Function map

map<T, E, const U extends Primitive>(
result: Promise<Result<T, E>>,
fn: (data: T) => U | Promise,
): Promise<Result<U, E>>
Map result data.

If the result is an Ok, the function will be called with the data the result contains.

The result of the function will then be returned as a new Ok result.

On an Err, the function will not be called, and the original Err will be returned.
Type Parameters
- T
- E
- const U extends Primitive
Parameters
- result: Promise<Result<T, E>>
- fn: (data: T) => U | Promise
Returns Promise<Result<U, E>>
Example
```
const result: Result<1, "error"> = ok(1);
const value = map(result, (data) => {
 console.log(data);
	return (data + 1) as 2;
});
// `1` gets logged by the callback;
typeof value; // Result<2, "error">
```
Example
```
const result: Result<1, "error"> = err("error");
const value = map(result, (data) => {
 console.log(data);
	return (data + 1) as 2;
});
// Nothing gets logged by the callback;
typeof value; // Result<2, "error">
```
- Defined in result/impl.ts:436
map<T, E, const U extends Primitive>(
result: Result<T, E>,
fn: (data: T) => Promise,
): Promise<Result<U, E>>
Map result data.

If the result is an Ok, the function will be called with the data the result contains.

The result of the function will then be returned as a new Ok result.

On an Err, the function will not be called, and the original Err will be returned.
Type Parameters
- T
- E
- const U extends Primitive
Parameters
- result: Result<T, E>
- fn: (data: T) => Promise
Returns Promise<Result<U, E>>
Example
```
const result: Result<1, "error"> = ok(1);
const value = map(result, (data) => {
 console.log(data);
	return (data + 1) as 2;
});
// `1` gets logged by the callback;
typeof value; // Result<2, "error">
```
Example
```
const result: Result<1, "error"> = err("error");
const value = map(result, (data) => {
 console.log(data);
	return (data + 1) as 2;
});
// Nothing gets logged by the callback;
typeof value; // Result<2, "error">
```
- Defined in result/impl.ts:440
map<T, E, const U extends Primitive>(
result: Result<T, E>,
fn: (data: T) => U,
): Result<U, E>
Map result data.

If the result is an Ok, the function will be called with the data the result contains.

The result of the function will then be returned as a new Ok result.

On an Err, the function will not be called, and the original Err will be returned.
Type Parameters
- T
- E
- const U extends Primitive
Parameters
- result: Result<T, E>
- fn: (data: T) => U
Returns Result<U, E>
Example
```
const result: Result<1, "error"> = ok(1);
const value = map(result, (data) => {
 console.log(data);
	return (data + 1) as 2;
});
// `1` gets logged by the callback;
typeof value; // Result<2, "error">
```
Example
```
const result: Result<1, "error"> = err("error");
const value = map(result, (data) => {
 console.log(data);
	return (data + 1) as 2;
});
// Nothing gets logged by the callback;
typeof value; // Result<2, "error">
```
- Defined in result/impl.ts:444
map<T, E, U>(
result: Promise<Result<T, E>>,
fn: (data: T) => U | Promise,
): Promise<Result<U, E>>
Map result data.

If the result is an Ok, the function will be called with the data the result contains.

The result of the function will then be returned as a new Ok result.

On an Err, the function will not be called, and the original Err will be returned.
Type Parameters
- T
- E
- U
Parameters
- result: Promise<Result<T, E>>
- fn: (data: T) => U | Promise
Returns Promise<Result<U, E>>
Example
```
const result: Result<1, "error"> = ok(1);
const value = map(result, (data) => {
 console.log(data);
	return (data + 1) as 2;
});
// `1` gets logged by the callback;
typeof value; // Result<2, "error">
```
Example
```
const result: Result<1, "error"> = err("error");
const value = map(result, (data) => {
 console.log(data);
	return (data + 1) as 2;
});
// Nothing gets logged by the callback;
typeof value; // Result<2, "error">
```
- Defined in result/impl.ts:448
map<T, E, U>(
result: Result<T, E>,
fn: (data: T) => Promise,
): Promise<Result<U, E>>
Map result data.

If the result is an Ok, the function will be called with the data the result contains.

The result of the function will then be returned as a new Ok result.

On an Err, the function will not be called, and the original Err will be returned.
Type Parameters
- T
- E
- U
Parameters
- result: Result<T, E>
- fn: (data: T) => Promise
Returns Promise<Result<U, E>>
Example
```
const result: Result<1, "error"> = ok(1);
const value = map(result, (data) => {
 console.log(data);
	return (data + 1) as 2;
});
// `1` gets logged by the callback;
typeof value; // Result<2, "error">
```
Example
```
const result: Result<1, "error"> = err("error");
const value = map(result, (data) => {
 console.log(data);
	return (data + 1) as 2;
});
// Nothing gets logged by the callback;
typeof value; // Result<2, "error">
```
- Defined in result/impl.ts:452

map<T, E, U>(result: Result<T, E>, fn: (data: T) => U): Result<U, E>

Map result data.

If the result is an Ok, the function will be called with the data the result contains.

The result of the function will then be returned as a new Ok result.

On an Err, the function will not be called, and the original Err will be returned.

Type Parameters

Parameters

result: Result<T, E>
fn: (data: T) => U

Returns Result<U, E>

Example

const result: Result<1, "error"> = ok(1);
const value = map(result, (data) => {
 console.log(data);
	return (data + 1) as 2;
});
// `1` gets logged by the callback;
typeof value; // Result<2, "error">

Example

const result: Result<1, "error"> = err("error");
const value = map(result, (data) => {
 console.log(data);
	return (data + 1) as 2;
});
// Nothing gets logged by the callback;
typeof value; // Result<2, "error">

Function map

Type Parameters

Parameters

Returns Promise<Result<U, E>>

Example

Example

Type Parameters

Parameters

Returns Promise<Result<U, E>>

Example

Example

Type Parameters

Parameters

Returns Result<U, E>

Example

Example

Type Parameters

Parameters

Returns Promise<Result<U, E>>

Example

Example

Type Parameters

Parameters

Returns Promise<Result<U, E>>

Example

Example

Type Parameters

Parameters

Returns Result<U, E>

Example

Example

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