codemods

A collection of codemods for performing automated code refactoring.

Usage

These codemods require jscodeshift so let's start by installing that.

npm install -g jscodeshift

Then check out this repo.

git clone https://github.com/kevinbarabash/codemods

Finally, run one of the codemods on your code.

jscodeshift -t /path/to/transforms/transform.js /path/to/your/code

Transforms

Multiple transforms are grouped into a single codemod. Some transforms output ES2016+ code. Please check the output and verify that the code will work for you before committing changes.

array.js

_.head(x) -> x[0]
_.head(x, n) -> x.slice(n)
_.first (alias for _.head)
_.tail(x) -> x.slice(1)
_.tail(x, n) -> x.slice(n)
_.rest (alias for _.tail)
_.last(x) -> x[x.length - 1]
_.last(x, n) -> x.slice(x.length - n)

function.js

_.bind(fn, obj, ...x) -> fn.bind(obj, ...x)
_.partial(fn, a, b); -> (...args) => fn(a, b, ...args)

object.js

_.clone(x) -> { ...x }
_.extend({}, x, y) -> { ...x, ...y }
_.extend(obj, x, y) -> Object.assign(obj, x, y)
_.keys(x) -> Object.keys(x)
_.pairs(x) -> Object.entries(x)
_.values(x) -> Object.values(x)

util.js

_.isArray(x) -> Array.isArray(x)
_.isBoolean(x) -> typeof(x) === 'boolean'
_.isFinite(x) -> Number.isFinite(x)
_.isFunction(x) -> typeof(x) === 'function'
_.isNull(x) -> x === null
_.isString(x) -> typeof(x) === 'string'
_.isUndefined(x) -> typeof(x) === 'undefined'

kevinbarabash / codemods