I'm trying to create a script that mimics multi-dimensional arrays for a personal project. I generate surnames, traits, and more, but I feel like I'm going about it the wrong way. Currently, I'm using `declare` commands and trying to create connected items, but it's becoming confusing. I'd really appreciate any tips or suggestions on how to structure this better!
3 Answers
For complex data storage, consider using associative arrays. You can combine multiple keys into a single string as the key for storing values. Here's a neat little example:
```bash
key() {
printf -- "%s-" "$@"
}
declare -A mda
mda[$(key 1)]=1
mda[$(key 1 a)]=1.a
mda[$(key 2 k iv)]=2.k.iv
```
This lets you mimic multi-dimensional behavior using a single associative array. It's a little different from traditional multi-dimensional arrays, but it works effectively in Bash!
When declaring arrays, make sure not to use the `$` symbol. For example, instead of `declare -a $name`, just use `declare -a name`. Using `$name` is attempting to reference the value, not declare the array you want. This simple change can save you quite a bit of trouble!
Oh, I see! That makes a lot more sense.
This is good to know; I often mess that up!
It sounds like you're trying to handle a lot of complexity with arrays. Instead of using `eval`, which can lead to some unpredictable results, think about storing your data in files if possible. For instance, create a directory and use files named after each name to store their characteristics. Linux handles files really well, so it might simplify your script! Plus, here’s a helpful resource on why you should avoid `eval`: [link](https://stackoverflow.com/questions/17529220/why-should-eval-be-avoided-in-bash-and-what-should-i-use-instead).
Good idea! Using files could definitely keep things organized.
Thanks for the example! I think I can adapt that to my needs.