tryCall

Wraps a synchronous function call in a try-catch and returns an [error, result] tuple instead of throwing. For async functions, use tryAsyncCall.

Usage

import { tryCall } from 'rattail'

const [err, result] = tryCall(() => JSON.parse('{"a":1}'))
// [undefined, { a: 1 }]

const [err2, result2] = tryCall(() => JSON.parse('invalid'))
// [SyntaxError, undefined]

// Pass arguments directly
const [err3, result3] = tryCall(JSON.parse, '{"a":1}')
// [undefined, { a: 1 }]

const [err4, result4] = tryCall((a: number, b: number) => a + b, 1, 2)
// [undefined, 3]

Arguments

Arg	Type	Description
fn	(...args: Args) => T	A sync function to call
...args	Args	Arguments to pass to fn

Return

Type
[unknown, undefined] | [undefined, T]