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56 lines
1.1 KiB
56 lines
1.1 KiB
4 years ago
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## Alter Ego
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You can change your objects in multiple ways:
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- modify values of properties
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- add new properties
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- delete properties
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### Modifying objects
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Let's declare an object
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```js
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// we create our object with 2 properties
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const user = {
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points: 0,
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code: '75lai78wn',
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}
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```
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#### Adding a new properperty
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```js
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user.name = 'Martin' // we add a name to our user
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```
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The syntax is very similar to modifying a variable, the only difference is we
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start **from** our user and use the `.` _(property accessor operator)_
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#### Changing a property value
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```js
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user.points = 10 // set points to 10 points
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```
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The syntax is the same, if the property already exist, its value will be changed
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!
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#### Removing a property
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```js
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user.code = undefined // remove the value from a property
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```
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The trick here is to set its value to `undefined` as this will clear the value
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of our property
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### Instructions
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Modify the provided `alterEgo` variable:
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- add a `self` property with the string value `'altered'`.
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- add a `fullName` property that is the joined value of the `firstName` and the
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`lastName` with a space in between.
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- add `10` to it's `points` property
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