Description
Question
I have a set of data in key-value pairs that is constant, never changing. I need to access the values by using a variable that holds the key (it's dynamic). It is specific to a subset of code, and I'd like to put it in a namespace that relates to it. I figured that creating a Map was the best way to handle this type of data so I can access the values based off of the key (I've had other issues trying to access values on objects via dynamic keys in AssemblyScript otherwise I would use that). I figured exporting it from the namespace would provide me with what I've needed. I've exported functions from the same namespace without any issues. I am open to other options so if there's an AssemblyScript way to handle this please let me know.
The issue that I am having is that all of the code that I have tried exports an empty map, or doesn't compile. The only way to get it to work is to create a function that returns it, and export that function. I'd like to avoid doing this.
Here is some example code:
namespace TestNamespaceOne {
export const map: Map<string, string> = new Map()
map.set('key1', 'value1');
}
namespace TestNamespaceTwo {
const testMap: Map<string, string> = new Map()
testMap.set('key1', 'value1');
export const map = testMap;
}
namespace TestNamespaceThree {
const testMap: Map<string, string> = new Map()
testMap.set('key1', 'value1');
export function getTestMap(): Map<string, string>{
return testMap;
}
}
namespace TestNamespaceFour {
export function getTestMap(): Map<string, string>{
const testMap: Map<string, string> = new Map()
testMap.set('key1', 'value1');
return testMap;
}
}
// namespace TestNamespaceOther {
// function getMap(): Map<string, string>{
// const testMap: Map<string, string> = new Map()
// testMap.set('key1', 'value1');
// return testMap;
// }
// export const map = getMap();
// }
class TestClass {
constructor(){
console.log('TestNamespaceOne: '+TestNamespaceOne.map.keys().join(","))
console.log('TestNamespaceTwo: '+TestNamespaceTwo.map.keys().join(","))
console.log('TestNamespaceThree: '+TestNamespaceThree.getTestMap().keys().join(","))
console.log('TestNamespaceFour: '+TestNamespaceFour.getTestMap().keys().join(","))
}
}
export function testFunction(): void{
const testClass = new TestClass();
}When in instantiate TestClass, the following shows up in the console:
TestNamespaceOne:
TestNamespaceTwo:
TestNamespaceThree:
TestNamespaceFour: key1
As you can see, the first three solutions all return an empty map.
I also have TestNamespaceOther in the code that doesn't even compile. When left uncommented, and I try to compile it, I get the following result:
ERROR TS2304: Cannot find name 'getMap'.
:
4900 │ export const map = getMap();
│ ~~~~~~
└─ in assembly/index.ts(4900,24)
FAILURE 1 compile error(s)
Somehow it cannot find the function declared immediately before it. I've tried other variations on this with no desired results as well.
The version of AssemblyScript that I am using is 0.25.2.
Any ideas how I can accomplish this? I am not sure if it's a bug or if this is an intended consequence of the way AssemblyScript works. As I've said, I'm open to other options, but being unable to use dynamic properties on objects I figured a map would be the way to go - but if there's a better way to model and access the data then I would gladly use that. just let me know.