(u: unknown): u is DurationChecks whether a value is a Duration.
Example (Checking for durations)
import { Duration } from "effect"
console.log(Duration.isDuration(Duration.seconds(1))) // true
console.log(Duration.isDuration(1000)) // falseguards
Source effect/Duration.ts:4131 lines
export const const isDuration: (
u: unknown
) => u is Duration
Checks whether a value is a Duration.
Example (Checking for durations)
import { Duration } from "effect"
console.log(Duration.isDuration(Duration.seconds(1))) // true
console.log(Duration.isDuration(1000)) // false
isDuration = (u: unknownu: unknown): u: unknownu is Duration => hasProperty<"~effect/time/Duration">(self: unknown, property: "~effect/time/Duration"): self is { [K in "~effect/time/Duration"]: unknown; } (+1 overload)Checks whether a value has a given property key.
When to use
Use when you need a Predicate guard for property access on unknown
values with a simple structural object check.
Details
Uses the in operator and isObjectKeyword. This does not check property
value types.
Example (Guarding object properties)
import { Predicate } from "effect"
const hasName = Predicate.hasProperty("name")
const data: unknown = { name: "Ada" }
if (hasName(data)) {
console.log(data.name)
}
hasProperty(u: unknownu, const TypeId: "~effect/time/Duration"TypeId)Referenced by 1 symbols