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How to get the value of a specific key in Julia

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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 is Dictionary.
  • 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))
An example of using the get() method

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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julia
dictionary
communitycreator
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