Deleting an element from JS associative array [duplicate]

Question

Possible Duplicate:
JavaScript Array Delete Elements

How is this done?

If I have the following array defined:

var myArr = []; myArr[id1] = {prop1: prop1Value, prop2:prop2Value}; myArr[id2] = {prop1: prop1Value, prop2:prop2Value}; //etc

I wish to delete myArr[id1]

Dear Patricia, it's not a duplicate. No answer in the question above answers my question. If you think otherwise, it would be great if you posted some code that does. Regards. — sarsnake
– sarsnake, Commented Nov 17, 2011 at 19:06
Please note that this is an associative array so it lacks splice(), hence the "duplicate" question doesn't actually answer this one. Please actually READ the question before clicking to close. — sarsnake
– sarsnake, Commented Nov 17, 2011 at 19:27

sdleihssirhc · Accepted Answer · 2011-11-17 19:08:55Z

4

Perhaps you mean that the numerical indices after the deleted element aren't updated... in which case you'll need to use splice:

myArr.splice(id1, 1);

answered Nov 17, 2011 at 19:08

sdleihssirhc

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2 Comments

sarsnake Over a year ago

no splice() on associative arrays in JS

sdleihssirhc Over a year ago

@sarsnake Because associative arrays are just objects, and the only way to delete a property of an object is to use delete: delete myArr[id1];. The reason myArr[id1] still returns undefined is because that's what happens when you check a property that doesn't exist: myArr.fippetyFloppityFloo also returns undefined...

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