Merge pull request #1074 from 30-seconds/remove-adapter

Remove adapter
This commit is contained in:
Angelos Chalaris
2020-01-13 10:12:31 +02:00
committed by GitHub
12 changed files with 88 additions and 88 deletions

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@ -1,6 +1,6 @@
---
title: ary
tags: adapter,function,intermediate
tags: function,intermediate
---
Creates a function that accepts up to `n` arguments, ignoring any additional arguments.

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@ -1,22 +1,22 @@
---
title: call
tags: adapter,function,intermediate
---
---
title: call
tags: function,intermediate
---
Given a key and a set of arguments, call them when given a context. Primarily useful in composition.
Use a closure to call a stored key with stored arguments.
```js
const call = (key, ...args) => context => context[key](...args);
```
```js
Promise.resolve([1, 2, 3])
.then(call('map', x => 2 * x))
.then(console.log); // [ 2, 4, 6 ]
const map = call.bind(null, 'map');
Promise.resolve([1, 2, 3])
.then(map(x => 2 * x))
.then(console.log); // [ 2, 4, 6 ]
```
Use a closure to call a stored key with stored arguments.
```js
const call = (key, ...args) => context => context[key](...args);
```
```js
Promise.resolve([1, 2, 3])
.then(call('map', x => 2 * x))
.then(console.log); // [ 2, 4, 6 ]
const map = call.bind(null, 'map');
Promise.resolve([1, 2, 3])
.then(map(x => 2 * x))
.then(console.log); // [ 2, 4, 6 ]
```

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@ -1,20 +1,20 @@
---
title: collectInto
tags: adapter,function,array,intermediate
---
---
title: collectInto
tags: function,array,intermediate
---
Changes a function that accepts an array into a variadic function.
Given a function, return a closure that collects all inputs into an array-accepting function.
```js
const collectInto = fn => (...args) => fn(args);
```
```js
const Pall = collectInto(Promise.all.bind(Promise));
let p1 = Promise.resolve(1);
let p2 = Promise.resolve(2);
let p3 = new Promise(resolve => setTimeout(resolve, 2000, 3));
Pall(p1, p2, p3).then(console.log); // [1, 2, 3] (after about 2 seconds)
```
Given a function, return a closure that collects all inputs into an array-accepting function.
```js
const collectInto = fn => (...args) => fn(args);
```
```js
const Pall = collectInto(Promise.all.bind(Promise));
let p1 = Promise.resolve(1);
let p2 = Promise.resolve(2);
let p3 = new Promise(resolve => setTimeout(resolve, 2000, 3));
Pall(p1, p2, p3).then(console.log); // [1, 2, 3] (after about 2 seconds)
```

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@ -1,22 +1,22 @@
---
title: flip
tags: adapter,function,intermediate
---
---
title: flip
tags: function,intermediate
---
Flip takes a function as an argument, then makes the first argument the last.
Return a closure that takes variadic inputs, and splices the last argument to make it the first argument before applying the rest.
```js
const flip = fn => (first, ...rest) => fn(...rest, first);
```
```js
let a = { name: 'John Smith' };
let b = {};
const mergeFrom = flip(Object.assign);
let mergePerson = mergeFrom.bind(null, a);
mergePerson(b); // == b
b = {};
Object.assign(b, a); // == b
```
Return a closure that takes variadic inputs, and splices the last argument to make it the first argument before applying the rest.
```js
const flip = fn => (first, ...rest) => fn(...rest, first);
```
```js
let a = { name: 'John Smith' };
let b = {};
const mergeFrom = flip(Object.assign);
let mergePerson = mergeFrom.bind(null, a);
mergePerson(b); // == b
b = {};
Object.assign(b, a); // == b
```

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@ -1,6 +1,6 @@
---
title: over
tags: adapter,function,intermediate
tags: function,intermediate
---
Creates a function that invokes each provided function with the arguments it receives and returns the results.
@ -14,4 +14,4 @@ const over = (...fns) => (...args) => fns.map(fn => fn.apply(null, args));
```js
const minMax = over(Math.min, Math.max);
minMax(1, 2, 3, 4, 5); // [1,5]
```
```

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@ -1,6 +1,6 @@
---
title: overArgs
tags: adapter,function,intermediate
tags: function,intermediate
---
Creates a function that invokes the provided function with its arguments transformed.
@ -16,4 +16,4 @@ const square = n => n * n;
const double = n => n * 2;
const fn = overArgs((x, y) => [x, y], [square, double]);
fn(9, 3); // [81, 6]
```
```

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@ -1,6 +1,6 @@
---
title: pipeAsyncFunctions
tags: adapter,function,promise,intermediate
tags: function,promise,intermediate
---
Performs left-to-right function composition for asynchronous functions.
@ -23,4 +23,4 @@ const sum = pipeAsyncFunctions(
(async () => {
console.log(await sum(5)); // 15 (after one second)
})();
```
```

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@ -1,6 +1,6 @@
---
title: pipeFunctions
tags: adapter,function,intermediate
tags: function,intermediate
---
Performs left-to-right function composition.
@ -17,4 +17,4 @@ const add5 = x => x + 5;
const multiply = (x, y) => x * y;
const multiplyAndAdd5 = pipeFunctions(multiply, add5);
multiplyAndAdd5(5, 2); // 15
```
```

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@ -1,6 +1,6 @@
---
title: promisify
tags: adapter,function,promise,intermediate
tags: function,promise,intermediate
---
Converts an asynchronous function to return a promise.
@ -20,4 +20,4 @@ const promisify = func => (...args) =>
```js
const delay = promisify((d, cb) => setTimeout(cb, d));
delay(2000).then(() => console.log('Hi!')); // // Promise resolves after 2s
```
```

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@ -1,6 +1,6 @@
---
title: rearg
tags: adapter,function,intermediate
tags: function,intermediate
---
Creates a function that invokes the provided function with its arguments arranged according to the specified indexes.
@ -19,4 +19,4 @@ var rearged = rearg(
[2, 0, 1]
);
rearged('b', 'c', 'a'); // ['a', 'b', 'c']
```
```

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@ -1,17 +1,17 @@
---
title: spreadOver
tags: adapter,intermediate
---
---
title: spreadOver
tags: function,intermediate
---
Takes a variadic function and returns a closure that accepts an array of arguments to map to the inputs of the function.
Use closures and the spread operator (`...`) to map the array of arguments to the inputs of the function.
```js
const spreadOver = fn => argsArr => fn(...argsArr);
```
```js
const arrayMax = spreadOver(Math.max);
arrayMax([1, 2, 3]); // 3
```
Use closures and the spread operator (`...`) to map the array of arguments to the inputs of the function.
```js
const spreadOver = fn => argsArr => fn(...argsArr);
```
```js
const arrayMax = spreadOver(Math.max);
arrayMax([1, 2, 3]); // 3
```

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@ -1,6 +1,6 @@
---
title: unary
tags: adapter,function,intermediate
tags: function,beginner
---
Creates a function that accepts up to one argument, ignoring any additional arguments.
@ -13,4 +13,4 @@ const unary = fn => val => fn(val);
```js
['6', '8', '10'].map(unary(parseInt)); // [6, 8, 10]
```
```