* Mix properties into target object.

* Make a map and return a function for checking if a key * is in that map.

* Quick object check - this is primarily used to tell * Objects from primitive values when we know the value * is a JSON-compliant type.

* Strict object type check. Only returns true * for plain JavaScript objects.

* Create a cached version of a pure function.

* Cross-platform codegen helper for generating v-model value assignment code.

* Check if value is primitive

* Remove an item from an array

* Define a reactive property on an Object.

* Attempt to create an observer instance for a value, * returns the new observer if successfully observed, * or the existing observer if the value a

* Use function string name to check built-in types, * because a simple equality check will fail when running * across different vms / iframes.

* Check if two values are loosely equal - that is, * if they are plain objects, do they have the same shape?

* Merge two option objects into a new one. * Core utility used in both instantiation and inheritance.

* Ensure a function is called only once.

* Convert a input value to a number for persistence. * If the conversion fails, return original string.

* Recursively traverse an object to evoke all converted * getters, so that every nested property inside the object * is collected as a "deep" depend

* Define a property.