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How to use the converge function from ramda

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

ramda.converge is a higher-order function that takes multiple functions and a combining function, applies the input arguments to each of the provided functions, and then passes the results to the combining function.

utils.js

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 */
exports.formatSuperLinterOutput = (output) => {
  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")),

+ 5 other calls in file

index.js

GitHub: MatthieuLemoine/immersive

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const { mergeExport: merge } = require('./utils');
const { setupReplServer } = require('./command/internals/repl');


const isNotEmptyOrNil = compose(
  not,
  converge(or, [isNil, isEmpty]),
);


async function immersive(userConfig = {}) {
  const {

How does ramda.converge work?

ramda.converge is a higher-order function that takes a function and a list of functions and returns a new function. The new function takes arguments that are passed to each function in the list and then passes the results of those functions as arguments to the first function.

utils.js

GitHub: alvaro-cuesta/aoc-js

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  }


  return a
}


const lcm = R.converge(R.divide, [R.multiply, gcd])


const frequency = (x) =>
  R.reduce(
    (freqs, x) => {

+ 4 other calls in file

14.js

GitHub: alvaro-cuesta/aoc-js

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      ),
    ),
  ),
)


const boardFromInput = R.converge(
  R.reduce((acc, row) => {
    for (const [from, to] of R.aperture(2, row)) {
      for (const pos of iterateStraightLines(from, to)) {
        acc[vec.key(pos)] = '#'

+ 2 other calls in file

Ai Example

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const greet = (greeting, name) => `${greeting} ${name}!`;

const greetWithExcitement = R.converge(greet, [R.toUpper, R.identity]);

console.log(greetWithExcitement("hello", "world")); // "HELLO world!"

In this example, R.converge is used to create a new function that takes two arguments: a greeting and a name. The greet function concatenates these two arguments into a string, and the greetWithExcitement function is created by calling R.converge with greet as the first argument, and an array of two functions as the second argument. The first function in the array, R.toUpper, converts the greeting argument to uppercase, while the second function, R.identity, simply returns the name argument. The result is a function that will take two arguments (greeting and name), convert the greeting to uppercase, and then call greet with the two arguments.

08.js

GitHub: alvaro-cuesta/aoc-js

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const part1 = (input) => {
  const grid = parseBoard(input)


  return R.pipe(
    R.converge(R.xprod, [
      R.pipe(R.prop(0), R.length, R.range(0)),
      R.pipe(R.length, R.range(0)),
    ]),
    R.filter(isVisible(grid)),

+ 5 other calls in file

ramda.md?plain=1

GitHub: shuiniuer/blog

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// 4
// 相当于 28 除以 7

var toUpperCase = s => s.toUpperCase();
var toLowerCase = s => s.toLowerCase();
var strangeConcat = R.converge(R.concat, [toUpperCase, toLowerCase])
strangeConcat("Yodel")
// "YODELyodel"
// 相当于 R.concat('YODEL', 'yodel')
```

+ 3 other calls in file

index.js

GitHub: Ferlab-Ste-Justine/node-jwt

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  (expiry_getter_fn, get_current_time_in_seconds_fn, decrypted_token) => Either(decrypted_token | TokenExpiryError)
*/
const check_token_expiry = R.curry((expiryGetter, getCurrentTimeInSeconds, token) => {
    return R.ifElse(
        R.either(
            R.converge(R.lt, [getCurrentTimeInSeconds, expiryGetter]),
            R.compose(R.isNil, expiryGetter)
        ),
        Either.Right,
        (token) => Either.Left(new TokenExpiryError("Token is expired"))

+ 209 other calls in file

bundle.js

GitHub: areca/misc

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 *
 *      //≅ multiply( add(1, 2), subtract(1, 2) );
 *      R.converge(multiply, [add, subtract])(1, 2); //=> -3
 *
 *      var add3 = (a, b, c) => a + b + c;
 *      R.converge(add3, [multiply, add, subtract])(1, 2); //=> 4
 */
var converge = _curry2(function converge(after, fns) {
    return curryN(reduce(max, 0, pluck('length', fns)), function () {
        var args = arguments;

+ 56 other calls in file

index.js

GitHub: VesaLahd/aoc2022

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const parseOperation = withDivide => R.compose(
  createFromKey('operation'),
  fn => value => {
    return withDivide ? Math.floor(R.divide(fn(value, value), 3)) : fn(value, value)
  },
  R.converge(R.apply, [
    R.ifElse(
      R.compose(R.equals('*'), R.nth(1)),
      R.always(R.multiply),
      R.always(R.add),

+ 11 other calls in file

findById.js

GitHub: zlatanpham/ramda-jest-practise

-2

binary_search.js

GitHub: elasfarc/DSA

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  R.divide(R.__, 2),
  R.apply(R.add),
  R.props(["upper", "lower"])
);


const getMidElement = R.converge(R.nth, [getMidIndex, R.prop("list")]);
const getSearchValue = R.prop("searchValue");


var binarySearch = R.compose(
  R.prop("ans"),

+ 17 other calls in file

cyclejs-audio-driver.js

GitHub: jemmyw/cyclejs-audio-driver

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*
*      var indentN = R.pipe(R.times(R.always(' ')),
*                           R.join(''),
*                           R.replace(/^(?!$)/gm));
*
*      var format = R.converge(R.call, [
*                                  R.pipe(R.prop('indent'), indentN),
*                                  R.prop('value')
*                              ]);
*

+ 53 other calls in file

index.js

GitHub: VesaLahd/aoc2022

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const forest = R.map(R.map(Number), content)
const width = R.compose(R.length, R.head)(forest)
const height = R.length(forest)


const flatForest = R.converge(R.reduce(R.concat), [R.head, R.tail])(forest)
const indexToCoordinates = R.converge(Array.of, [R.modulo(R.__, width), R.compose(Math.floor, R.divide(R.__, height))])


const splits = R.curry((index, row) => R.compose(R.converge(Array.of, [R.head, R.compose(R.drop(1), R.last)]), R.splitAt(index))(row))
const isVisibleFromEitherDirection = R.curry((splits, value) => R.any(R.all(R.gt(value)), splits))

+ 5 other calls in file

build

GitHub: desenmeng/ramda

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//  abortIfNotSorted :: List[{*}] -> List[{*}]
var abortIfNotSorted = R.tap(R.cond([[
  R.complement(R.pipe(
      R.pluck('id'),
      R.pluck('name'),
      R.converge(R.equals, R.identity, R.sortBy(R.identity))
    )),
  R.pipe(
      R.path(['0', 'loc', 'source']),
      R.concat('Dependencies not declared in alphabetical order in '),

+ 2 other calls in file

ramda-demo.js

GitHub: dqmmpb/define-demos

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  return sum;
}


var lengthOfArr = arr => arr.length;


var average = R.converge(R.divide, [sumOfArr, lengthOfArr]);


log(average([1, 2, 3, 4, 5, 6, 7]));
log(sumOfArr([1, 2, 3, 4, 5, 6, 7]));

+ 29 other calls in file

index.js

GitHub: VesaLahd/aoc2022

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const r = row(cave, R.head(blocked))

const nextDropX = R.compose(
  R.head,
  R.reject(R.compose(isBlocked, R.last)),
  R.converge(R.zip, [R.identity, R.map(R.nth(R.__, r))]),
  R.converge(Array.of, [R.dec, R.inc]),
)(startPoint[0])

if (!nextDropX) return coordinatesToIndex([startPoint[0], R.dec(R.head(blocked))])

+ 5 other calls in file

recommendation.js

GitHub: vhutov/personalised-recommender

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        (await Promise.allSettled(flows))
            .filter((v) => v.value)
            .map((v) => v.value)
            .flat()

    return R.converge(convergingF, pipes)(input)
}

/**
 * Creates sequential composition of flows

bundle.js

GitHub: Gaoey/canvas-vertice-google-detected-text

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*
*      const indentN = R.pipe(R.repeat(' '),
*                           R.join(''),
*                           R.replace(/^(?!$)/gm));
*
*      const format = R.converge(R.call, [
*                                  R.pipe(R.prop('indent'), indentN),
*                                  R.prop('value')
*                              ]);
*

+ 19 other calls in file

index.js

GitHub: VesaLahd/aoc2022

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  R.map(parseInstruction)
)(content)


const part1 = R.compose(
  R.sum,
  R.converge(Array.of, indices),
  R.addIndex(R.map)((value, index) => R.multiply(value, R.inc(index))),
)(registerValues)


const screen = R.addIndex(R.map)((_, i) => R.inc(i), Array(40*6))

index.js

GitHub: VesaLahd/aoc2022

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)(content)


const moveRopeKnots = R.curry((rope, direction) => R.converge(
  R.scan((acc, knot) => R.when(
      R.compose(R.lt(Math.sqrt(2)), distanceBetweenPoints(acc)), 
      R.converge(move, [R.compose(vectorComponentCap, R.flip(vectorBetween)(acc)), R.identity])
    )(knot)
  ), [R.compose(move(direction), R.head), R.tail])(rope)
)

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