{"id":15290751,"url":"https://github.com/alex-aralis/yank-down","last_synced_at":"2026-05-13T07:04:37.239Z","repository":{"id":57403148,"uuid":"86850631","full_name":"Alex-Aralis/yank-down","owner":"Alex-Aralis","description":"Yank a curried parameter down to be the first argument passed.","archived":false,"fork":false,"pushed_at":"2017-04-07T20:39:00.000Z","size":168,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":2,"default_branch":"master","last_synced_at":"2024-04-26T04:20:19.358Z","etag":null,"topics":["browser","client-side","currying","functional-programming","javascrit","nodejs","npm","npm-package","server-side"],"latest_commit_sha":null,"homepage":null,"language":"JavaScript","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/Alex-Aralis.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2017-03-31T18:51:13.000Z","updated_at":"2017-04-01T23:05:22.000Z","dependencies_parsed_at":"2022-09-18T12:00:46.028Z","dependency_job_id":null,"html_url":"https://github.com/Alex-Aralis/yank-down","commit_stats":null,"previous_names":[],"tags_count":8,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/Alex-Aralis%2Fyank-down","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/Alex-Aralis%2Fyank-down/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/Alex-Aralis%2Fyank-down/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/Alex-Aralis%2Fyank-down/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/Alex-Aralis","download_url":"https://codeload.github.com/Alex-Aralis/yank-down/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":245232914,"owners_count":20581703,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["browser","client-side","currying","functional-programming","javascrit","nodejs","npm","npm-package","server-side"],"created_at":"2024-09-30T16:09:20.181Z","updated_at":"2026-05-13T07:04:37.205Z","avatar_url":"https://github.com/Alex-Aralis.png","language":"JavaScript","funding_links":[],"categories":[],"sub_categories":[],"readme":"\n# Yank Down\n\n[![npm version](https://badge.fury.io/js/yank-down.svg)](https://badge.fury.io/js/yank-down) [![devpendencies](https://david-dm.org/Alex-Aralis/yank-down.svg)](https://david-dm.org/Alex-Aralis/yank-down) [![Build Status](https://travis-ci.org/Alex-Aralis/yank-down.svg?branch=master)](https://travis-ci.org/Alex-Aralis/yank-down) [![codecov](https://codecov.io/gh/Alex-Aralis/yank-down/branch/master/graph/badge.svg)](https://codecov.io/gh/Alex-Aralis/yank-down)\n\n\n\nHave you ever been unsure what value to pass first in a curried function?\n\n```javascript\nconst divide = numerator =\u003e denominator =\u003e numerator/denominator;\n```\n\nand ended up getting it wrong?\n\n```javascript\nconst needToBeDividedBy3 = [1,3,4,5,2];\n\nconst wrongAnswer = needToBeDivided.map(divide(3));\n                                     // ^^^^^^^^^\n                                     // would return 3/number :/\n```\n\nEnter yankDown, the titular function of this module.\n\n```javascript\nimport { yankDown } from 'yank-down'; // import yankDown\n\nconst flippedDivide = yankDown(divide)(1); // yank arg 1 to be arg 0\n\nconst correctAnswer = needToBeDivided.map(flippedDivide(3));\n                                       // ^^^^^^^^^^^^^^^^\n                                       // arg 1 yanked down to arg 0\n```\n\n_AMAZING!!!_\n\n### Multi-Parameter Functions\nYank Down will even work with multi-parameter functions.\n\n```javascript\n\nconst factoryFactory =\n  (factoryName, factoryConfig = {}) =\u003e\n    (objProps = {}) =\u003e\n      { ...objProps, factoryConfig, type: factoryName }\n;\n\nconst flippedFF = yankDown(factoryFactory)(1); // yankDown properly flips calls\n```\n\n_SO CONVENIENT_\n\n### Arbitrary Curry Depth\n\nAs you would expect, yankDown can work with curried functions of arbitrary depth\n\n```javascript\nconst makeArray = one =\u003e two =\u003e three =\u003e [one, two, three];\n\nconsole.log(makeArray(1)(2)(3)); // [1, 2, 3];\n\nconst yankedMakeArray = yankDown(makeArray)(1);\n\nconsole.log(yankedMakeArray(1)(2)(3)); // [2, 1, 3]\n```\n\n*JUST WOW.*\n\n### Yank supports binding syntax.\n\nalso, yankDown is exported as yank\n\n```javascript\nimport { yank } from 'yank-down';\n\n// this is equivalent to\nyank(makeArray)(1);\n\n// this\nyank.bind(makeArray)(1);\n\n// and this (using new :: function binding)\nmakeArray::yank(1);\n\n```\n\n## yank-down also has 2 other utility functions\n\n### collect\n\n`collect` is a function that creates a `depth` deep curried thunk that collects arguments and then either returns them or passes them to a passed callback `cb`.\n\n```javascript\ncollect(depth, cb = false, preexistingArgsList = [])\n```\n\nIt's really no so bad.  Here's an example\n\n```javascript\nimport { collect } from 'yank-down';\n\ncosnt thunk = collect(3) // produces a depth 3 thunk.\n\nexpect(thunk(1)(2)(3)).to.deep.equal([[1], [2], [3]]);\n\nconst cbThunk = collect(4, console.log);\n\ncbThunk('a', 'e')('b')('c')('d'); // prints [['a', 'e'], ['b'], ['c'], ['d']]\n```\n\n### apply\n\n`apply` takes a list of lists of arguments like what is produced by `collect` and _applies_ it to a curried thunk, then returns the result.\n\n```javascript\napply(curriedFunc)(argsListList)\n```\n\nCheck it out.\n```javascript\nimport { apply } from 'yank-down';\n\napply(makeArray)([[1], [2]]); // returns c =\u003e [1, 2, c]\n\napply(makeArray)([['one'], ['two'], ['three']]); // returns ['one', 'two', 'three']\n\n// apply can also use bind syntax to get its functions\nmakeArray::apply([['such'], ['cool']])('amaze'); // returns ['such', 'cool', 'amaze']\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Falex-aralis%2Fyank-down","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Falex-aralis%2Fyank-down","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Falex-aralis%2Fyank-down/lists"}