openbilibili/vendor/github.com/stretchr/objx/doc.go

// objx - Go package for dealing with maps, slices, JSON and other data.
//
// Overview
//
// Objx provides the `objx.Map` type, which is a `map[string]interface{}` that exposes
// a powerful `Get` method (among others) that allows you to easily and quickly get
// access to data within the map, without having to worry too much about type assertions,
// missing data, default values etc.
//
// Pattern
//
// Objx uses a preditable pattern to make access data from within `map[string]interface{}'s
// easy.
//
// Call one of the `objx.` functions to create your `objx.Map` to get going:
//
//     m, err := objx.FromJSON(json)
//
// NOTE: Any methods or functions with the `Must` prefix will panic if something goes wrong,
// the rest will be optimistic and try to figure things out without panicking.
//
// Use `Get` to access the value you're interested in.  You can use dot and array
// notation too:
//
//     m.Get("places[0].latlng")
//
// Once you have saught the `Value` you're interested in, you can use the `Is*` methods
// to determine its type.
//
//     if m.Get("code").IsStr() { /* ... */ }
//
// Or you can just assume the type, and use one of the strong type methods to
// extract the real value:
//
//     m.Get("code").Int()
//
// If there's no value there (or if it's the wrong type) then a default value
// will be returned, or you can be explicit about the default value.
//
//     Get("code").Int(-1)
//
// If you're dealing with a slice of data as a value, Objx provides many useful
// methods for iterating, manipulating and selecting that data.  You can find out more
// by exploring the index below.
//
// Reading data
//
// A simple example of how to use Objx:
//
//     // use MustFromJSON to make an objx.Map from some JSON
//     m := objx.MustFromJSON(`{"name": "Mat", "age": 30}`)
//
//     // get the details
//     name := m.Get("name").Str()
//     age := m.Get("age").Int()
//
//     // get their nickname (or use their name if they
//     // don't have one)
//     nickname := m.Get("nickname").Str(name)
//
// Ranging
//
// Since `objx.Map` is a `map[string]interface{}` you can treat it as such.  For
// example, to `range` the data, do what you would expect:
//
//     m := objx.MustFromJSON(json)
//     for key, value := range m {
//
//       /* ... do your magic ... */
//
//     }
package objx