Function doIf

doIf<T>(cond: boolean, fn: () => T): undefined | T
Executes a function if the condition is true. If the condition is false, returns undefined. This is a concise way to run code conditionally without using a full if statement.
Type Parameters
- T
Parameters
- cond: boolean
  The condition to check.
- fn: () => T
  The function to execute if the condition is true.
Returns undefined | T
The result of the function if the condition is true, otherwise undefined.
Example
```
// Will execute the function and return the result because the condition is true
const result = doIf(true, () => "Hello, world!");
console.log(result); // "Hello, world!"
```
Example
```
// Will not execute the function and return undefined because the condition is false
const result = doIf(false, () => "This will not run");
console.log(result); // undefined
```
- Defined in src/control/utils.ts:146