function callback( value, aidx ) {
		return clbk.call( thisArg, aidx );
	}
Callback which wraps a provided callback and is invoked for each array element.

@private
@param {*} value - element value
@param {NonNegativeInteger} aidx - array index
@param {NonNegativeInteger} sidx - strided index
@param {Collection} array - input array/collection
@returns {*} callback return value