Reference argument passing

Question

Reference argument passing

Below is a snippet of JavaScript code I am using:

function insertIntoTable(title, text, sketchFileName, categoryId)
{
    var db = window.openDatabase('xxx', '1.0', 'xxx database', 5*1024*1024);
    db.transaction(
        function (tx) {
            if (sketchFileName == '')
            {
                tx.executeSql('INSERT INTO TableXXX (title, content, created, categoryID) VALUES (?, ?, ?, ?)', 
                            [title, text, Date.now(), categoryId], 
                            function (transaction, resultSet) {
                                if (resultSet.rowsAffected) {
                                    myNameSpace.returnedId = resultSet.insertId;
                                }
                            }, handleSQLError);
            }
        }, handleSQLError);
    );
}

Currently, I am using a global variable, myNameSpace.returnedId, to capture the insertId.

Is there a way to modify the function insertIntoTable to include a new parameter that points to myNameSpace.returnedId?

javascript function reference arguments

Answer 1

Answer №1

To access the variable with two arguments, you can use the following function:

function addToTable(title, content, fileName, id, space, variable)
{
    ...
    space[variable] = finalResult.insertId;
}

Invoke it in this manner:

addToTable( ..., mySpace, 'resultId' );

Another approach is to employ a setter function:

function addToTable(title, content, fileName, id, setReturnId)
{
    setReturnId( finalResult.insertId );

}

Invoke it like this:

addToTable( ..., function(value){ mySpace.resultId = value } );

Answer 2

To access the variable with two arguments, you can use the following function:

function addToTable(title, content, fileName, id, space, variable)
{
    ...
    space[variable] = finalResult.insertId;
}

Invoke it in this manner:

addToTable( ..., mySpace, 'resultId' );

Another approach is to employ a setter function:

function addToTable(title, content, fileName, id, setReturnId)
{
    setReturnId( finalResult.insertId );

}

Invoke it like this:

addToTable( ..., function(value){ mySpace.resultId = value } );

Answer 3

Answer №2

Modify the function as shown below:

function addToTable(title, content, file, category, namespace) {
...
...
namespace.returnedId = result.insertId; // set the value here

Then, use the function like this:

addToTable(myTitle, myContent, myFileName, myCategory, myNamespace)

Remember to pass a reference to myNamespace (referred to as namespace within the function). This way, you can access and update all attributes of myNameSpace.

Answer 4

Modify the function as shown below:

function addToTable(title, content, file, category, namespace) {
...
...
namespace.returnedId = result.insertId; // set the value here

Then, use the function like this:

addToTable(myTitle, myContent, myFileName, myCategory, myNamespace)

Remember to pass a reference to myNamespace (referred to as namespace within the function). This way, you can access and update all attributes of myNameSpace.

Reference argument passing

Answer №1

Answer №2

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