---
name: pipe
menu: String Utils
---

import { Playground } from 'docz';
import { pipe } from '../../src';

# pipe

```
pipe({
  value: 'John Doe',
  toPipe: [onCapital, onRemoveSpaces, onAppendSymbol('!'), onPreAppendSymbol('==> ')],
})
```

## How does this help?

Suppose you have a string called 'John Doe' & you want to perform a series of
string operations on them as below.

- Turn all words capital.
- Remove white spaces.
- Append character(s) at the end of the string.
- Prepend characters(s) at the start of the string.

You probably would make the appropriate functions & wrap them around your string
like below.

```
onPreAppendSymbol('==> ')(onAppendSymbol('@')(onRemoveSpaces(onCapital('John Doe'))));
```

The above example is not very elegant, I honestly forget the count of all the
closing brackets, Solution for this would be using `pipe()` that takes in all
the `functions` as an array & makes it use like below

```
pipe({
  value: 'John Doe',
  toPipe: [onCapital, onRemoveSpaces, onAppendSymbol('!'), onPreAppendSymbol('==> ')],
});
```

I find the later solution a bit neat & elegant. Easy on the eyes. Here is an
example below.

## Examples

<Playground>
  {() => {
    const styles = {
      wrapper: {
        backgroundColor: 'white',
        color: 'black',
        padding: 15,
      },
      heading: {
        fontSize: 18,
        textDecoration: 'underline',
      },
      easy: {
        color: 'green',
      },
      hard: {
        color: 'red',
      },
    };

    const onCapital = (string = '') => string.toUpperCase();

    const onRemoveSpaces = (string = '') => string.replace(' ', '');

    const onAppendSymbol = (symbol = '') => (string = '') => {
      return `${string}${symbol}`;
    };

    const onPreAppendSymbol = (symbol = '') => (string = '') => {
      return `${symbol}${string}`;
    };

    return (
      <div style={styles.wrapper}>
        <h3 style={{ ...styles.heading, ...styles.hard }}>Difficult</h3>
        <p>{onPreAppendSymbol('==> ')(onAppendSymbol('!')(onRemoveSpaces(onCapital('John Doe'))))}</p>
        <h3 style={{ ...styles.heading, ...styles.easy }}>Easy</h3>
        <p>
          {pipe({
            value: 'John Doe',
            toPipe: [
              onCapital,
              onRemoveSpaces,
              onAppendSymbol('!'),
              onAppendSymbol('@'),
              onAppendSymbol('$'),
              onAppendSymbol('@$'),
              onPreAppendSymbol('==> ')
            ],
          })}
        </p>
      </div>
    );

}}

</Playground>

## API

- withCompose(...functions) Array of functions