Class: None

Implements

IOption<any>

Constructors

constructor

• new None()

Methods

[iterator]

▸ [iterator](): Generator<never, any, unknown>

Returns an iterator over the possibly contained value.

The iterator yields one value if the result is Some, otherwise none.

Example

const x = some(7);
for (const value of x) {
  console.log(value);
}
// Logs 7

Example

const x = none;
for (const value of x) {
  console.log(value);
}
// Doesn't log

See

Returns

Generator<never, any, unknown>

Implementation of

IOption.[iterator]

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1807

and

▸ and(option): None

Returns None if the option is None, otherwise returns option.

Example

const x: Option<number> = some(2);
const y: Option<string> = none;
assert.equal(x.and(y), none);

Example

const x: Option<number> = none;
const y: Option<string> = some('foo');
assert.equal(x.and(y), none);

Example

const x: Option<number> = some(2);
const y: Option<string> = some('foo');
assert.equal(x.and(y), some('foo'));

Example

const x: Option<number> = none;
const y: Option<string> = none;
assert.equal(x.and(y), none);

See

https://doc.rust-lang.org/std/option/enum.Option.html#method.and

Parameters

Name	Type	Description
`option`	`Option`<`any`>	The option.

Returns

None

Implementation of

IOption.and

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1782

andThen

▸ andThen(cb): None

Calls cb if the result is Ok, otherwise returns the Err value of self.

This function can be used for control flow based on Result values.

Example

function fractionOf4(value: number) {
  return value === 0 ? none : some(4 / value);
}

assert.equal(some(2).andThen(fractionOf4), some(4));
assert.equal(some(0).andThen(fractionOf4), none);
assert.equal(none.andThen(fractionOf4), none);

See

https://doc.rust-lang.org/std/result/enum.Result.html#method.and_then

Parameters

Name	Type	Description
`cb`	(`value`: `never`) => `Option`<`any`>	The predicate.

Returns

None

Implementation of

IOption.andThen

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1783

contains

▸ contains(value?): false

Returns true if the option is a Some value containing the given value.

Example

const x: Option<number> = some(2);
assert.equal(x.contains(2), true);

Example

const x: Option<number> = some(3);
assert.equal(x.contains(2), false);

Example

const x: Option<number> = none;
assert.equal(x.contains(2), false);

See

https://doc.rust-lang.org/std/option/enum.Option.html#method.contains

Parameters

Name	Type	Description
`value?`	`any`	The value to compare.

Returns

false

Implementation of

IOption.contains

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1790

eq

▸ eq(other): true

Checks whether or not other equals with self.

See

https://doc.rust-lang.org/std/cmp/trait.PartialEq.html#tymethod.eq

Parameters

Name	Type	Description
`other`	`None`	The other option to compare.

Returns

true

Implementation of

IOption.eq

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1797

▸ eq(other): false

Parameters

Name	Type
`other`	`Some`<`any`>

Returns

false

Implementation of

IOption.eq

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1798

▸ eq(other): boolean

Parameters

Name	Type
`other`	`Option`<`any`>

Returns

boolean

Implementation of

IOption.eq

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1799

expect

▸ expect(message): never

Returns the contained Some value.

Example

const x: Option<string> = some(2);
assert.equal(x.expect('Whoops!'), 2);

Example

const x: Option<string> = none;
assert.throws(() => x.expect('Whoops!'), {
  name: 'OptionError',
  message: 'Whoops'
});

See

https://doc.rust-lang.org/std/option/enum.Option.html#method.expect

Parameters

Name	Type	Description
`message`	`string`	The message for the error. If the value is an `Err`, it throws an OptionError with the given message.

Returns

never

Implementation of

IOption.expect

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1768

filter

▸ filter(predicate): None

Returns None if the option is None, otherwise calls predicate with the wrapped value and returns:

Some(t) if predicate returns true (where t is the wrapped value), and
None if predicate returns false.

Example

function isEven(value: number) {
  return n % 2 === 0;
}

assert.equal(none.filter(isEven), none);
assert.equal(some(3).filter(isEven), none);
assert.equal(some(4).filter(isEven), some(4));

See

https://doc.rust-lang.org/std/option/enum.Option.html#method.filter

Parameters

Name	Type	Description
`predicate`	(`value`: `never`) => `boolean`	The predicate.

Returns

None

Implementation of

IOption.filter

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1789

flatten

▸ flatten(): None

Converts from Result<Result<T, E>, E> to Result<T, E>.

Example

const x: Option<Option<number>> = some(some(6));
assert.equal(x.flatten(), some(6));

Example

const x: Option<Option<number>> = some(none);
assert.equal(x.flatten(), none);

Example

const x: Option<Option<number>> = none;
assert.equal(x.flatten(), none);

See

https://doc.rust-lang.org/std/result/enum.Result.html#method.flatten

Returns

None

Implementation of

IOption.flatten

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1795

inspect

▸ inspect(cb?): None

Calls the provided closure with a reference to the contained value (if Some).

Seealso

inspectAsync for the awaitable version.

Example

some(2).inspect(console.log);
// Logs: 2

Example

none.inspect(console.log);
// Doesn't log

See

https://doc.rust-lang.org/std/option/enum.Option.html#method.inspect

Parameters

Name	Type	Description
`cb?`	(`value`: `never`) => `void`	The predicate.

Returns

None

Implementation of

IOption.inspect

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1777

inspectAsync

▸ inspectAsync(cb?): Promise<None>

Calls the provided closure with a reference to the contained value (if Some).

Seealso

inspect for the sync version.

Example

await some(2).inspectAsync(console.log);
// Logs: 2

Example

await none.inspectAsync(console.log);
// Doesn't log

Note

This is an extension not supported in Rust

Parameters

Name	Type	Description
`cb?`	(`value`: `never`) => `unknown`	The predicate.

Returns

Promise<None>

Implementation of

IOption.inspectAsync

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1778

intoPromise

▸ intoPromise(): Promise<None>

Returns a Promise object with the awaited value (if Some).

Example

let x = some(Promise.resolve(3));
assert.equal(await x.intoPromise(), some(3));

Note

This is an extension not supported in Rust

Returns

Promise<None>

Implementation of

IOption.intoPromise

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1796

isNone

▸ isNone(): this is None

Returns true if the option is a None value.

Example

const x: Option<number> = some(2);
assert.equal(x.isNone(), false);

Example

const x: Option<number> = none;
assert.equal(x.isNone(), true);

See

https://doc.rust-lang.org/std/option/enum.Option.html#method.is_none

Returns

this is None

Implementation of

IOption.isNone

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1767

isSome

▸ isSome(): false

Returns true if the option is a Some value.

Example

const x: Option<number> = some(2);
assert.equal(x.isSome(), true);

Example

const x: Option<number> = none;
assert.equal(x.isSome(), false);

See

https://doc.rust-lang.org/std/option/enum.Option.html#method.is_some

Returns

false

Implementation of

IOption.isSome

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1765

isSomeAnd

▸ isSomeAnd(cb?): false

Returns true if the option is a Some and the value inside of it matches a predicate.

Example

const x: Option<number> = some(2);
assert.equal(x.isSomeAnd((x) => x > 1), true);

Example

const x: Option<number> = some(0);
assert.equal(x.isSomeAnd((x) => x > 1), false);

Example

const x: Option<number> = none;
assert.equal(x.isSomeAnd((x) => x > 1), false);

See

https://doc.rust-lang.org/std/option/enum.Option.html#method.is_some_and

Parameters

Name	Type	Description
`cb?`	(`value`: `never`) => `boolean`	The predicate.

Returns

false

Implementation of

IOption.isSomeAnd

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1766

iter

▸ iter(): Generator<never, any, unknown>

Returns an iterator over the possibly contained value.

The iterator yields one value if the result is Some, otherwise none.

Example

const x = some(7);
for (const value of x) {
  console.log(value);
}
// Logs 7

Example

const x = none;
for (const value of x) {
  console.log(value);
}
// Doesn't log

See

Option.iter
https://doc.rust-lang.org/std/option/enum.Option.html#method.iter

Returns

Generator<never, any, unknown>

Implementation of

IOption.iter

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1781

map

▸ map(cb): None

Maps an Option<T> to Option<U> by applying a function to a contained value.

Example

const maybeSomeString = some('Hello, world!');
const maybeSomeLength = maybeSomeString.map((value) => value.length);

assert.equal(maybeSomeLength, some(13));

See

https://doc.rust-lang.org/std/option/enum.Option.html#method.map

Parameters

Name	Type	Description
`cb`	(`value`: `never`) => `any`	The predicate.

Returns

None

Implementation of

IOption.map

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1772

mapInto

▸ mapInto(cb): None

Maps a Some<T> to the returned Option<U> by applying a function to a contained value, leaving None untouched.

Example

const input: Option<string> = some('Hello, world!');
const result = input.mapInto((value) => some(value.length));

assert.equal(result, some(13));

Example

const input: Option<string> = none;
const result = input.mapInto((value) => some(value.length));

assert.equal(result, none);

Note

This is an extension not supported in Rust

Parameters

Name	Type	Description
`cb`	(`value`: `never`) => `Option`<`any`>	The predicate.

Returns

None

Implementation of

IOption.mapInto

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1773

mapNoneInto

▸ mapNoneInto<R>(cb): R

Maps a None to the returned Option<U> by applying a function to a contained value, leaving Some<T> untouched.

Example

const input: Option<string> = some('Hello, world!');
const result = input.mapNoneInto(() => some(13));

assert.equal(result, some('Hello, world!'));

Example

const input: Option<string> = none;
const result = input.mapNoneInto(() => some(13));

assert.equal(result, some(13));

Note

This is an extension not supported in Rust

Type parameters

Name	Type
`R`	extends `Option`<`any`>

Parameters

Name	Type	Description
`cb`	() => `R`	The predicate.

Returns

R

Implementation of

IOption.mapNoneInto

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1776

mapOr

▸ mapOr<R>(defaultValue, cb?): R

Returns the provided default result (if none), or applies a function to the contained value (if any).

Arguments passed to mapOr are eagerly evaluated; if you are passing the result of a function call, it is recommended to use mapOrElse, which is lazily evaluated.

Example

const x: Option<string> = some('hello');
assert.equal(x.mapOr(42, (value) => value.length), 5);

Example

const x: Option<string> = none;
assert.equal(x.mapOr(42, (value) => value.length), 42);

See

https://doc.rust-lang.org/std/option/enum.Option.html#method.map_or

Type parameters

Name
`R`

Parameters

Name	Type	Description
`defaultValue`	`R`	The default value.
`cb?`	(`value`: `never`) => `R`	The predicate.

Returns

R

Implementation of

IOption.mapOr

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1774

mapOrElse

▸ mapOrElse<R>(defaultValue, cb?): R

Computes a default function result (if none), or applies a different function to the contained value (if any).

Example

const x: Option<string> = some('hello');
assert.equal(x.mapOrElse(() => 42, (value) => value.length), 5);

Example

const x: Option<string> = none;
assert.equal(x.mapOrElse(() => 42, (value) => value.length), 42);

See

https://doc.rust-lang.org/std/option/enum.Option.html#method.map_or_else

Type parameters

Name
`R`

Parameters

Name	Type	Description
`defaultValue`	() => `R`	The default value.
`cb?`	(`value`: `never`) => `R`	The predicate.

Returns

R

Implementation of

IOption.mapOrElse

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1775

match

▸ match<SomeValue, NoneValue>(branches): NoneValue

Runs ok function if self is Ok, otherwise runs err function.

Example

const option = some(4).match({
  some: (v) => v,
  none: () => 0
});
assert.equal(option, 4);

Example

const option = none.match({
  some: (v) => v,
  none: () => 0
});
assert.equal(option, 0);

Type parameters

Name
`SomeValue`
`NoneValue`

Parameters

Name	Type	Description
`branches`	`Object`	The branches to match.
`branches.none`	() => `NoneValue`	-
`branches.some`	(`value`: `never`) => `SomeValue`	-

Returns

NoneValue

Implementation of

IOption.match

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1803

ne

▸ ne(other): false

Checks whether or not other doesn't equal with self.

See

https://doc.rust-lang.org/std/cmp/trait.PartialEq.html#method.ne

Parameters

Name	Type	Description
`other`	`None`	The other option to compare.

Returns

false

Implementation of

IOption.ne

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1800

▸ ne(other): true

Parameters

Name	Type
`other`	`Some`<`any`>

Returns

true

Implementation of

IOption.ne

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1801

▸ ne(other): boolean

Parameters

Name	Type
`other`	`Option`<`any`>

Returns

boolean

Implementation of

IOption.ne

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1802

okOr

▸ okOr<E>(error): Err<E>

Transforms the Option<T> into a Result<T, E>, mapping Some(v) to Ok(v) and None to Err(err).

Arguments passed to okOr are eagerly evaluated; if you are passing the result of a function call, it is recommended to use okOrElse, which is lazily evaluated.

Example

const x: Option<string> = some('hello');
assert.equal(x.okOr(0), ok('hello'));

Example

const x: Option<string> = none;
assert.equal(x.okOr(0), err(0));

See

https://doc.rust-lang.org/std/option/enum.Option.html#method.ok_or

Type parameters

Name
`E`

Parameters

Name	Type	Description
`error`	`E`	The error to be used.

Returns

Err<E>

Implementation of

IOption.okOr

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1779

okOrElse

▸ okOrElse<E>(cb): Err<E>

Transforms the Option<T> into a Result<T, E>, mapping Some(v) to Ok(v) and None to Err(err()).

Example

const x: Option<string> = some('hello');
assert.equal(x.okOrElse(() => 0), ok('hello'));

Example

const x: Option<string> = none;
assert.equal(x.okOrElse(() => 0), err(0));

See

https://doc.rust-lang.org/std/option/enum.Option.html#method.ok_or_else

Type parameters

Name
`E`

Parameters

Name	Type	Description
`cb`	() => `E`	The error to be used.

Returns

Err<E>

Implementation of

IOption.okOrElse

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1780

or

▸ or<R>(option): R

Returns the option if it contains a value, otherwise returns option.

Example

const x: Option<number> = some(2);
const y: Option<number> = none;
assert.equal(x.or(y), some(2));

Example

const x: Option<number> = none;
const y: Option<number> = some(100);
assert.equal(x.or(y), some(100));

Example

const x: Option<number> = some(2);
const y: Option<number> = some(100);
assert.equal(x.or(y), some(2));

Example

const x: Option<number> = none;
const y: Option<number> = none;
assert.equal(x.or(y), none);

See

https://doc.rust-lang.org/std/option/enum.Option.html#method.or

Type parameters

Name	Type
`R`	extends `Option`<`any`>

Parameters

Name	Type	Description
`option`	`R`	The option.

Returns

R

Implementation of

IOption.or

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1784

orElse

▸ orElse<R>(cb): R

Calls cb if the result is Ok, otherwise returns the Err value of self.

This function can be used for control flow based on Result values.

Example

const nobody = (): Option<string> => none;
const vikings = (): Option<string> => some('vikings');

assert.equal(some('barbarians').orElse(vikings), some('barbarians'));
assert.equal(none.orElse(vikings), some('vikings'));
assert.equal(none.orElse(nobody), none);

See

https://doc.rust-lang.org/std/option/enum.Option.html#method.or_else

Type parameters

Name	Type
`R`	extends `Option`<`any`>

Parameters

Name	Type	Description
`cb`	() => `R`	The predicate.

Returns

R

Implementation of

IOption.orElse

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1785

transpose

▸ transpose(): Ok<None>

Transposes an Option of a Result into a Result of an Option.

none will be mapped to ok(none). some(ok(v)) and some(err(e)) will be mapped to ok(some(v)) and err(e).

Example

const x: Option<Result<number, Error>> = some(ok(5));
const y: Result<Option<number>, Error> = ok(some(5));
assert.equal(x.transpose(), y);

See

https://doc.rust-lang.org/std/option/enum.Option.html#method.transpose

Returns

Ok<None>

Implementation of

IOption.transpose

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1794

unwrap

▸ unwrap(): never

Returns the contained Some value.

If the value is an Err, it throws an OptionError with the message.

Seealso

unwrapOr

Seealso

unwrapOrElse

Example

const x: Option<string> = some(2);
assert.equal(x.unwrap(), 2);

Example

const x: Option<string> = none;
assert.throws(() => x.unwrap(), {
  name: 'OptionError',
  message: 'Unwrap failed'
});

See

https://doc.rust-lang.org/std/option/enum.Option.html#method.unwrap

Returns

never

Implementation of

IOption.unwrap

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1769

unwrapOr

▸ unwrapOr<R>(defaultValue): R

Returns the contained Some value or a provided default.

Arguments passed to unwrapOr are eagerly evaluated; if you are passing the result of a function call, it is recommended to use unwrapOrElse, which is lazily evaluated.

Example

assert.equal(some(2).unwrapOr(0), 2);

Example

assert.equal(none.unwrapOr(0), 0);

See

https://doc.rust-lang.org/std/option/enum.Option.html#method.unwrap_or

Type parameters

Name
`R`

Parameters

Name	Type
`defaultValue`	`R`

Returns

R

Implementation of

IOption.unwrapOr

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1770

unwrapOrElse

▸ unwrapOrElse<R>(cb): R

Returns the contained Some value or computes it from a closure.

Example

assert.equal(some(2).unwrapOrElse(() => 0), 2);

Example

assert.equal(none.unwrapOrElse(() => 0), 0);

See

https://doc.rust-lang.org/std/option/enum.Option.html#method.unwrap_or_else

Type parameters

Name
`R`

Parameters

Name	Type
`cb`	() => `R`

Returns

R

Implementation of

IOption.unwrapOrElse

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1771

unzip

▸ unzip(): [None, None]

Unzips an option containing a tuple of two options.

If self is Some((a, b)) this method returns [Some(a), Some(b)]. Otherwise, [None, None] is returned.

Example

const x: Option<[number, string]> = some([1, 'hi']);
assert.equal(x.unzip(), [some(1), some('hi')]);

Example

const x: Option<[number, string]> = none;
assert.equal(x.unzip(), [none, none]);

See

https://doc.rust-lang.org/std/option/enum.Option.html#method.unzip

Returns

[None, None]

Implementation of

IOption.unzip

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1793

xor

▸ xor<T>(option): None

Returns Some if exactly one of self or option is Some, otherwise returns None.

Example

const x: Option<number> = some(2);
const y: Option<number> = none;
assert.equal(x.xor(y), some(2));

Example

const x: Option<number> = none;
const y: Option<number> = some(2);
assert.equal(x.xor(y), some(2));

Example

const x: Option<number> = some(2);
const y: Option<number> = some(2);
assert.equal(x.xor(y), none);

Example

const x: Option<number> = none;
const y: Option<number> = none;
assert.equal(x.xor(y), none);

See

https://doc.rust-lang.org/std/option/enum.Option.html#method.xor

Type parameters

Name
`T`

Parameters

Name	Type	Description
`option`	`None`	The option to compare.

Returns

None

Implementation of

IOption.xor

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1786

▸ xor<T>(option): Some<T>

Type parameters

Name
`T`

Parameters

Name	Type
`option`	`Some`<`T`>

Returns

Some<T>

Implementation of

IOption.xor

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1787

▸ xor<T>(option): None | Some<T>

Type parameters

Name
`T`

Parameters

Name	Type
`option`	`Option`<`T`>

Returns

None | Some<T>

Implementation of

IOption.xor

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1788

zip

▸ zip(other): None

Zips self with another Option.

If self is Some(s) and other is Some(o), this method returns Some([s, o]). Otherwise, None is returned.

Example

const x = some(1);
const y = some('hi');
const z = none;

assert.equal(x.zip(y), some([1, 'hi']));
assert.equal(x.zip(z), none);

See

https://doc.rust-lang.org/std/option/enum.Option.html#method.zip

Parameters

Name	Type	Description
`other`	`Option`<`any`>	The option to zip self with.

Returns

None

Implementation of

IOption.zip

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1791

zipWith

▸ zipWith(other, f): None

Zips self and another Option with function f.

If self is Some(s) and other is Some(o), this method returns Some(f(s, o)). Otherwise, None is returned.

Example

class Point {
  public readonly x: number;
  public readonly y: number;

  public constructor(x: number, y: number) {
    this.x = x;
    this.y = y;
  }
}

const x = some(17.5);
const y = some(42.7);

assert.equal(x.zipWith(y, (s, o) => new Point(s, o)), some(new Point(17.5, 42.7)));
assert.equal(x.zipWith(none, (s, o) => new Point(s, o)), none);

See

https://doc.rust-lang.org/std/option/enum.Option.html#method.zip_with

Parameters

Name	Type	Description
`other`	`Option`<`any`>	The option to zip self with.
`f`	(`s`: `never`, `o`: `never`) => `any`	The function that computes the returned value.

Returns

None

Implementation of

IOption.zipWith

Defined in

node_modules/@sapphire/result/dist/index.d.ts:1792

Implements​

Constructors​

constructor​

Methods​

[iterator]​

Returns​

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and​

Parameters​

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andThen​

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contains​

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eq​

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expect​

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filter​

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flatten​

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inspect​

Parameters​

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Implementation of​

Defined in​

inspectAsync​

Parameters​

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Implementation of​

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intoPromise​

Returns​

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isNone​

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isSome​

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isSomeAnd​

Parameters​

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iter​

Returns​

Implementation of​

Implements

Constructors

constructor

Methods

[iterator]

Returns

Implementation of

Defined in

and

Parameters

Returns

Implementation of

Defined in

andThen

Parameters

Returns

Implementation of

Defined in

contains

Parameters

Returns

Implementation of

Defined in

eq

Parameters

Returns

Implementation of

Defined in

Parameters

Returns

Implementation of

Defined in

Parameters

Returns

Implementation of

Defined in

expect

Parameters

Returns

Implementation of

Defined in

filter

Parameters

Returns

Implementation of

Defined in

flatten

Returns

Implementation of

Defined in

inspect

Parameters

Returns

Implementation of

Defined in

inspectAsync

Parameters

Returns

Implementation of

Defined in

intoPromise

Returns

Implementation of

Defined in

isNone

Returns

Implementation of

Defined in

isSome

Returns

Implementation of

Defined in

isSomeAnd

Parameters

Returns

Implementation of

Defined in

iter

Returns

Implementation of