How Can I Skip Values When Using Iota to Define Constants in Go?

How to Skip Numerous Values When Defining Const Variables with Iota?

Iota, a constantly increasing integer, simplifies constant enumeration in Go. However, skipping substantial values during enumeration can be challenging.

Manual Offset with Single Group

For a single group of constants, assign an explicit offset to iota, leaving subsequent initialization expressions blank:

const (
    APPLE = iota
    ORANGE
    PEAR
    BANANA = iota + 96 // Manually calculate the offset to obtain 99
    GRAPE
)

Breaking the Constant Group

To avoid affecting subsequent constants if you insert elements before BANANA, break the group:

const (
    APPLE = iota
    ORANGE
    PEAR
)
const (
    BANANA = iota + 99 // Iota resets to 0 for the new group
    GRAPE
)

Single Group with Automatic Offset

For a single group, introduce a constant where you want to "break" the numbering and subtract its value from iota in the subsequent line:

const (
    APPLE = iota
    ORANGE
    PEAR

    _BREAK

    BANANA = iota - _BREAK + 98 // Continue from 99 + 1 = 99
    GRAPE
)

Taste Preferences

"_BREAK" can be initialized with iota 1 for a simple offset calculation:

const (
    APPLE = iota
    ORANGE
    PEAR

    _BREAK = iota + 1

    BANANA = iota - _BREAK + 99 // Continue from 99
    GRAPE
)

Choose the method that aligns best with your preferences and development style.

The above is the detailed content of How Can I Skip Values When Using Iota to Define Constants in Go?. For more information, please follow other related articles on the PHP Chinese website!