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 Australian selectors, on the other hand, have told Ponting the time to end his great career is near.
Before going to Sri Lanka and throughout the meeting I consulted the selectors and informed them and took their view point.
com The Selector is also on the air in Mexico, Columbia, Slovakia, Latvia, Hungary, Indonesia, Vietnam and China.
Current chairman of selectors David Graveney, who captained Durham and has held the post for more than 10 years, will therefore have to apply if he wants to try to keep his job.
It is proposed that the national selector would travel with the England team at all times, therefore ending the current policy of captain and coach selecting the final XI on tour.
The site also offers equally user-friendly selectors for cutting and laser gases.
Selector then chooses which songs will be played, and in what order, for the next 24 hours, seven days, or however far a horizon the program director requests.
The model 100D1788 is a five-port antenna selector that connects one R/T to the upper, lower, SATCOM or UHF/DF antenna.
Chief selector Iqbal Imam with members Sabih Azhar, Mohammad Jawed and Ashraf took the trials at Rawalpindi cricket stadium here on Rawalpindi, ahead of the teams to participated in Tri Nation Series witness Bangladesh and host England July 2018.