closure for struct of structs

[Trip]

Hey there, 

I have a struct of structures - 

Modifiers = {}

modifiers.mod1 = {}

modifiers.mod1.name = 'foo';

modifiers.mod1.isActive = 1;

modifiers.mod2 = {}

modifiers.mod2.name = 'boo';

modifiers.mod2.isActive = 1;

modifiers.mod3 = {}

modifiers.mod3.name = 'bar';

modifiers.mod3.isActive = 0;

There are actually about 20 structs though, and I am trying to write a closure that will loop over the struct with a function that will return all children structs where the key isActive is true. I can write this with a couple of loops but I know this can be done with either .filter or .each. I believe where I am stuck is the return on the closure has to be a single compassion.

here is what I have but the error is return type for filter is incorrect. If anyone has an example of a closure for a struct of structs or any hints, it would be greatly appreciated.

function filterMyStruct(struct a, function filter) {

        

        cfloop(collection=a , item="modifier"){

            // writeDump(var=a[modifier], label='label', top='5');abort;

            a[modifier].filter( function( k, v ) {

                if (k IS 'isActive' AND v IS TRUE) {

                     return true;

                } 

               

              } )

        }

        

    }

[Shane Pitts]

Probably because if the field doesn’t match, you aren’t returning anything from the function. It needs to either return true or false?

Try getting rid of the if statement and just 

return k IS 'isActive'  AND v IS TRUE

[Shane Pitts]

Also, if it’s a struct of structs do you need to use structFilter instead? It’s been a while since I’ve done any CF 

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[Trip]

yup that got me through it, but i believe this is where my closure knowledge is lacking . . .  that works and will return true, but i want the method to return all the structs which have the kei is active true. So intuition says i need to do a structAppend because in a loop but it feels like i am defeating the purpose of the filter.

function filterMyStruct(struct a, function filter) {

        local.myRtn = {};

        

        cfloop(collection=a , item="modifier"){

            // writeDump(var=a[modifier], label='label', top='5');abort;

            a[modifier].filter( function( k, v ) {

                return k IS 'isActive' AND v IS TRUE;

              } )

        }

        return local.myRtn;

        

    }

[Trip]

yes, I could use the StructFilter method as well, but opted for the member function. I could be wrong but i think they do they do the same thing.

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[Trip]

I also could be missing the boat completely and trying to filter isn't the right way to select structs where one key has a certain value.

[Shane Pitts]

How about 

myNewMap=myStruct.map(function(key,value){
 return value.isActive is 1;
});

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[Shane Pitts]

This is what you get with me trying to help looking at docs on my phone at 11 at night :). the map will just set all the outer keys to true or false

Try

Modifiers = {}
modifiers.mod1 = {}
modifiers.mod1.name = 'foo';
modifiers.mod1.isActive = 1;
modifiers.mod2 = {}
modifiers.mod2.name = 'boo';
modifiers.mod2.isActive = 1;
modifiers.mod3 = {}
modifiers.mod3.name = 'bar';
modifiers.mod3.isActive = 0;

filteredModifiers = Modifiers.filter(function(mod){
  return mod.isActiv == 1;
})

writeDump(filteredModifiers);

[Trip]

yea, it is 1 am here . . i'm on it. getting a Invalid CFML construct on filteredModifiers = Modifiers.filter(function(mod

I trying to figure it out . . .cant beleive you are helping on a phone . . lol

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[Shane Pitts]

Hmm odd. I don’t have a server setup that I can compile and run anything on, but that basically came from adobes docs https://coldfusion.adobe.com/2017/10/map-reduce-and-filter-functions-in-coldfusion/

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[Trip]

duuuude, you did it! I knew i was overthinking it - par for the course! I read the docs on map and couldn't seem to apply it to struct of structs.Totally appreciate the squinting and working through that! Happy Friday too

here's the final

myModifiers = {}

        myModifiers.mod1 = {}

        myModifiers.mod1.name = 'foo';

        myModifiers.mod1.isActive = 1;

        myModifiers.mod2 = {}

        myModifiers.mod2.name = 'boo';

        myModifiers.mod2.isActive = 1;

        myModifiers.mod3 = {}

        myModifiers.mod3.name = 'bar';

        myModifiers.mod3.isActive = 0;

        filteredModifiers = myModifiers.filter(function(modt) {

            return myModifiers[modt].isActive == 1;

        })

        writeDump(filteredModifiers);abort;

On Friday, June 5, 2020 at 1:03:19 AM UTC-4, shane wrote:

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[Shane Pitts]

That’s probably array syntax. You probably need to pass in key, value and then return value.isActive == 1

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[Trip]

as an aside, the invalid construct was because CF has a function called mod - so reserved word.

[Trip]

it was probably because it is 1:30, but when i read they were all simple values, i should have realized myModifiers.filter(function(modt) - modt is just the child struct

[Trip]

not it worked, on the return line i just needed to reference the full struct. i used [ ] because modt is eq to the key name in the child struct

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