws the following error:
{"code":"BadRequest","message":"ErrorCode=InvalidTemplate, ErrorMessage=Unable to parse expression 'pipeline().parameters.obj.values.item().name'","target":"pipeline/name_of_the_pipeline/runid/run_id","details":null,"error":null}
So, can you please give any ideas how to define my expression?
I feel this must be really obvious, but I'm not getting there.....
Thanks.
Hello fellow Pythonista!
The solution in ADF is actually to reference just as you would in Python by enclosing the 'variable' in square brackets.
I created a pipeline with a parameter obj like yours
and, as a demo, the pipeline has a single Set Variable activity that got the value for key2 into a variable.
This is documented but you need X-ray vision to spot it here.
Based on your comments, this is the output of a Filter activity. The Filter activity's output is an object that contains an array named value, so you need to iterate over the "output.value":
Inside the ForEach you reference the name of the item using "item().name":
EDIT BASED ON MORE INFORMATION:
The task is to now take the #item().name value and use it as a dynamic property name against a JSON array. This is a bit of a challenge given the limited nature of the Pipeline Expression Language (PEL). Array elements in PEL can only be referenced by their index value, so to do this kind of complex lookup you will need to loop over the array and do some string parsing. Since you are already inside a FOR loop, and nested FOR loops are not supported, you will need to execute another pipeline to handle this process AND the Copy activity. Warning: this gets ugly, but works.
Child Pipeline
Define a pipeline with two parameters, one for the values array and one for the item().name:
When you execute the child pipeline, pass #pipeline.parameters.obj.values as "valuesArray" and #item().name as "keyValue".
You will need several string parsing operations, so create some string variables in the Pipeline:
In the Child Pipeline, add a ForEach activity. Check the Sequential box and set the Items to the valuesArray parameter:
Inside the ForEach, start by cleaning up the current item and storing it as a variable to make it a little easier to consume.
Parse the object key out of the variable [this is where it starts to get a little ugly]:
Add an IF condition to test the value of the current key to the keyValue parameter:
Add an activity to the TRUE condition that parses the value into a variable [gets really ugly here]:
Meanwhile, back at the Pipeline
At this point, after the ForEach, you will have a variable (IterationValue) that contains the correct value from your original array:
Now that you have this value, you can use that variable as a DataSet parameter in the Copy activity.
Suppose I have a simple map, example-map:
(def example-map {"s" {"f" "g"}
"m" {"r" "q"}})
I can use clojure.data.json/write-str to JSON-ify this map as such:
(clojure.data.json/write-str example-map) =>
"{\"s\":{\"f\":\"g\"},\"m\":{\"r\":\"q\"}}"
I'd like to conditionally place some of the values into lists according to the value of their keys.
write-str provides an optional :key-fn, which applies some function to key value pairs. For example, the desired function might specify that all values associated with entries that match "s" are placed in lists.
(clojure.data.json/write-str example-map :key-function desired-function) =>
"{\"s\":[{\"f\":\"g\"}],\"m\":{\"r\":\"q\"}}"
Does anyone know how to specify such a key function that checks for membership of a key in a set and places the values associated with members into an array rendered in the output JSON?
Like your previous question, this is not a job for the JSON parser. You don't need to rely on write-time features of your JSON library to adjust the shape of your JSON maps. Instead, you have a fully functional Turing complete language at your disposal: Clojure! If the maps don't already look the way you want them to be output, then write a function that takes one Clojure map as input and produces a different one as output; then ask your JSON library to write the output map, without any special rules for fiddling with the output.
Now, as it happens this particular JSON library does provide an option named value-fn (not key-function as you claim) to let you modify a value in a map based on its key. So you could use that, in which case you simply need to write a function with a signature like:
(fn [k v]
(...compute new value...))
There are many ways you could write such a function, but they are all entirely divorced from your JSON parser. If you need help writing it, mention some specific things you need help with, so you can get a clear explanation for the part of the process that is actually giving you trouble.
I got an anonymous array which I want to deserialize, here the example of the first array object
[
{ "time":"08:55:54",
"date":"2016-05-27",
"timestamp":1464332154807,
"level":3,
"message":"registerResourcePath ('', '/sap/bc/ui5_ui5/ui2/ushell/resources/')",
"details":"","component":"sap.ui.ModuleSystem"},
{"time":"08:55:54","date":"2016-05-27","timestamp":1464332154808,"level":3,"message":"URL prefixes set to:","details":"","component":"sap.ui.ModuleSystem"},
{"time":"08:55:54","date":"2016-05-27","timestamp":1464332154808,"level":3,"message":" (default) : /sap/bc/ui5_ui5/ui2/ushell/resources/","details":"","component":"sap.ui.ModuleSystem"}
]
I tried deserializing using CL_TREX_JSON_SERIALIZER, but it is corrupt and does not work with my JSON, here is why
Then I tried /UI2/CL_JSON, but it needs a "structure" that perfectly fits the object given by the JSON Object. "Structure" means in my case an internal table of objects with the attributes time, date, timestamp, level, messageanddetails. And there was the problem: it does not properly handle references and uses class description to describe the field assigned to the field-symbol. Since I can not have a list of objects but only a list of references to objects that solution also doesn't works.
As a third attempt I tried with the CALL TRANSFORMATION as described by Horst Keller, but with this method I was not able to read in an anonymous array, and here is why
My major points:
I do not want to change the JSON, since that is what I get from sap.ui.log
I prefere to use built-in functionality and not a thirdparty framework
Your problem comes out not from the anonymity of array, but from the awkwardness of SAP JSON (De)serializer, which doesn't respect double quotes, which enclose JSON attributes. The issue is thoroughly described in this answer.
If you don't want to change your JSON on-the-fly, the only way you have is to change CL_TREX_JSON_DESERIALIZER class like this.
/UI5/CL_JSON_PARSER parses JSONs with unknown format.
Note that it's got "for internal use" written on it so many times that you probably should take it seriously and clone its code to fixate it.
I am trying to add data from the Scope to an Array.
In my example I have $scope.employee which have several other fields, like name, number, email, etc.
So when I push the data to the Array I use:
array.push($scope.employee);
This works, because it adds the data to the array, but the binding still applies, so if I later on change thing in the scope, the data in the array also changes. I want this array to be static and not change. Just to hold the elements I have passed into it.
I would like to only add the data from the $scope.employee and not the binding.
I know it's possible to:
array.push({name: $employee.name, number: $employee.number});
But the $scope.employee have many fields, therefore I want to push the whole object.
You want to use angular.copy to make a deep copy without the pointers.
array.push(angular.copy($scope.employee));
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