If you’re reading this post you’re probably searching on Google how to solve this problem: you’re passing a pointer to a slice or map in a function, and when referencing an item with *variable[0], you get that error.
How do I solve it?
The solution is simple: instead of using
*variable[0]
use
(*variable)[0]
Why am I getting this weird error? 🤔
*variable[0] is interpreted by the Go compiler as *(variable[0]). So what you’re telling the compiler to do is, get the first element in the slice, or the map item with key 0, and dereference that pointer.
This explains the error: variable in that context is a pointer, not a value, so you cannot get the [0] item of a pointer to an address, you need to dereference it first to get the value, which is what I think you are trying to do in the first place.
One more thing! ⚠️ ✋
At the end of January I will organize the Web
Development
Bootcamp.
It's a 10-weeks long cohort online course where I will guide you to becoming a Web Developer.
It's not "just a course". It's a big event I organize once a year.
We'll start from zero, learn the fundamentals of Web Development, HTML CSS, JavaScript, Tailwind, Git, using the command line, VS Code, GitHub, Node.js, we'll then learn React, JSX, how to use PostgreSQL, Astro, Next.js, Prisma, deploying on Netlify/DigitalOcean/Fly/Vercel and much more!
At the end of the first 10 weeks you'll know how to create web sites and web applications and I'll unlock you the 2nd phase of the Bootcamp: you will get access to a large number of projects exclusive to the Bootcamp graduates, so you can follow my instructions to build things like private areas with authentication, clones of popular sites like Twitter YouTube Reddit, create e-commerce sites, and much much more.
Because once you got the fundamentals, you only learn by working on real, exciting projects.
To find out more, visit bootcamp.dev
It's a 10-weeks long cohort online course where I will guide you to becoming a Web Developer.
It's not "just a course". It's a big event I organize once a year.
We'll start from zero, learn the fundamentals of Web Development, HTML CSS, JavaScript, Tailwind, Git, using the command line, VS Code, GitHub, Node.js, we'll then learn React, JSX, how to use PostgreSQL, Astro, Next.js, Prisma, deploying on Netlify/DigitalOcean/Fly/Vercel and much more!
At the end of the first 10 weeks you'll know how to create web sites and web applications and I'll unlock you the 2nd phase of the Bootcamp: you will get access to a large number of projects exclusive to the Bootcamp graduates, so you can follow my instructions to build things like private areas with authentication, clones of popular sites like Twitter YouTube Reddit, create e-commerce sites, and much much more.
Because once you got the fundamentals, you only learn by working on real, exciting projects.
To find out more, visit bootcamp.dev