How to correspond string to specific number and number to specific string












0















Lets say we have:





  • 0: "APPLE"


  • 1: "ORANGE"


  • 2: "GRAPES"

  • ...


Is there a structure in JavaScript that allows me to get "ORANGE" from 1 and 1 from "ORANGE"? I remembered there was such a thing (not Object or Array) but can't remember its name, and I couldn't figure out a way to Google it without already knowing what it's called :(



Unless what I'm remembering is from ruby, not JS? In which case what do you call this?



EDIT



I am aware that Object and Array can achieve the same result. At this point I just really want to know if there's a specific structure for it, and what its name is, because I thought I remembered seeing it somewhere, either in JS or ruby. Please tell me what it's called, or tell me it doesn't exist, so I can have an ease of mind again..



For JS, I don't think it is Map either, because the value -> key direction still needed a bit of work.






javascript







share|improve this question




















  • 2





    maybe you are looking for Map

    – Nina Scholz
    Nov 16 '18 at 10:10











  • You can easily do that with an object, though

    – CertainPerformance
    Nov 16 '18 at 10:14











  • @CertainPerformance Anyway getting key from value would require some loop, though

    – hindmost
    Nov 16 '18 at 10:17








  • 1





    Possible duplicate of How can I create a two-way mapping in JavaScript, or some other way to swap out values?

    – Jeto
    Nov 16 '18 at 10:17











  • @hindmost It's trivial though, and so would a Map, right?

    – CertainPerformance
    Nov 16 '18 at 10:18


















0















Lets say we have:





  • 0: "APPLE"


  • 1: "ORANGE"


  • 2: "GRAPES"

  • ...


Is there a structure in JavaScript that allows me to get "ORANGE" from 1 and 1 from "ORANGE"? I remembered there was such a thing (not Object or Array) but can't remember its name, and I couldn't figure out a way to Google it without already knowing what it's called :(



Unless what I'm remembering is from ruby, not JS? In which case what do you call this?



EDIT



I am aware that Object and Array can achieve the same result. At this point I just really want to know if there's a specific structure for it, and what its name is, because I thought I remembered seeing it somewhere, either in JS or ruby. Please tell me what it's called, or tell me it doesn't exist, so I can have an ease of mind again..



For JS, I don't think it is Map either, because the value -> key direction still needed a bit of work.






javascript







share|improve this question




















  • 2





    maybe you are looking for Map

    – Nina Scholz
    Nov 16 '18 at 10:10











  • You can easily do that with an object, though

    – CertainPerformance
    Nov 16 '18 at 10:14











  • @CertainPerformance Anyway getting key from value would require some loop, though

    – hindmost
    Nov 16 '18 at 10:17








  • 1





    Possible duplicate of How can I create a two-way mapping in JavaScript, or some other way to swap out values?

    – Jeto
    Nov 16 '18 at 10:17











  • @hindmost It's trivial though, and so would a Map, right?

    – CertainPerformance
    Nov 16 '18 at 10:18
















0












0








0








Lets say we have:





  • 0: "APPLE"


  • 1: "ORANGE"


  • 2: "GRAPES"

  • ...


Is there a structure in JavaScript that allows me to get "ORANGE" from 1 and 1 from "ORANGE"? I remembered there was such a thing (not Object or Array) but can't remember its name, and I couldn't figure out a way to Google it without already knowing what it's called :(



Unless what I'm remembering is from ruby, not JS? In which case what do you call this?



EDIT



I am aware that Object and Array can achieve the same result. At this point I just really want to know if there's a specific structure for it, and what its name is, because I thought I remembered seeing it somewhere, either in JS or ruby. Please tell me what it's called, or tell me it doesn't exist, so I can have an ease of mind again..



For JS, I don't think it is Map either, because the value -> key direction still needed a bit of work.






javascript







share|improve this question
















Lets say we have:





  • 0: "APPLE"


  • 1: "ORANGE"


  • 2: "GRAPES"

  • ...


Is there a structure in JavaScript that allows me to get "ORANGE" from 1 and 1 from "ORANGE"? I remembered there was such a thing (not Object or Array) but can't remember its name, and I couldn't figure out a way to Google it without already knowing what it's called :(



Unless what I'm remembering is from ruby, not JS? In which case what do you call this?



EDIT



I am aware that Object and Array can achieve the same result. At this point I just really want to know if there's a specific structure for it, and what its name is, because I thought I remembered seeing it somewhere, either in JS or ruby. Please tell me what it's called, or tell me it doesn't exist, so I can have an ease of mind again..



For JS, I don't think it is Map either, because the value -> key direction still needed a bit of work.






javascript




javascript






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 16 '18 at 10:58









Stefan

77.4k895148




77.4k895148










asked Nov 16 '18 at 10:09









Lucia LuLucia Lu

8,52752839




8,52752839








  • 2





    maybe you are looking for Map

    – Nina Scholz
    Nov 16 '18 at 10:10











  • You can easily do that with an object, though

    – CertainPerformance
    Nov 16 '18 at 10:14











  • @CertainPerformance Anyway getting key from value would require some loop, though

    – hindmost
    Nov 16 '18 at 10:17








  • 1





    Possible duplicate of How can I create a two-way mapping in JavaScript, or some other way to swap out values?

    – Jeto
    Nov 16 '18 at 10:17











  • @hindmost It's trivial though, and so would a Map, right?

    – CertainPerformance
    Nov 16 '18 at 10:18
















  • 2





    maybe you are looking for Map

    – Nina Scholz
    Nov 16 '18 at 10:10











  • You can easily do that with an object, though

    – CertainPerformance
    Nov 16 '18 at 10:14











  • @CertainPerformance Anyway getting key from value would require some loop, though

    – hindmost
    Nov 16 '18 at 10:17








  • 1





    Possible duplicate of How can I create a two-way mapping in JavaScript, or some other way to swap out values?

    – Jeto
    Nov 16 '18 at 10:17











  • @hindmost It's trivial though, and so would a Map, right?

    – CertainPerformance
    Nov 16 '18 at 10:18










2




2





maybe you are looking for Map

– Nina Scholz
Nov 16 '18 at 10:10





maybe you are looking for Map

– Nina Scholz
Nov 16 '18 at 10:10













You can easily do that with an object, though

– CertainPerformance
Nov 16 '18 at 10:14





You can easily do that with an object, though

– CertainPerformance
Nov 16 '18 at 10:14













@CertainPerformance Anyway getting key from value would require some loop, though

– hindmost
Nov 16 '18 at 10:17







@CertainPerformance Anyway getting key from value would require some loop, though

– hindmost
Nov 16 '18 at 10:17






1




1





Possible duplicate of How can I create a two-way mapping in JavaScript, or some other way to swap out values?

– Jeto
Nov 16 '18 at 10:17





Possible duplicate of How can I create a two-way mapping in JavaScript, or some other way to swap out values?

– Jeto
Nov 16 '18 at 10:17













@hindmost It's trivial though, and so would a Map, right?

– CertainPerformance
Nov 16 '18 at 10:18







@hindmost It's trivial though, and so would a Map, right?

– CertainPerformance
Nov 16 '18 at 10:18














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