How do I remove a key from a JavaScript object?

[hannabone3445]

Let's say we have an object with this format:

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var thisIsObject= {
   'Cow' : 'Moo',
   'Cat' : 'Meow',
   'Dog' : 'Bark'
};

I wanted to do a function that removes by key:

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removeFromObjectByKey('Cow');

[Strider64]

Let's say we have an object with this format:

Code: Select all

var thisIsObject= {
   'Cow' : 'Moo',
   'Cat' : 'Meow',
   'Dog' : 'Bark'
};

I wanted to do a function that removes by key:

Code: Select all

removeFromObjectByKey('Cow');

just use delete thisisObject.cow and use a switch statement or if statements (I would use a switch statement)

[simonbrahan]

Your function will also need to accept the object.

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function removeFromObjectByKey(obj, propName) {
    delete obj[propName];
}

var foo = { a: 'able', b: 'baker' };

removeFromObject(foo, 'b');

The above will work. You're probably just as well using the "delete" call in a single line though.