Function weighted_rand_select

weighted_rand_select(
    options: any[],
    probability_property?: string,
    rng?: JssmRng,
): any
Selects a single item from a weighted array of objects using cumulative probability. Each object in the array should have a numeric property indicating its relative weight (defaults to 'probability'). Objects missing the property are treated as weight 1.
```
const opts = [
  { value: 'common',  probability: 0.8 },
  { value: 'rare',    probability: 0.2 }
];

weighted_rand_select(opts);  // most often { value: 'common', ... }
```
Parameters
- options: any[]
  Non-empty array of objects to choose from.
- probability_property: string = 'probability'
  Name of the numeric weight property on each object. Defaults to 'probability'.
- Optionalrng: JssmRng
  Optional random number generator () => number in [0, 1). Defaults to Math.random.
Returns any
One element from options, chosen by weighted random selection.

Throws
If options is not a non-empty array of objects.
- Defined in src/ts/jssm_util.ts:92