My current array is set as :
items=[{'id':1},{'id':2},{'id':3},{'id':4}];
Can you advise me on how to include a new pair {'id':5} in the existing array?
My current array is set as :
items=[{'id':1},{'id':2},{'id':3},{'id':4}];
Can you advise me on how to include a new pair {'id':5} in the existing array?
Implement the usage of .push:
items.push({'id':5});
The .push() method is used to append elements to the end of an array.
If you need to add an element to the beginning of an array, you can use the .unshift() method. For example:
items.unshift({'id':5});
Here's a demonstration:
items = [{'id': 1}, {'id': 2}, {'id': 3}, {'id': 4}];
items.unshift({'id': 0});
console.log(items);To add an object at a specific index in an array, you can use the .splice() method. For instance:
items.splice(2, 0, {'id':5});
// ^ The given object will be placed at index 2...
Check out this demo for reference:
items = [{'id': 1}, {'id': 2}, {'id': 3}, {'id': 4}];
items.splice(2, 0, {'id': 2.5});
console.log(items);There are instances where using .concat() is more advantageous than utilizing .push(). This is because .concat() will provide the new array as a return value, while .push() only gives the length of the array.
So, if you need to assign the outcome to a variable, opt for .concat().
items = [{'id': 1}, {'id': 2}, {'id': 3}, {'id': 4}];
newArray = items.push({'id':5})
In this example, the variable newArray will hold the value 5 (representing the length of the array).
newArray = items.concat({'id': 5})
Conversely, in this scenario, newArray will contain [{'id': 1}, {'id': 2}, {'id': 3}, {'id': 4}, {'id': 5}].
If you're using jQuery and dealing with form data serialization using serializeArray, here's an example:
var formData = $('#yourform').serializeArray();
// formData (array with objects):
// [{name: "firstname", value: "John"}, {name: "lastname", value: "Doe"}, etc]
If you need to append a key/value pair to this array with the same structure, like when sending a PHP ajax request, you can do the following:
formData.push({"name": "phone", "value": "1234-123456"});
Result:
// formData:
// [{name: "firstname", value: "John"}, {name: "lastname", value: "Doe"}, {"name":"phone","value":"1234-123456"}]
A fresh approach using ES6
Starting with the default object
object = [{'id': 1}, {'id': 2}, {'id': 3}, {'id': 4}];
Introducing another object
object = {'id': 5};
Utilizing Object assign in ES6
resultObject = {...obj, ...newobj};
The final outcome
[{'id': 1}, {'id': 2}, {'id': 3}, {'id': 4}, {'id': 5}];
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