Too Few Values in Struct Literal

Why This Happens

When initializing a struct without field names, you must provide values for every field in the correct order. If you leave one out, the compiler rejects it. Using named fields lets you omit fields that should have their zero value.

The Problem

type Point struct {
    X, Y, Z int
}

p := Point{1, 2} // too few values in struct literal

The Fix

p := Point{X: 1, Y: 2} // Z defaults to 0

Step-by-Step Fix

1. 1

   Identify the struct

   Find the struct literal and count the fields versus provided values.

2. 2

   Switch to named fields

   Use field:value syntax to specify only the fields you want to set.

3. 3

   Set default values

   Omitted fields will get their zero value automatically.