Home

Index

How to use the pipe function from ramda

Find comprehensive JavaScript ramda.pipe code examples handpicked from public code repositorys.

ramda.pipe is a function that allows you to combine multiple functions into a single function that can be executed in sequence.

apolloServer.js

350
351
352
353
354
355
356
357
358
359
return {
  willSendResponse: data => {
    const { response } = data;
    newrelic.addCustomAttribute(
      'errorCount',
      R.pipe(
        R.propOr([], 'errors'),
        R.length
      )(response)
    );

142

475

+ 4 other calls in file

removeChannelForwards.js

GitHub: thedevs-network/the-guard-bot

24
25
26
27
28
29
30
31
32
33
34
const toUsername = R.compose(
	capturingGroups,
	R.match(/^(?:@|(?:https?:\/\/)?(?:t\.me|telegram\.(?:me|dog))\/)(\w+)/i),
);


const customWhitelist = R.pipe(
	R.chain(toUsername),
	R.map(R.toLower),
	R.constructN(1, Set),
)(excludeLinks);

162

430

How does ramda.pipe work?

ramda.pipe is a function that takes one or more functions as arguments and returns a new function that, when called with an input, applies each function to the input in a left-to-right order, passing the result of each function call to the next function in the pipeline until the final result is returned.

publish.js

GitHub: tommmyy/ramda-extension

10
11
12
13
14
15
16
17
18
19
20
21
const marked = require('marked');


const version = require('./package.json').devDependencies.ramda;
const versionExtension = require('../ramda-extension/package.json').version;


const prettifyCode = R.pipe(
	R.join('\n'),
	(x) =>
		prettier.format(x, {
			parser: 'babel',

163

+ 2 other calls in file

ramda.js

GitHub: ayush-rudani/npmBox

156
157
158
159
160
161
162
163
164
165
166
167
 *  @param {* , function} fn nth function from left side of argument list restricted to take only one argument.
 *
 *  @return returns final result be it a value or a curried function.
 */


const f = R.pipe(Math.pow, R.negate, R.inc);
f(3, 4); //=> -(3^4) + 1


/* excution : Math.pow -> R.negate -> R.inc .
 *

+ 5 other calls in file

Ai Example

1
2
3
4
5
6
7
8
9
10
11
const R = require("ramda");

const numbers = [1, 2, 3, 4, 5, 6];

const result = R.pipe(
  R.filter((n) => n % 2 === 0), // Filter out odd numbers
  R.map((n) => n * 2), // Double even numbers
  R.sum // Sum up the result
)(numbers);

console.log(result); // Output: 20

In this example, ramda.pipe is used to create a function that takes the original array of numbers and applies the filtering, mapping, and summing operations in sequence. The result of calling the function with the numbers array is 20.

build_all_html.js

GitHub: csound-flossmanual/csound-floss

120
121
122
123
124
125
126
127
128
129
130
131
    }
  )(allChapters);


  const otherDir = path.resolve(__dirname, "../other");
  const interactiveDemo = path.join(otherDir, "interactive-demo.md");
  R.pipe(execMarkdownToHtml)(interactiveDemo);
};


module.exports = { buildAllHtml };

+ 705 other calls in file

misc.js

GitHub: GluuFederation/gluu-passport

20
21
22
23
24
25
26
27
28
29
30
31
32
 * |(function(*, *, *, *): *)|(function(*, *, *, *, *): *)|*}
 *
 */
const pipePromise = R.pipe(R.unapply(R.flatten), R.flip(pipePromise_))


const curry2AndFlip = R.pipe(R.curryN(2), R.flip)


const hash = obj => sha1(JSON.stringify(obj))


function pathsHaveData (list, obj) {

+ 5 other calls in file

.cz-config.js

GitHub: codelab-app/platform

23
24
25
26
27
28
29
30
31
32
  }, [])

  return [...paths, ...nestedPaths]
}

const scopes = R.pipe(
  R.reduce(allPathCombinations, []),
  R.sort((a, b) => a.localeCompare(b)),
  R.uniq,
  R.addIndex(R.map)((name, index) => {

IVWEB_WEEKL-20170310-CLIENT.md?plain=1

GitHub: iv-web/ivweb-weekly

428
429
430
431
432
433

<blockquote><pre><code class="language-javascript">
var negative = x => -1 * x;
var increaseOne = x => x + 1;

var f = R.pipe(Math.pow, negative, increaseOne);

slides.js

GitHub: madoos/adt-workshop

7
8
9
10
11
12
13
14
15
16
17
const VERTICAL_SEPARATOR = `${EOL}${revealOpt.verticalSeparator}${EOL}`;
const SEPARATOR = `${EOL}${revealOpt.separator}${EOL}`;
const SLIDES_PATH = join(__dirname, './slides.md');


const isMdFile = name => name.includes('.md');
const folders = pipe(
    unary(readdirSync),
    reject(isMdFile)
);

converters.js

GitHub: GrottoCenter/grottocenter-api

290
291
292
293
294
295
296
297
298
299
    : source.parent;

if (source.identifierType instanceof Object) {
  result.identifierType = {
    ...source.identifierType,
    id: ramda.pipe(
      ramda.pathOr(undefined, ['identifierType', 'id']),
      (id) => (id ? id.trim() : id)
    )(source),
  };

+ 43 other calls in file

index.js

GitHub: GlobalStrategies/jsgrowup

164
165
166
167
168
169
170
171
172

const getWhoFilePath = tableName => `${__dirname}/tables/${tableName}_zscores.json`;
const loadWhoFiles = R.pipe(getWhoFilePath, R.pipeP(fs.readFile, JSON.parse));

const allowedIndexKeys = ['Length', 'Height', 'Month', 'Week'];
const operativeIndexKey = R.pipe(R.keysIn, R.intersection(allowedIndexKeys), R.head);
const reIndex = R.indexBy(R.chain(R.prop, operativeIndexKey));
// find first allowed index key within object keys — this is the operative index key
// index by the values of the operative index key

+ 5 other calls in file

runner.js

GitHub: onebeyond/handy-postgres

19
20
21
22
23
24
25
26
27
28

const nameToContent = (acc, name) => R.assoc(shortName(name), R.trim(readFile(name)), acc);

const loadSql = (location) => {
  const files = fs.readdirSync(location);
  const load = R.pipe(
    R.filter(sqlFile),
    R.map(join(location)),
    R.reduce(nameToContent, {})
  );

+ 15 other calls in file

index.js

GitHub: side-projects-42/2emulate

66
67
68
69
70
71
72
73
74
75
76
77
  }
  return value && value.value ? value.value : value; // TODO move to sql adapter
};




const transformData = (aliasToMemberNameMap, annotation, data) => (data.map(r => R.pipe(
  R.toPairs,
  R.map(p => {
    const memberName = aliasToMemberNameMap[p[0]];
    const annotationForMember = annotation[memberName];

+ 7 other calls in file

utils.js

GitHub: SSWConsulting/SSW.CodeAuditor

54
55
56
57
58
59
60
61
62
63
const f = R.pipe(
  // group by Language Type
  R.groupBy(R.prop("linter")),
  R.converge(
    R.zipWith((k, v) => ({
      [k]: R.pipe(
        // then group by the file
        R.groupBy(R.prop("file")),
        R.converge(
          R.zipWith((k, v) => ({

+ 15 other calls in file

get_tunes.js

GitHub: bbecquet/irish-tune-map

8
9
10
11
12
13
14
15
16
17
18
19
20


const outFile = 'data/tunes.json'


const getJson = url => fetch(url).then(response => response.json())


const transformTunes = R.pipe(
  // there are bugs in the data, ignore records where the tune id is not a number
  R.filter(tune => parseInt(tune.tune).toString() === tune.tune),
  R.map(tune => ({
    id: tune.tune,

+ 3 other calls in file

build.js

GitHub: raine/flyd-keyboard

15
16
17
18
19
20
21
22
23
24
var _require2 = require('ramda');

var __ = _require2.__;
var liftN = _require2.liftN;
var curry = _require2.curry;
var pipe = _require2.pipe;
var always = _require2.always;
var merge = _require2.merge;
var props = _require2.props;
var apply = _require2.apply;

utils.js

GitHub: b-gran/slack-network-analysis

-2

+ 2 other calls in file

ramda.js

GitHub: corporatepiyush/es6

62
63
64
65
66
67
68
69
70
71
72
73




//pipe (like Unix pipe) works from left to right
//also observe all operation are functions and curry placeholder
// over engineered code
const sumUsingPipe = _.pipe(
    _.filter(_.compose(_.identical(1), _.modulo(_.__, 2))),
    _.map(_.converge(_.multiply, [_.identity, _.identity])), // dont try this at home
    _.reduce(_.add, 0)
)

selectors.js

GitHub: otpusk/apisearch-toolbox

152
153
154
155
156
157
158
159
160
161
162
    }, countries);
  });
};


exports.getCountry = getCountry;
var getTopCountry = (0, _reselect.createSelector)(getCountries, R.pipe(R.sort(R.descend(R.prop('weight'))), R.head));
exports.getTopCountry = getTopCountry;
var getHotelsStore = (0, _reselect.createSelector)(domain, function (geo) {
  return geo.get('hotels');
});

selectors.js

GitHub: otpusk/apisearch-toolbox

103
104
105
106
107
108
109
110
111
112
113
114
  return !R.isEmpty(search);
});
exports.isSetSearch = isSetSearch;


var getHotelsByPages = function getHotelsByPages() {
  return (0, _reselect.createSelector)(searchByKey, R.pipe(R.prop('hotels'), R.values));
};


var getHotelsByMinPrice = function getHotelsByMinPrice() {
  return (0, _reselect.createSelector)(getHotelsByPages(), (0, _selectors.getOffers)(), _selectors3.getQuery, function (pages, offersMap, query) {

+ 83 other calls in file

Other functions in ramda

Sorted by popularity

ramda.clone is the most popular function in ramda (30311 examples)

Other popular packages:

Home

About