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How can we create and use OrderedDicts and OrderedSet in Julia?
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OrderedDict
OrderedDict is similar to a dictionary. However, unlike a dictionary, it maintains the insertion order of its entries. All the operations that can be performed in the dictionary can also be performed in the OrderedDict.
Example
Here is a sample code for using the OrderedDict in Julia:
using DataStructures
# Create a new OrderedDict object
dict = OrderedDict{Char,Int}()
dict['a'] = 1;
dict['b'] = 2;
dict['c'] = 3;
dict['d'] = 4;
println(dict);
Using the OrderedDict
Explanation
- Line 4: We create a new
OrderedDictobject with the namedict. - Lines 6–9: We add four key-value pairs to the
dictobject. - Line 11: We print the
dict. Notice how the entries of thedictare printed in their order of insertion.
OrderedSet
The OrderedSet is similar to a set. However, unlike a set, it maintains the insertion order of its elements. All the operations that can be performed in a set can also be performed in the OrderedSet.
Example
Here is a sample code for using the OrderedSet in Julia:
using DataStructures
# Create a new OrderedSet object
set = OrderedSet{Int}()
push!(set,1)
push!(set,2)
push!(set,10)
push!(set,3)
println(set);
Using the OrderedSet
Explanation
- Line 4: We create a new
OrderedSetobject with the nameset. - Lines 6–9: We add four elements to the
setobject using thepush!method. - Line 11: We print the
set. Notice how the elements of thesetare printed in their order of insertion.
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