Adding a large quantity of data to a JavaScript object at once

Question

Adding a large quantity of data to a JavaScript object at once

I am trying to find a way to efficiently add multiple items to an object without having to individually assign each one like messageStrings.x = 1.

For instance, let's say in one file we have:

var messageStrings = {
     Edit: "Edit",
     Cancel: "Cancel"
}

And in another file, I want to append more items to the existing object:

var messageStrings = {
    Update: "Update",
    Save: "Save"
}

What is the optimal method for bulk adding new items to an already established object?

Thank you.

javascript

Answer 1

Answer №1

Most libraries include a handy "extend" feature, enabling you to achieve tasks like this:

var example = extend({ "default": "something"}, { "more": "stuff", "even": "more" });

This will result in an object containing properties "default", "more", and "even."

The actual implementation of the function is as follows:

function extend() {
  var parameters = Array.prototype.slice.call(arguments, 0);

  var targetObject = parameters[0];
  for (var index = 1; index < parameters.length; ++index) {
    for (var key in parameters[index]) {
      targetObject[key] = parameters[index][key];
    }
  }
  return targetObject;
}

It's important to note that different implementations may have slightly different behaviors, such as whether to always generate a new object as a result or to modify the initial parameter in place.

Additionally, keep in mind that this constitutes a shallow copy — for a complete "deep" copy, more extensive code would be necessary.

Answer 2

Most libraries include a handy "extend" feature, enabling you to achieve tasks like this:

var example = extend({ "default": "something"}, { "more": "stuff", "even": "more" });

This will result in an object containing properties "default", "more", and "even."

The actual implementation of the function is as follows:

function extend() {
  var parameters = Array.prototype.slice.call(arguments, 0);

  var targetObject = parameters[0];
  for (var index = 1; index < parameters.length; ++index) {
    for (var key in parameters[index]) {
      targetObject[key] = parameters[index][key];
    }
  }
  return targetObject;
}

It's important to note that different implementations may have slightly different behaviors, such as whether to always generate a new object as a result or to modify the initial parameter in place.

Additionally, keep in mind that this constitutes a shallow copy — for a complete "deep" copy, more extensive code would be necessary.

Answer 3

Answer №2

One way to achieve this in TypeScript is by creating message variables:

const messages = {
 Edit: "Edit",
 Cancel: "Cancel"
}
const moreMessages = {
 Update: "Update",
 Save: "Save"
}
let combinedMessages = {...messages, ...moreMessages}

When you combine the two objects, you will get:

{Edit: "Edit", Cancel: "Cancel", Update: "Update", Save: "Save"}

Answer 4

One way to achieve this in TypeScript is by creating message variables:

const messages = {
 Edit: "Edit",
 Cancel: "Cancel"
}
const moreMessages = {
 Update: "Update",
 Save: "Save"
}
let combinedMessages = {...messages, ...moreMessages}

When you combine the two objects, you will get:

{Edit: "Edit", Cancel: "Cancel", Update: "Update", Save: "Save"}

Answer 5

Answer №3

If you are utilizing jQuery, you have the option to extend an object in the following manner:

$.extend(objA, objB);

By doing this, you will create an object that incorporates properties from both A and B.

Alternatively, you could implement a straightforward for in loop like this:

for (var i in myObj2) {
  myObj1[i] = myObj2[i];
}

This is merely a demonstration; it is advised to conduct checks in order to prevent data from being accidentally overwritten.

Answer 6

If you are utilizing jQuery, you have the option to extend an object in the following manner:

$.extend(objA, objB);

By doing this, you will create an object that incorporates properties from both A and B.

Alternatively, you could implement a straightforward for in loop like this:

for (var i in myObj2) {
  myObj1[i] = myObj2[i];
}

This is merely a demonstration; it is advised to conduct checks in order to prevent data from being accidentally overwritten.

Answer 7

Answer №4

One way to combine new values with an existing object is by using jQuery's extend method.

If you prefer not to use jQuery, you can create a basic recursive function to merge the values, making sure to check for hasOwnProperty to avoid any conflicts with properties on Object.prototype.

Answer 8

One way to combine new values with an existing object is by using jQuery's extend method.

If you prefer not to use jQuery, you can create a basic recursive function to merge the values, making sure to check for hasOwnProperty to avoid any conflicts with properties on Object.prototype.

Adding a large quantity of data to a JavaScript object at once

Answer №1

Answer №2

Answer №3

Answer №4

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