assertcheck / assert / arity
Function: arity()
ts
function arity(
fn,
n,
opts?): void;Defined in: src/assert.ts:1830
Asserts that fn.length equals n (declared parameter count).
Parameters
| Parameter | Type |
|---|---|
fn | (...args) => unknown |
n | number |
opts? | Opts |
Returns
void
Example
ts
`assert.arity(transform, 1, "pipeline steps must be unary")`