How to Push multiple Values to an Array in a single time

[Praveen.Illa]

Hi Team,

I am having an issue to Push multiple Values to an Array in a single time.
I am not good in QML programming.
Can someone please help me on this.

The ouput from the below code is
qml: Push = [object Object],[object Object]
qml: Pop = [object Object]

Please find below sample code

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    property var list: []

    Component.onCompleted: {

	list.push({"A001": "1"})
	console.log("Push = " + list) //expecting output to be {"A001","1"}
		
        list.push({"A002": "2"})
        console.log("Push = " + list) //expecting output to be {"A001","1"}, {"A002","2"}

        list.pop()
        console.log("Pop = " + list) //expecting output to be {"A001","1"}
    }
}

[lemons]

if you expect JSON key-value pairs as output, you have to push those as JSON objects to the list

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    property variant list: []
    property string str: "A001"
    property int value: 1

    // option 2
    property var object: ({})

    Component.onCompleted: {
        // option 1 - do it in js only
        let obj = {}
        obj[str] = value
        list.push(obj)
        console.log(JSON.stringify(list[0])) //expecting output to be {"A001",1}

        // option 2 - use property
        object[str] = value
        list.push(object)
        console.log(JSON.stringify(list[1])) //expecting output to be {"A001",1}

        // note if value should be of type string:
        object[str] = value.toString()
        list.push(object)
        console.log(JSON.stringify(list[2])) //expecting output to be {"A001","1"}
    }
}

[lemons]

As your list entries are JSON objects, you have to stringify them before logging.
Try this instead:

Component.onCompleted: {
    list.push({
                  "A001": "1"
              })
    // note that you can simply separate the log outputs with commas
    // no need for string concatenation
    console.log("Push =", JSON.stringify(list))

    list.push({
                  "A002": "2"
              })
    console.log("Push =", JSON.stringify(list))

    list.pop()
    console.log("Push =", JSON.stringify(list))
    
    // pushing multiple entries at once
    list.push({
                  "A002": "2"
              }, {
                  "A003": "3"
              }, {
                  "A004": "4"
              }, {
                  "A005": "5"
              })
    console.log("Push =", JSON.stringify(list))
}

[Praveen.Illa]

@lemons Thank you for your quick response and the solution provided.

But, if I pass the variable names to the push method, the console output is different like below
qml: [{"str":"A001","value":1}]

I am expecting output to be {"A001","1"}
How can I do this ?

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    property variant list: []
    property string str: "A001"
    property int value: 1

    Component.onCompleted: {

        list.push({str, value})
        console.log(JSON.stringify(list))  //expecting output to be {"A001","1"}
    }
}

[lemons]

if you expect JSON key-value pairs as output, you have to push those as JSON objects to the list

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    property variant list: []
    property string str: "A001"
    property int value: 1

    // option 2
    property var object: ({})

    Component.onCompleted: {
        // option 1 - do it in js only
        let obj = {}
        obj[str] = value
        list.push(obj)
        console.log(JSON.stringify(list[0])) //expecting output to be {"A001",1}

        // option 2 - use property
        object[str] = value
        list.push(object)
        console.log(JSON.stringify(list[1])) //expecting output to be {"A001",1}

        // note if value should be of type string:
        object[str] = value.toString()
        list.push(object)
        console.log(JSON.stringify(list[2])) //expecting output to be {"A001","1"}
    }
}

[Praveen.Illa]

@lemons
Thanks again and Sorry for troubling you again
I understood, how to store the key value pair in the list using json object.
But, one thing that is disturbing in my mind is, if I want to push 3 or 4 arguments to the list like below
({"A001", 1, "Item1"}, {"A002", 2, "Item2"})
How can I do this ? I know these are the basic things in js, but can't figure out the solution