Merging Dictionary collections in Julia – merge() and merge!() Methods
The merge() is an inbuilt function in julia which is used to construct a merged collection from the specified collections.
Syntax:
merge(d::AbstractDict, others::AbstractDict…)
or
merge(combine, d::AbstractDict, others::AbstractDict…)
or
merge(a::NamedTuple, bs::NamedTuple…)Parameters:
- d::AbstractDict: First specified collection.
- others::AbstractDict: Second specified collection.
- combine: Specified combing operation.
- NamedTuple: Specified different tuples..
Returns: It returns the merged collection.
Example 1:
# Julia program to illustrate # the use of merge() method # Getting the the merged collection. a = Dict("a" => 1, "b" => 2) b = Dict("c" => 3, "b" => 4) prinln(merge(a, b)) |
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Output:
Example 2:
# Julia program to illustrate # the use of merge() method # Getting the the merged collection # along with specified operation # over the key's value a = Dict("a" => 1, "b" => 2) b = Dict("c" => 3, "b" => 4) prinln(merge(+, a, b)) |
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Output:
Example 3:
# Julia program to illustrate # the use of merge() method # Getting the the merged tuple println(merge((a = 5, b = 10), (b = 15, d = 20))) println(merge((a = 5, b = 10), (b = 15, c =(d = 20, )), (c =(d = 25, ), ))) # Merging tuple of key-value pairs with # iteration operation println(merge((a = 5, b = 10, c = 15), [:b =>20, :d =>25])) |
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Output:
merge!()
The merge!() is an inbuilt function in julia which is used to update collection with pairs from the other collections.
Syntax:
merge!(d::AbstractDict, others::AbstractDict…)
or
merge!(combine, d::AbstractDict, others::AbstractDict…)Parameters:
- d::AbstractDict: First specified collection.
- others::AbstractDict: Second specified collection.
- combine: Specified combing operation.
Returns: It returns the updated collection with pairs from the other collections.
Example 1:
# Julia program to illustrate # the use of merge !() method # Getting the updated collection with # pairs from the other collections. A = Dict("a" => 1, "b" => 2); B = Dict("b" => 4, "c" => 5); println(merge !(A, B)) |
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Output:
Dict("c"=>5, "b"=>4, "a"=>1)
Example 2:
# Julia program to illustrate # the use of merge !() method # Getting the updated collection with # pairs from the other collections # with + operation A = Dict("a" => 1, "b" => 2); B = Dict("b" => 4, "c" => 5); println(merge !(+, A, B)) |
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Output:
Dict("c"=>5, "b"=>6, "a"=>1)
