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deleteEdit

Deletes any objects passed to it.

inEdit

In for...in loops, assigns each successive index owned by the right object into the left variable. Everywhere else, returns a Boolean which represents whether the right object has a property by the name of the left identifier.

instanceofEdit

Returns a Boolean which represents whether the first value is an instance of the right constructor.

newEdit

Returns a new instance of the constructor operand.

typeofEdit

Returns a string representing the argument's type. The possible strings represent only a subset of the literal types:

Type Result
Undefined "undefined"
Null "object"
Boolean "boolean"
Number "number"
String "string"
Function "function"
Anything else "object"

voidEdit

A useless legacy feature; returns undefined regardless of its operand. It is sometimes used to return false in javascript: URLs or to simply wrap a statement.

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