(self: Duration, that: Duration): booleanProvides an Equivalence instance for comparing Duration values.
Example (Comparing durations for equivalence)
import { Duration } from "effect"
const isEqual = Duration.Equivalence(Duration.seconds(5), Duration.millis(5000))
console.log(isEqual) // trueinstances
Source effect/Duration.ts:12136 lines
export const const Equivalence: Equ.Equivalence<Duration>Provides an Equivalence instance for comparing Duration values.
Example (Comparing durations for equivalence)
import { Duration } from "effect"
const isEqual = Duration.Equivalence(Duration.seconds(5), Duration.millis(5000))
console.log(isEqual) // true
Equivalence: import EquEqu.type Equivalence<in A> = (
self: A,
that: A
) => boolean
Represents an equivalence relation over type A.
When to use
Use as a type annotation when you accept or return an equivalence function.
Details
- Returns
boolean: true if values are equivalent, false otherwise
- Must satisfy reflexive, symmetric, and transitive properties
Example (Defining simple number equivalence)
import type { Equivalence } from "effect"
const numberEq: Equivalence.Equivalence<number> = (a, b) => a === b
console.log(numberEq(1, 1)) // true
console.log(numberEq(1, 2)) // false
Example (Defining custom object equivalence)
import type { Equivalence } from "effect"
interface Point {
x: number
y: number
}
const pointEq: Equivalence.Equivalence<Point> = (a, b) =>
a.x === b.x && a.y === b.y
console.log(pointEq({ x: 1, y: 2 }, { x: 1, y: 2 })) // true
Equivalence<Duration> = (self: Duration(parameter) self: {
value: DurationValue;
pipe: { <A>(this: A): A; <A, B = never>(this: A, ab: (_: A) => B): B; <A, B = never, C = never>(this: A, ab: (_: A) => B, bc: (_: B) => C): C; <A, B = never, C = never, D = never>(this: A, ab: (_: A) => B, bc: (_: B) => C, cd: (_: C) => D): D; <…;
toString: () => string;
toJSON: () => unknown;
}
that: Duration(parameter) that: {
value: DurationValue;
pipe: { <A>(this: A): A; <A, B = never>(this: A, ab: (_: A) => B): B; <A, B = never, C = never>(this: A, ab: (_: A) => B, bc: (_: B) => C): C; <A, B = never, C = never, D = never>(this: A, ab: (_: A) => B, bc: (_: B) => C, cd: (_: C) => D): D; <…;
toString: () => string;
toJSON: () => unknown;
}
const matchPair: {
<A, B, C>(
that: Duration,
options: {
readonly onMillis: (
self: number,
that: number
) => A
readonly onNanos: (
self: bigint,
that: bigint
) => B
readonly onInfinity: (
self: Duration,
that: Duration
) => C
}
): (self: Duration) => A | B | C
<A, B, C>(
self: Duration,
that: Duration,
options: {
readonly onMillis: (
self: number,
that: number
) => A
readonly onNanos: (
self: bigint,
that: bigint
) => B
readonly onInfinity: (
self: Duration,
that: Duration
) => C
}
): A | B | C
}
self: Duration(parameter) self: {
value: DurationValue;
pipe: { <A>(this: A): A; <A, B = never>(this: A, ab: (_: A) => B): B; <A, B = never, C = never>(this: A, ab: (_: A) => B, bc: (_: B) => C): C; <A, B = never, C = never, D = never>(this: A, ab: (_: A) => B, bc: (_: B) => C, cd: (_: C) => D): D; <…;
toString: () => string;
toJSON: () => unknown;
}
that: Duration(parameter) that: {
value: DurationValue;
pipe: { <A>(this: A): A; <A, B = never>(this: A, ab: (_: A) => B): B; <A, B = never, C = never>(this: A, ab: (_: A) => B, bc: (_: B) => C): C; <A, B = never, C = never, D = never>(this: A, ab: (_: A) => B, bc: (_: B) => C, cd: (_: C) => D): D; <…;
toString: () => string;
toJSON: () => unknown;
}
onMillis: (self: number, that: number) => booleanonMillis: (self: numberself, that: numberthat) => self: numberself === that: numberthat,
onNanos: (self: bigint, that: bigint) => booleanonNanos: (self: bigintself, that: bigintthat) => self: bigintself === that: bigintthat,
onInfinity: (
self: Duration,
that: Duration
) => boolean
self: Duration(parameter) self: {
value: DurationValue;
pipe: { <A>(this: A): A; <A, B = never>(this: A, ab: (_: A) => B): B; <A, B = never, C = never>(this: A, ab: (_: A) => B, bc: (_: B) => C): C; <A, B = never, C = never, D = never>(this: A, ab: (_: A) => B, bc: (_: B) => C, cd: (_: C) => D): D; <…;
toString: () => string;
toJSON: () => unknown;
}
that: Duration(parameter) that: {
value: DurationValue;
pipe: { <A>(this: A): A; <A, B = never>(this: A, ab: (_: A) => B): B; <A, B = never, C = never>(this: A, ab: (_: A) => B, bc: (_: B) => C): C; <A, B = never, C = never, D = never>(this: A, ab: (_: A) => B, bc: (_: B) => C, cd: (_: C) => D): D; <…;
toString: () => string;
toJSON: () => unknown;
}
self: Duration(parameter) self: {
value: DurationValue;
pipe: { <A>(this: A): A; <A, B = never>(this: A, ab: (_: A) => B): B; <A, B = never, C = never>(this: A, ab: (_: A) => B, bc: (_: B) => C): C; <A, B = never, C = never, D = never>(this: A, ab: (_: A) => B, bc: (_: B) => C, cd: (_: C) => D): D; <…;
toString: () => string;
toJSON: () => unknown;
}
Duration.value: DurationValuevalue._tag: | "Millis"
| "Nanos"
| "Infinity"
| "NegativeInfinity"
that: Duration(parameter) that: {
value: DurationValue;
pipe: { <A>(this: A): A; <A, B = never>(this: A, ab: (_: A) => B): B; <A, B = never, C = never>(this: A, ab: (_: A) => B, bc: (_: B) => C): C; <A, B = never, C = never, D = never>(this: A, ab: (_: A) => B, bc: (_: B) => C, cd: (_: C) => D): D; <…;
toString: () => string;
toJSON: () => unknown;
}
Duration.value: DurationValuevalue._tag: | "Millis"
| "Nanos"
| "Infinity"
| "NegativeInfinity"
Referenced by 2 symbols