How to check if a map contains a key in Go

2021-11-02

85 words - 1 min read

If you have a map in Go and want to only perform an action if it contains a certain key, then you can do so easily:

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if val, ok := myMap["someValue"]; ok {
    // your code here
}

The way this works is the conditional if statement checks to see if a value of someValue exists in the myMap map variable.

If it exists, it assigns the key’s value to a val variable, and assigns the ok variable to a truthy boolean.