Backend Development
Golang
How to Handle the \'invalid operation: d[\\\'data\\\'] (type interface {} does not support indexing)\' Error in Golang When Accessing Nested JSON Data?
How to Handle the \'invalid operation: d[\\\'data\\\'] (type interface {} does not support indexing)\' Error in Golang When Accessing Nested JSON Data?
Addressing the Error: "invalid operation: d["data"] (type interface {} does not support indexing)"
encountered while accessing nested JSON data in Golang.
When working with dynamic JSON responses, it is not uncommon to encounter the error, "invalid operation:
To resolve this, you need to first ensure that the variable d is type-asserted as a map[string]interface{}, as seen below:
<code class="go">test := d.(map[string]interface{})["data"].(map[string]interface{})["type"]</code>By making this assertion, you are specifically stating that d is of type map[string]interface{}, allowing you to access its keys. Subsequently, you can access the "data" and retrieve the "type" property from the nested map.
As an alternative approach, you can also declare d as a map[string]interface{} directly:
<code class="go">var d map[string]interface{}
json.NewDecoder(response.Body).Decode(&d)
test := d["data"].(map[string]interface{})["type"]</code>By doing so, you eliminate the need for the first type assertion.
To aid in these operations, consider using the github.com/icza/dyno library, which specializes in handling dynamic objects and provides convenient methods for navigating and manipulating JSON data.
The above is the detailed content of How to Handle the \'invalid operation: d[\\\'data\\\'] (type interface {} does not support indexing)\' Error in Golang When Accessing Nested JSON Data?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1670
14
1428
52
1329
25
1274
29
1256
24
Golang vs. Python: Performance and Scalability
Apr 19, 2025 am 12:18 AM
Golang is better than Python in terms of performance and scalability. 1) Golang's compilation-type characteristics and efficient concurrency model make it perform well in high concurrency scenarios. 2) Python, as an interpreted language, executes slowly, but can optimize performance through tools such as Cython.
Golang and C : Concurrency vs. Raw Speed
Apr 21, 2025 am 12:16 AM
Golang is better than C in concurrency, while C is better than Golang in raw speed. 1) Golang achieves efficient concurrency through goroutine and channel, which is suitable for handling a large number of concurrent tasks. 2)C Through compiler optimization and standard library, it provides high performance close to hardware, suitable for applications that require extreme optimization.
Getting Started with Go: A Beginner's Guide
Apr 26, 2025 am 12:21 AM
Goisidealforbeginnersandsuitableforcloudandnetworkservicesduetoitssimplicity,efficiency,andconcurrencyfeatures.1)InstallGofromtheofficialwebsiteandverifywith'goversion'.2)Createandrunyourfirstprogramwith'gorunhello.go'.3)Exploreconcurrencyusinggorout
Golang vs. C : Performance and Speed Comparison
Apr 21, 2025 am 12:13 AM
Golang is suitable for rapid development and concurrent scenarios, and C is suitable for scenarios where extreme performance and low-level control are required. 1) Golang improves performance through garbage collection and concurrency mechanisms, and is suitable for high-concurrency Web service development. 2) C achieves the ultimate performance through manual memory management and compiler optimization, and is suitable for embedded system development.
Golang's Impact: Speed, Efficiency, and Simplicity
Apr 14, 2025 am 12:11 AM
Goimpactsdevelopmentpositivelythroughspeed,efficiency,andsimplicity.1)Speed:Gocompilesquicklyandrunsefficiently,idealforlargeprojects.2)Efficiency:Itscomprehensivestandardlibraryreducesexternaldependencies,enhancingdevelopmentefficiency.3)Simplicity:
Golang vs. Python: Key Differences and Similarities
Apr 17, 2025 am 12:15 AM
Golang and Python each have their own advantages: Golang is suitable for high performance and concurrent programming, while Python is suitable for data science and web development. Golang is known for its concurrency model and efficient performance, while Python is known for its concise syntax and rich library ecosystem.
Golang and C : The Trade-offs in Performance
Apr 17, 2025 am 12:18 AM
The performance differences between Golang and C are mainly reflected in memory management, compilation optimization and runtime efficiency. 1) Golang's garbage collection mechanism is convenient but may affect performance, 2) C's manual memory management and compiler optimization are more efficient in recursive computing.
The Performance Race: Golang vs. C
Apr 16, 2025 am 12:07 AM
Golang and C each have their own advantages in performance competitions: 1) Golang is suitable for high concurrency and rapid development, and 2) C provides higher performance and fine-grained control. The selection should be based on project requirements and team technology stack.
