Converting Matlab to Octave is there a containers.Map equivalent?

Question

I am trying to convert some matlab code from the Maia package into something that will work with Octave. I am currently getting stuck because one of the files has several ca

Answer 1

There is no exact equivalent of containers.Map in Octave that I know of...

One option is to use the java package to create java.util.Hashtable. Using this example:

pkg load java
d = javaObject("java.util.Hashtable");
d.put('a',1)
d.put('b',2)
d.put('c',3)
d.get('b')

---

If you are willing to do a bit of rewriting, you can use the builtin struct as a rudimentary hash table with strings (valid variable names) as keys, and pretty much anything stored in values.

For example, given the following:

keys = {'Mon','Tue','Wed'}
values = {10, 20, 30}

you could replace this:

map = containers.Map(keys,values);
map('Mon')

by:

s = struct();
for i=1:numel(keys)
    s.(keys{i}) = values{i};
end
s.('Mon')

You might need to use genvarname to produce valid keys, or maybe a proper hashing function that produces valid key strings.

Also look into struct-related functions: getfield, setfield, isfield, fieldnames, rmfield, etc..