Filter with multiple predicates, elegant functional approach

I'm trying to implement filtration logic in my app. There's a table and every column header contains an input field and dropdown with filter options, you can set a filter by selecting an option...

How to use lodash to find and return an object from Array?

My objects: [ { description: 'object1', id: 1 }, { description: 'object2', id: 2 } { description: 'object3', id: 3 } { description:...

Combine multiple filter() predicates in Underscore / Ramda / Functional languages / Libraries

For a list of data I want to filter it using several predicates and then do an operation on each filter. Eg. if my data is: var people = [ {name: 'Sachin', profession: 'doctor', cases:...

why are folktale and ramda so different?

I'm learning javascript FP by reading DrBoolean's book. I searched around for functional programming library. I found Ramda and Folktale. Both claim to be functional programming library. But they...

Pointfree recursion in JS with ramda

I am learning about pointfree functions and am trying to implement this recursive null remover in that style. Works, but is not pointfree: function removeNulls(obj) { return R.ifElse( ...

How to append to an array after cherry picking keys of another using Ramda

I have an existing array of objects const oldData = [ {'one': 1, 'two': 2}, {'one': 3, 'two': 4} ]; I have a new array of objects: const newData = [ {'three': 5, 'two': 6, 'one': 7}, ...

How to filter out specific keys from object using Ramda?

http://ramdajs.com/0.21.0/docs/#prop Ramda Repl var myObject = {a: 1, b: 2, c: 3, d: 4}; var newObject = R.filter(R.props('a'), myObject); //var newObject = R.filter(R.equals(R.props('a')),...

How To Cache Images in React?

Suppose I have a list of url's like so : [ '/images/1', '/images/2', ... ] And I want to prefetch n of those so that transitioning between images is faster. What I am doing now in...

How to remove ESlint error no-unresolved from importing 'react'

no-unresolved https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-unresolved.md After installing eslint-import-resolver-webpack My .eslintrc config { "extends":...

How to check if different props are equal in Ramda?

How would I go about checking if first and last are equivalent here? const obj = { first: 5, last: 5, } This is a small part of a much bigger problem which I will paste here just for...

Ramda propOr type error in Typescript

This is a simple question, I just cannot find out how to resolve type Typescript typing issue while using Ramda. My code const podName = R.propOr(null, 'podName', node) as String |...

NPM: Field 'browser' doesn't contain a valid alias configuration

Executing This: node .\node_modules\webpack\bin\webpack.js --config scripts/webpack.config.js --display-error-details Produces this error. I am just testing this at the moment, so application.ts...

React Formik : how to use custom onChange and onBlur

I'm starting out with the formik library for react, and I can't figure out the usage of the props handleChange and handleBlur. According to the docs, handleBlur can be set as a prop on a...

react native app works on debug mode, but not works release mode on ios

I Have an app on react native. Debug mode works on ios. But Release mode not works. I tried change the optimization level but not helped. The problem that I don't see any error. Just not working...

How can I deeply map over object with Ramda

I'm trying to find all "template values" e.g. { template: 'Date: <now>'} using a map function to get this basic behaviour: deepMap(mapFn, {a: 1, b: { c: 2, d: { template: 'Date: <now>'}}}) >> {a:...

How to translate a normal application to a pipe or compose

I have a function with two arguments. For the sake of simplicity let's assume it just subtracts the numbers. I want to flip and curry its arguments. I have figured out how to do it manually, but...

Typescript styled-component error: "Type '{ children: string; }' has no properties in common with type 'IntrinsicAttributes'."

Getting a typescript error on my styled-component Type '{ children: string; }' has no properties in common with type 'IntrinsicAttributes'.ts(2559) import React from 'react' import {...

How to type a function for renaming object keys in Typescript

I have a function that takes a string transformation function and a an object and applies the transformation to all of the keys, returning the resulting object. In particular I'm using Ramda Here...

Ramda: How to remove keys in objects with empty values?

I have this object: let obj = { matrimonyUrl: 'christian-grooms', search_criteria: 'a:2:{s:6:"gender";s:4:"Male";s:9:"community";s:9:"Christian";}', mothertongue: null, religion:...

Using jest with tensorflow.js produces error

I receive an error when I try to run tensorflow.js with jest. I import the node backend and it immediately errors. If I run normally (not using jest) then I get no such error. FAIL ...

Coverage Reports with Instanbul JS, Vue JS, Vue CLI, Cypress e2e tests, and Typescript only showing a few files

I'm running a VueJS app written in Typescript and am testing it with Cypress e2e tests. I'd like to get coverage reports setup to see how much of my code I've covered with the tests so I attempted...

How to combine two array using ramda library?

I have two array as below const l1 = [ {"a": 1, "a1": 2}, {"b": 3, "b1": 4}, {"c": 5, "c1": 6} ]; const l2 = [ {"d": 2}, {"e": 2}, {"f": 2} ]; How can I use ramda library to combine these two...

Ramda typescript is giving typescript compilation errors

Added @types/ramda Now I get typescript errors from @types/ramda Failed to compile. /Users/xx/WebstormProjects/xx/frontend/node_modules/@types/ramda/index.d.ts TypeScript error: ',' expected. ...

How to extract the value out of Monads in the Crocks javascript library

I understand that monads typically don't want to unwrap the underlying value because it may or may not exist. In my use case I would like to use functional programming techniques, using ramda for...

pip install error: Microsoft Visual C++ 14.0 or greater is required

I want to install Twint with: pip install twint But it failed and generating this error: ERROR: Command errored out with exit status 1: command:...

Typing Error using Ramda Pipe in Typescript

I am using Ramda's pipe method. It runs fine but it is giving some type error on first argument flatten. I am not sure what it is about. Can anyone please explain the issue? Code:...

SSR React Application using loadable library, throws “Cannot convert undefined or null to object” error intermittently on the server for Home Route

I have a (Server Side Rendered)SSR application built using React & Redux. I also use the loadable library. The application is hosted on Heroku and uses Cloudflare caching. The application...

Version of TypeScript not officially supported by typescript-eslint-parser

I inherited an old AngularJs application which use the legacy tools: bower and grunt. When I run grunt serve --reload, I have the following warning message: WARNING: You are currently running a...

Filter an array where obj[array[@]] is nil or empty

Practising Ramda again. So the situation is I have an obj: const originalObj = { foo: "bar", std: "min", baz: "", key1: undefined, key2: "exit", key3: "val3", key4: "", }; And I...

How do I get details of a veracode vulnerability report?

How do I get details of a veracode vulnerability report? I'm a maintainer of a popular JS library, Ramda, and we've recently received a report that the library is subject to a prototype pollution...