How to Append Values to Arrays Within Objects in a Go Map?

Appending Values to Arrays Within a Map in Go

In Go, you can create maps that hold objects of custom types. To append values to arrays within these objects, you need to first create an instance of the object and then assign it to the map.

Incorrect Approach

In your code, you're attempting to directly access the AppendExample method of the Example struct within the map initialization. However, you cannot use the dot operator on a map value without first referencing the underlying object.

<code class="go">MyMap["key1"] = Oferty.AppendExample(1, "SomeText")</code>

Correct Approach

To correctly append values to arrays within a map, you should:

1. Create an instance of the Example object and populate its arrays.
2. Assign the reference to this object to the map using the asterisk * operator.

<code class="go">obj := &Example{[]int{}, []string{}}
obj.AppendExample(1, "SomeText")
MyMap = make(map[string]*Example)
MyMap["key1"] = obj</code>

This approach ensures that the map keeps a reference to the actual object, allowing you to modify its arrays later.

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