rustHow can I use a hashmap as a global variable in Rust?
A global variable in Rust can be implemented using a static variable. A static variable is a variable that is stored in the program's read-only memory and is accessible from any part of the program.
A static variable can be used to store a HashMap as a global variable. The following example code creates a static variable GLOBAL_MAP that stores a HashMap with a String key and i32 value:
static GLOBAL_MAP: HashMap<String, i32> = HashMap::new();Code explanation
static: A keyword used to declare a static variable.GLOBAL_MAP: The name of the static variable.HashMap<String, i32>: The type of the static variable, aHashMapwith aStringkey andi32value.HashMap::new(): A function that creates a new emptyHashMap.
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