github.com/mdaxf/iac@v0.0.0-20240519030858-58a061660378/vendor_skip/github.com/stretchr/objx/README.md (about)

     1  # Objx
     2  [![Build Status](https://travis-ci.org/stretchr/objx.svg?branch=master)](https://travis-ci.org/stretchr/objx)
     3  [![Go Report Card](https://goreportcard.com/badge/github.com/stretchr/objx)](https://goreportcard.com/report/github.com/stretchr/objx)
     4  [![Maintainability](https://api.codeclimate.com/v1/badges/1d64bc6c8474c2074f2b/maintainability)](https://codeclimate.com/github/stretchr/objx/maintainability)
     5  [![Test Coverage](https://api.codeclimate.com/v1/badges/1d64bc6c8474c2074f2b/test_coverage)](https://codeclimate.com/github/stretchr/objx/test_coverage)
     6  [![Sourcegraph](https://sourcegraph.com/github.com/stretchr/objx/-/badge.svg)](https://sourcegraph.com/github.com/stretchr/objx)
     7  [![GoDoc](https://godoc.org/github.com/stretchr/objx?status.svg)](https://godoc.org/github.com/stretchr/objx)
     8  
     9  Objx - Go package for dealing with maps, slices, JSON and other data.
    10  
    11  Get started:
    12  
    13  - Install Objx with [one line of code](#installation), or [update it with another](#staying-up-to-date)
    14  - Check out the API Documentation http://godoc.org/github.com/stretchr/objx
    15  
    16  ## Overview
    17  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.
    18  
    19  ### Pattern
    20  Objx uses a preditable pattern to make access data from within `map[string]interface{}` easy. Call one of the `objx.` functions to create your `objx.Map` to get going:
    21  
    22      m, err := objx.FromJSON(json)
    23  
    24  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.
    25  
    26  Use `Get` to access the value you're interested in.  You can use dot and array
    27  notation too:
    28  
    29       m.Get("places[0].latlng")
    30  
    31  Once you have sought the `Value` you're interested in, you can use the `Is*` methods to determine its type.
    32  
    33       if m.Get("code").IsStr() { // Your code... }
    34  
    35  Or you can just assume the type, and use one of the strong type methods to extract the real value:
    36  
    37      m.Get("code").Int()
    38  
    39  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.
    40  
    41       Get("code").Int(-1)
    42  
    43  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.
    44  
    45  ### Reading data
    46  A simple example of how to use Objx:
    47  
    48      // Use MustFromJSON to make an objx.Map from some JSON
    49      m := objx.MustFromJSON(`{"name": "Mat", "age": 30}`)
    50  
    51      // Get the details
    52      name := m.Get("name").Str()
    53      age := m.Get("age").Int()
    54  
    55      // Get their nickname (or use their name if they don't have one)
    56      nickname := m.Get("nickname").Str(name)
    57  
    58  ### Ranging
    59  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:
    60  
    61      m := objx.MustFromJSON(json)
    62      for key, value := range m {
    63        // Your code...
    64      }
    65  
    66  ## Installation
    67  To install Objx, use go get:
    68  
    69      go get github.com/stretchr/objx
    70  
    71  ### Staying up to date
    72  To update Objx to the latest version, run:
    73  
    74      go get -u github.com/stretchr/objx
    75  
    76  ### Supported go versions
    77  We support the lastest three major Go versions, which are 1.10, 1.11 and 1.12 at the moment.
    78  
    79  ## Contributing
    80  Please feel free to submit issues, fork the repository and send pull requests!