I have a list of a custom object Product like this:
Product:[type=fruit, productValue=apple], Product:[type=fruit, productValue=pinapple], Product:[type=vegetable, productValue=potato],Product:[type=vegetable, productValue=carrot]
I want to obtain two lists due to the first value (type=fruit/vegetable), in Apex WITHOUT using a for cycle.
Expected result: fruitList=['apple','pinapple'] and vegetableList = =['potato','carrot']
How can I split them?
I suggest you can create a Wrapper class for Product with two variable type and productValue with String data type, as written below -
public class Product{
String type;
String productValue;
}
Then use the Wrapper instance to get the list of type and productValue easily with the help of JSON.serilize() and JSON.deserilize()
Please, let me know if it helps you out or not.
Thanks.
There is no way to split them without a loop. Unless you do it before you obtain the list. I would suggest either 2 queries to get the list of products, or just do the loop to split them up. Depends on where you are with governor limits.
Related
I was wondering if anyone has every had experience with breaking a string up in quicksight and using certain aspects of the string. My example is a data set that returns tags like this "animals|funny|dog-park" I have used "split(tags,'|',1)" but then all that gets returned is the first part(animals). I have also tried a combination of ifelse->locate->split with no luck. Is there a way to split these tags to where they are all usable (animals) & (funny) or (funny) & (dog-park), etc.? Say the article associated will then be broken up into one tag but also another separately? I know this will end up being a calculated field most likely. Thank you in advance!
Since QuickSight does not support any form of nested fields (including objects and list) in analysis, you need to normalise this into separate rows before feeding the data to QuickSight.
Otherwise, if you leave it as is, you would be limited to filtering using string contains and doing string lookup in calculated fields - nevertheless you would not be able to use these tags as categories (such as in colours field well of visuals).
I have a database where I store player names that belong to people who have certain items.
The items have and IDs, and subIDs.
The way I am currently storing everything is:
Each ID has its own collection
Within the collection there is a document for each subID.
The document for each subID is layed out like so:
{
"itemID":itemID,
"playerNames":[playerName1, playerName2, playerName3]
}
I need to be able to add to the list of playerNames quickly and efficiently.
Thank you!
If I understood your question correctly, you need to add items to the "playerNames" array. You can use one of the following operators:
If the player names array will have unique elements in it, use $addToSet
Otherwise, use $push
I'm starting with WEKA and want to achieve the following.
I have file with 2 attributes: user_id, user_age.
I can successfully load data using WEKA API and get Instances object.
Now I want to calculate new attribute user_age_range - like (0-18) - 0, (19-25) - 1, etc.
Is there a way to calculate this attribute using WEKA Filters?
Also I would like not to iterate manually through all instances, but to define method that operates on single Instance and use some filter (or other abstraction) that'll apply corresponding "transformation" to all instances.
Please advice - how I could achieve this.
Thanks in advance.
After looking through the docs I found one or two filters that you could use in conjunction to achieve what you want.
http://weka.sourceforge.net/doc.dev/weka/filters/unsupervised/attribute/Copy.html
Use copy to create a copy that you will transform.
http://weka.sourceforge.net/doc.dev/weka/filters/unsupervised/attribute/NumericTransform.html
The numeric transform takes a class and a method option, you could write your own class that boxes the ages into the ranges you want and supply this class and method as your options.
Hope this helps
Using a csv file you can do that on Excel.
If you are using arff files, convert it to csv and then you can add the columns that you want depending on the number of new attributes and then just do whatever you want to do with one or more atributes on the first row. Extend that to all rows and it's done.
I want to sort my Store models by their opening times. Store models contains is_open function which controls Store's opening time ranges and produces a boolean if it's open or not. The problem is I don't want to sort my queryset manually because of efficiency problem. I thought if I write a custom annotate function then I can filter the query more efficiently.
So I googled and found that I can extend Django's aggregate class. From what I understood, I have to use pre-defined sql functions like MAX, AVG etc. The thing is I want to check that today's date is in a given list of time intervals. So anyone can help me that which sql name should I use ?
Edit
I'd like to put the code here but it's really a spaghetti one. One pages long code only generates time intervals and checks the suitable one.
I want to avoid :
alg= lambda r: (not (s.is_open() and s.reachable))
sorted(stores,key=alg)
and replace with :
Store.objects.annotate(is_open = CheckOpen(datetime.today())).order_by('is_open')
But I'm totally lost at how to write CheckOpen...
have a look at the docs for extra
Can a SharePoint expert explain to me the ;# in data returned by the GetListItems() call to the Lists web service?
I think I understand what they are doing here. The ;# is almost like a syntax for making a comment... or better yet, including the actual data (string) and not just the ID. This way you can use either, but they are nicely paired together in the same column.
Am I way off base? I just can't figure out the slighly different use. For example
I have a list with:
ows_Author
658;#Tyndall, Bruno
*in this case the 658 seems to be an ID for me in a users table somewhere*
ows_CreatedDate (note: a custom field. not ows_Created)
571;#2009-08-31 23:41:58
*in this case the 571 seems to be an ID of the row I'm already in. Why the repetition?*
Can anyone out there shed some light on this aspect of SharePoint?
The string ;# is used as a delimiter by SharePoint's lookup fields, including user fields. When working with the object model, you can use SPFieldLookupValue and SPFieldUserValue to convert the delimited string into a strongly-typed object. When working with the web services, however, I believe you'll need to parse the string yourself.
You are correct that the first part is an integer ID: ID in the site user list, or ID of the corresponding item in the lookup list. The second part is the user name or value of the lookup column.
Nicolas correctly notes that this delimiter is also used for other composite field values, including...
SPFieldLookupValueCollection
SPFieldMultiColumnValue
SPFieldMultiChoiceValue
SPFieldUserValueCollection
The SPFieldUser inherits from the SPFieldLookup which uses the ;# notation. You can easily parse the value by creating a new instance of the SPFieldLookupValue class:
string rawValue = "1;#value";
SPFieldLookupValue lookupValue = new SPFieldLookupValue(rawValue);
string value = lookupValue.LookupValue; // returns value