Programming-Idioms

Edit summary for version 18 by programming-idioms.org:
[Go] Better demo with raw string literal

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2016-02-18, 16:58:02

2016-04-28, 11:42:28

Idiom #91 Load JSON file into struct

Read from file data.json and write its content into object x.
Assume the JSON data is suitable for the type of x.

Read from file data.json and write its content into object x.
Assume the JSON data is suitable for the type of x.

import "encoding/json"
import "io/ioutil"

import "encoding/json"
import "io/ioutil"

buffer, err := ioutil.ReadFile("data.json")
if err != nil {
	return err
}
err = json.Unmarshal(buffer, &x)
if err != nil {
	return err
}

buffer, err := ioutil.ReadFile("data.json")
if err != nil {
	return err
}
err = json.Unmarshal(buffer, &x)
if err != nil {
	return err
}

buffer is a []byte.
&x is the address of x.
You must check errors after each step.

buffer is a []byte.
&x is the address of x.
You must check errors after each step.

http://golang.org/pkg/encoding/json/#Unmarshal

http://golang.org/pkg/encoding/json/#Unmarshal

http://play.golang.org/p/FPA64xk7m-

https://play.golang.org/p/lGZ4vuDKH6

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