重要

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var s string = "9223372036854775807"
i, err := strconv.ParseInt(s, 10, 64)
if err != nil {
    panic(err)
}
fmt.Printf("Hello, %v with type %s!\n", i, reflect.TypeOf(i))
// Hello, 9223372036854775807 with type int64!

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import (
    "gopkg.in/gormigrate.v1"
    "github.com/jinzhu/gorm"
    _ "github.com/jinzhu/gorm/dialects/sqlite"
)

m := gormigrate.New(db, gormigrate.DefaultOptions, []*gormigrate.Migration{
    {
        ID: "201608301400",
        Migrate: func(tx *gorm.DB) error {
            return tx.AutoMigrate(&Person{}).Error
        },
        Rollback: func(tx *gorm.DB) error {
            return tx.DropTable("people").Error
        },
    },
})
err = m.Migrate()

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func Find(slice []string, val string) (int, bool) {
    for i, item := range slice {
        if item == val {
            return i, true
        }
    }
    return -1, false
}

items := []string{"A", "1", "B", "2", "C", "3"}
k, found := Find(items, "B")
// found=true, k=2