How to get the value of a specific key in Julia
Overview
The get() method in Julia retrieves the value mapped for a specified key. If there is no mapping for the key, it returns a default value.
Syntax
get(collection, key, default)
Arguments
This method takes three arguments.
collection: This is the collection in which the value is to be retrieved. In this case, the collection isDictionary.key: This is the key whose value is to be retrieved from the Dictionary.
default: This is the default value to be returned if there is no mapping for the provided key.
Return value
This method returns the value associated with the given key. If no value is associated, it returns the default value.
Code
The code below demonstrates how to use the get() method.
# Creating a Dictionary
SampleDict = Dict("one"=>1, "two"=>2, "three"=>3);
## Getting the element for the key "one"
println(get(SampleDict, "one", 1))
## Getting the element for the key "five"
println(get(SampleDict, "five", 5))Explanation
Line 2: We create a new Dictionary named SamplDict. SamplDict has three entries: one, two, and three.
Line 5: We use the get() method to retrieve the value associated with the key one. The value 1 is returned as the result.
Line 8: We use the get() method to retrieve the value associated with the key five. Since there is no entry with key five, the default value 5 is returned as the result.
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