Methods of Hash Class

Hash in JavaScript

In general, the hash data structure is pretty straightforward. Ruby has some methods of the Hash class that we will probably see in other languages as well. Here is, for example, what hash access looks like in JavaScript:

$ node
> hh = {};
{}
> hh['something'] = 'blabla';
'blabla'
> hh
{ something: 'blabla' }

The difference is that JavaScript doesn’t have a symbol type, and most of the time strings are used as hash keys. We can see a comparison between Ruby and JavaScript ...