The phrase "a pointer or a" is grammatically correct and can be used in written English.
It can be used when discussing options or alternatives, particularly in contexts involving programming, navigation, or guidance.
Example: "You can use a pointer or a reference to access the data structure."
Alternatives: "an indicator or a" or "a guide or a".
And while he is not advising Mr. Tourre in any formal way, Mr. Stoker could offer a pointer or two on how to beat a government case.
Politicians poised to sling mud might take a pointer or two from A. R. Gurney: Good manners can be lethal weapons, and a glancing sideswipe may cause more damage than a punch in the nose.
There are three basic types of hair: short (as on a pointer or Doberman pinscher), medium (as on an Irish setter or Siberian husky), and long (as on a chow chow or Maltese).
When a mechanical engraver is used to expose the metal for etching, a pointer or stylus is used to follow a usually enlarged pattern in a metal or plastic master stencil, causing a diamond stylus, which is in contact with the lacquer-covered plate surface, to remove the lacquer in a sharply defined pattern.
Indeed, the fact that, e.g., the wave function of the centre of mass of a pointer or of a table has not a compact support has never been taken to be a problem for standard quantum mechanics.
With the popularity of mobile devices, designing a keyboard for users who can only operate with a pointer or the eyes is a challenging task.
A computer keyboard, for example, is a manually-operated object used for the purpose of data entry, but the sensory-motor interactions required in the prototypical use of a keyboard are rather different from those required to use a screwdriver, a rake, a pointer, or the canes used to navigate by the blind.
If your dog is a pointer or flushes birds, play hide and seek.
The S3 Krypton is too powerful to be used as a laser pointer or a gunsight.
