selector


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selector

[si′lek·tər]
(civil engineering)
A device that automatically connects the appropriate railroad signal to control the track selected.
(computer science)
Computer device which interrogates a condition and initiates a particular operation dependent upon the report.
(electricity)
An automatic or other device for making connections to any one of a number of circuits, such as a selector relay or selector switch.
(engineering)
A device for selecting objects or materials according to predetermined properties.
A device for starting or stopping at predetermined positions.
(mechanical engineering)
The part of the gearshift in an automotive transmission that selects the required gearshift bar.
The lever with which a driver operates an automatic gearshift.
(metallurgy)
A converter that separates purified copper from residue in a single operation.

Selector

 

an electromechanical device for the reception of calls in a selective telephone communication system. Selectors have been used predominantly in railroad systems. The call signal of a subscriber consists of a code, or series of electric pulses. The selector is tuned to a certain coded combination of pulses and operates—for example, rings a bell—only when the corresponding call signal is transmitted through the telephone line. In the 1960’s selector systems were supplanted by improved systems based on harmonic selective ringing. [23-S75–2]

selector

(programming)
1. In Smalltalk or Objective C, the syntax of a message which selects a particular method in the target object.

2. An operation that returns the state of an object but does not alter that state. Selector functions or methods often have names which begin with "get" and corresponding modifier methods or procedures whose names begin with "set".
References in periodicals archive ?
The Indian selectors are still mum, allowing the drama of a rotation among the top three players Tendulkar, Gautam Gambhir and the out-of-form Virender Sehwag to play on, and to damaging consequences.
These antenna selectors utilize high reliability MIL-qualified (QPL) electromechanical relays as switching elements and have tri-level mode select logic, including upper, lower and auto.
'I absorbed immense criticism during my time as the chief selector,' he stated.
'Chief Selector, Inzamam-ul-Haq called on Chairman PCB, Ehsan Mani today at PCB,' said a news release.
In the meeting, the chief selector discussed matters related to him being highlighted in the media that he made a phone call to the chairman, National Junior Selection Committee, Basit Ali regarding selection of his son to the junior team.
ISLAMABAD -- Test-discarded wicketkeeper opening batsman Kamran Akaml has expressed his utter disappointment for being continuously ignored by the selectors.
The team is a fine blend of experience and youth, and the selectors have stick to the same combination of players selected against England and West Indies series earlier and believe that team will do well in the tour, said chief selector Inzamam ul Haq.
We wouldn't advise further work on the selector. Though chamber size and length is specified by SAMMI in this country, all ammo may not be exactly alike.
22, and the number of QHP selectors in each state who are new to the exchange system.
THE M224/M224A1 60MM MORTAR CAN FIRE IF THE HANDLE AND FIRING MECHANISM (H&FM) SELECTOR SWITCH IS PLACED BETWEEN S (SAFE) AND D (DROP) POSITIONS WHEN THE TRIGGER IS SQUEEZED.
Recently, while reporting on the Maxtalent Inter-University cricket final between American University of Sharjah and Manipal University at the Fairgrounds Oval, I noticed there was not one selector present there.
No fuel was found from the fuel selector valve forward to the engine-driven fuel pump.