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0

I have an an array of objects. My objective is to remove objects that contain keys with empty arrays.

I am using ramda, but am hitting a wall at the moment.

const myData = 
 "one": 
 "two": 
 "id": "1",
 "three": [
 "id": "33",
 "copy": [
 "id": "1",
 "text": "lorem",
 "answer": [],
 ,
 
 "id": "2",
 "text": "ipsum",
 "answer": [
 "id": 1,
 "class": "science"
 ]
 ,
 
 "id": "3",
 "text": "baesun",
 "answer": [
 "id": 2,
 "class": "reading"
 ]
 
 ],
 ]
 

 


flatten(pipe(
 path(['one', 'two', 'three']),
 map(step => step.copy.map(text => (
 answers: text.answer.map(answer => (
 class: answer.class,
 )),
 ), ), ))
 (myData))

This the result:

["answers": [], "answers": ["class": "science"], "answers": ["class": "reading"]]

This is the expectation:

["answers": ["class": "science"], "answers": ["class": "reading"]]

javascript ramda.js

share|improve this question

edited Mar 27 at 0:27

Ele

26.8k66 gold badges2424 silver badges5454 bronze badges

asked Mar 27 at 0:25

samrumlinsamrumlin

1

add a comment | 

0

I have an an array of objects. My objective is to remove objects that contain keys with empty arrays.

I am using ramda, but am hitting a wall at the moment.

const myData = 
 "one": 
 "two": 
 "id": "1",
 "three": [
 "id": "33",
 "copy": [
 "id": "1",
 "text": "lorem",
 "answer": [],
 ,
 
 "id": "2",
 "text": "ipsum",
 "answer": [
 "id": 1,
 "class": "science"
 ]
 ,
 
 "id": "3",
 "text": "baesun",
 "answer": [
 "id": 2,
 "class": "reading"
 ]
 
 ],
 ]
 

 


flatten(pipe(
 path(['one', 'two', 'three']),
 map(step => step.copy.map(text => (
 answers: text.answer.map(answer => (
 class: answer.class,
 )),
 ), ), ))
 (myData))

This the result:

["answers": [], "answers": ["class": "science"], "answers": ["class": "reading"]]

This is the expectation:

["answers": ["class": "science"], "answers": ["class": "reading"]]

javascript ramda.js

share|improve this question

edited Mar 27 at 0:27

Ele

26.8k66 gold badges2424 silver badges5454 bronze badges

asked Mar 27 at 0:25

samrumlinsamrumlin

1

add a comment | 

I have an an array of objects. My objective is to remove objects that contain keys with empty arrays.

I am using ramda, but am hitting a wall at the moment.

const myData = 
 "one": 
 "two": 
 "id": "1",
 "three": [
 "id": "33",
 "copy": [
 "id": "1",
 "text": "lorem",
 "answer": [],
 ,
 
 "id": "2",
 "text": "ipsum",
 "answer": [
 "id": 1,
 "class": "science"
 ]
 ,
 
 "id": "3",
 "text": "baesun",
 "answer": [
 "id": 2,
 "class": "reading"
 ]
 
 ],
 ]
 

 


flatten(pipe(
 path(['one', 'two', 'three']),
 map(step => step.copy.map(text => (
 answers: text.answer.map(answer => (
 class: answer.class,
 )),
 ), ), ))
 (myData))

This the result:

["answers": [], "answers": ["class": "science"], "answers": ["class": "reading"]]

This is the expectation:

["answers": ["class": "science"], "answers": ["class": "reading"]]

javascript ramda.js

share|improve this question

edited Mar 27 at 0:27

Ele

26.8k66 gold badges2424 silver badges5454 bronze badges

asked Mar 27 at 0:25

samrumlinsamrumlin

1

const myData = 
 "one": 
 "two": 
 "id": "1",
 "three": [
 "id": "33",
 "copy": [
 "id": "1",
 "text": "lorem",
 "answer": [],
 ,
 
 "id": "2",
 "text": "ipsum",
 "answer": [
 "id": 1,
 "class": "science"
 ]
 ,
 
 "id": "3",
 "text": "baesun",
 "answer": [
 "id": 2,
 "class": "reading"
 ]
 
 ],
 ]
 

 


flatten(pipe(
 path(['one', 'two', 'three']),
 map(step => step.copy.map(text => (
 answers: text.answer.map(answer => (
 class: answer.class,
 )),
 ), ), ))
 (myData))

["answers": [], "answers": ["class": "science"], "answers": ["class": "reading"]]

["answers": ["class": "science"], "answers": ["class": "reading"]]

share|improve this question

edited Mar 27 at 0:27

Ele

26.8k66 gold badges2424 silver badges5454 bronze badges

asked Mar 27 at 0:25

samrumlinsamrumlin

1

share|improve this question

edited Mar 27 at 0:27

Ele

26.8k66 gold badges2424 silver badges5454 bronze badges

asked Mar 27 at 0:25

samrumlinsamrumlin

1

edited Mar 27 at 0:27

Ele

26.8k66 gold badges2424 silver badges5454 bronze badges

edited Mar 27 at 0:27

Ele

26.8k66 gold badges2424 silver badges5454 bronze badges

asked Mar 27 at 0:25

samrumlinsamrumlin

1

asked Mar 27 at 0:25

samrumlinsamrumlin

1

2 Answers
2

active

oldest

votes

3

Get the the array of inside three with path, chain the arrays inside the copy properties, and project them to contain only answer. Reject empty answers, and then evolve the objects inside each answer to contain only the class property.

const pipe, path, chain, prop, project, reject, propSatisfies, isEmpty, map, evolve = ramda

const transform = pipe(
 path(['one', 'two', 'three']), // get the array
 chain(prop('copy')), // concat the copy to a single array
 project(['answer']), // extract the answers 
 reject(propSatisfies(isEmpty, 'answer')), // remove empty answers
 map(evolve( answer: project(['class']) )) // convert the objects inside each answer to contain only class
)

const data = "one":"two":"id":"1","three":["id":"33","copy":["id":"1","text":"lorem","answer":[],"id":"2","text":"ipsum","answer":["id":1,"class":"science"],"id":"3","text":"baesun","answer":["id":2,"class":"reading"]]]

const result = transform(data)

console.log(result)

<script src="//bundle.run/ramda@0.26.1"></script>

share|improve this answer

edited Mar 27 at 9:11

answered Mar 27 at 8:12

Ori DroriOri Drori

91.6k1515 gold badges104104 silver badges109109 bronze badges

add a comment | 

0

use filter

const filter = R.filter,
 flatten = R.flatten,
 pipe = R.pipe,
 path = R.path,
 map = R.map;

const myData = 
 "one": 
 "two": 
 "id": "1",
 "three": [
 "id": "33",
 "copy": [
 "id": "1",
 "text": "lorem",
 "answer": [],
 ,
 
 "id": "2",
 "text": "ipsum",
 "answer": [
 "id": 1,
 "class": "science"
 ]
 ,
 
 "id": "3",
 "text": "baesun",
 "answer": [
 "id": 2,
 "class": "reading"
 ]
 
 ],
 ]
 

 


const result = filter(answersObj => answersObj.answers.length, flatten(pipe(
 path(['one', 'two', 'three']),
 map(step => step.copy.map(text => (
 answers: text.answer.map(answer => (
 class: answer.class,
 ))
 )))
)(myData)))

console.log(result);

<script src="//cdnjs.cloudflare.com/ajax/libs/ramda/0.25.0/ramda.min.js"></script>

share|improve this answer

edited Mar 27 at 1:19

answered Mar 27 at 0:33

ajai Jothiajai Jothi

1,43511 gold badge44 silver badges1313 bronze badges

add a comment | 

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3

Get the the array of inside three with path, chain the arrays inside the copy properties, and project them to contain only answer. Reject empty answers, and then evolve the objects inside each answer to contain only the class property.

const pipe, path, chain, prop, project, reject, propSatisfies, isEmpty, map, evolve = ramda

const transform = pipe(
 path(['one', 'two', 'three']), // get the array
 chain(prop('copy')), // concat the copy to a single array
 project(['answer']), // extract the answers 
 reject(propSatisfies(isEmpty, 'answer')), // remove empty answers
 map(evolve( answer: project(['class']) )) // convert the objects inside each answer to contain only class
)

const data = "one":"two":"id":"1","three":["id":"33","copy":["id":"1","text":"lorem","answer":[],"id":"2","text":"ipsum","answer":["id":1,"class":"science"],"id":"3","text":"baesun","answer":["id":2,"class":"reading"]]]

const result = transform(data)

console.log(result)

<script src="//bundle.run/ramda@0.26.1"></script>

share|improve this answer

edited Mar 27 at 9:11

answered Mar 27 at 8:12

Ori DroriOri Drori

91.6k1515 gold badges104104 silver badges109109 bronze badges

add a comment | 

3

Get the the array of inside three with path, chain the arrays inside the copy properties, and project them to contain only answer. Reject empty answers, and then evolve the objects inside each answer to contain only the class property.

const pipe, path, chain, prop, project, reject, propSatisfies, isEmpty, map, evolve = ramda

const transform = pipe(
 path(['one', 'two', 'three']), // get the array
 chain(prop('copy')), // concat the copy to a single array
 project(['answer']), // extract the answers 
 reject(propSatisfies(isEmpty, 'answer')), // remove empty answers
 map(evolve( answer: project(['class']) )) // convert the objects inside each answer to contain only class
)

const data = "one":"two":"id":"1","three":["id":"33","copy":["id":"1","text":"lorem","answer":[],"id":"2","text":"ipsum","answer":["id":1,"class":"science"],"id":"3","text":"baesun","answer":["id":2,"class":"reading"]]]

const result = transform(data)

console.log(result)

<script src="//bundle.run/ramda@0.26.1"></script>

share|improve this answer

edited Mar 27 at 9:11

answered Mar 27 at 8:12

Ori DroriOri Drori

91.6k1515 gold badges104104 silver badges109109 bronze badges

add a comment | 

Get the the array of inside three with path, chain the arrays inside the copy properties, and project them to contain only answer. Reject empty answers, and then evolve the objects inside each answer to contain only the class property.

const pipe, path, chain, prop, project, reject, propSatisfies, isEmpty, map, evolve = ramda

const transform = pipe(
 path(['one', 'two', 'three']), // get the array
 chain(prop('copy')), // concat the copy to a single array
 project(['answer']), // extract the answers 
 reject(propSatisfies(isEmpty, 'answer')), // remove empty answers
 map(evolve( answer: project(['class']) )) // convert the objects inside each answer to contain only class
)

const data = "one":"two":"id":"1","three":["id":"33","copy":["id":"1","text":"lorem","answer":[],"id":"2","text":"ipsum","answer":["id":1,"class":"science"],"id":"3","text":"baesun","answer":["id":2,"class":"reading"]]]

const result = transform(data)

console.log(result)

<script src="//bundle.run/ramda@0.26.1"></script>

share|improve this answer

edited Mar 27 at 9:11

answered Mar 27 at 8:12

Ori DroriOri Drori

91.6k1515 gold badges104104 silver badges109109 bronze badges

const pipe, path, chain, prop, project, reject, propSatisfies, isEmpty, map, evolve = ramda

const transform = pipe(
 path(['one', 'two', 'three']), // get the array
 chain(prop('copy')), // concat the copy to a single array
 project(['answer']), // extract the answers 
 reject(propSatisfies(isEmpty, 'answer')), // remove empty answers
 map(evolve( answer: project(['class']) )) // convert the objects inside each answer to contain only class
)

const data = "one":"two":"id":"1","three":["id":"33","copy":["id":"1","text":"lorem","answer":[],"id":"2","text":"ipsum","answer":["id":1,"class":"science"],"id":"3","text":"baesun","answer":["id":2,"class":"reading"]]]

const result = transform(data)

console.log(result)

<script src="//bundle.run/ramda@0.26.1"></script>

const pipe, path, chain, prop, project, reject, propSatisfies, isEmpty, map, evolve = ramda

const transform = pipe(
 path(['one', 'two', 'three']), // get the array
 chain(prop('copy')), // concat the copy to a single array
 project(['answer']), // extract the answers 
 reject(propSatisfies(isEmpty, 'answer')), // remove empty answers
 map(evolve( answer: project(['class']) )) // convert the objects inside each answer to contain only class
)

const data = "one":"two":"id":"1","three":["id":"33","copy":["id":"1","text":"lorem","answer":[],"id":"2","text":"ipsum","answer":["id":1,"class":"science"],"id":"3","text":"baesun","answer":["id":2,"class":"reading"]]]

const result = transform(data)

console.log(result)

<script src="//bundle.run/ramda@0.26.1"></script>

const pipe, path, chain, prop, project, reject, propSatisfies, isEmpty, map, evolve = ramda

const transform = pipe(
 path(['one', 'two', 'three']), // get the array
 chain(prop('copy')), // concat the copy to a single array
 project(['answer']), // extract the answers 
 reject(propSatisfies(isEmpty, 'answer')), // remove empty answers
 map(evolve( answer: project(['class']) )) // convert the objects inside each answer to contain only class
)

const data = "one":"two":"id":"1","three":["id":"33","copy":["id":"1","text":"lorem","answer":[],"id":"2","text":"ipsum","answer":["id":1,"class":"science"],"id":"3","text":"baesun","answer":["id":2,"class":"reading"]]]

const result = transform(data)

console.log(result)

<script src="//bundle.run/ramda@0.26.1"></script>

share|improve this answer

edited Mar 27 at 9:11

answered Mar 27 at 8:12

Ori DroriOri Drori

91.6k1515 gold badges104104 silver badges109109 bronze badges

answered Mar 27 at 8:12

Ori DroriOri Drori

91.6k1515 gold badges104104 silver badges109109 bronze badges

answered Mar 27 at 8:12

Ori DroriOri Drori

91.6k1515 gold badges104104 silver badges109109 bronze badges

0

use filter

const filter = R.filter,
 flatten = R.flatten,
 pipe = R.pipe,
 path = R.path,
 map = R.map;

const myData = 
 "one": 
 "two": 
 "id": "1",
 "three": [
 "id": "33",
 "copy": [
 "id": "1",
 "text": "lorem",
 "answer": [],
 ,
 
 "id": "2",
 "text": "ipsum",
 "answer": [
 "id": 1,
 "class": "science"
 ]
 ,
 
 "id": "3",
 "text": "baesun",
 "answer": [
 "id": 2,
 "class": "reading"
 ]
 
 ],
 ]
 

 


const result = filter(answersObj => answersObj.answers.length, flatten(pipe(
 path(['one', 'two', 'three']),
 map(step => step.copy.map(text => (
 answers: text.answer.map(answer => (
 class: answer.class,
 ))
 )))
)(myData)))

console.log(result);

<script src="//cdnjs.cloudflare.com/ajax/libs/ramda/0.25.0/ramda.min.js"></script>

share|improve this answer

edited Mar 27 at 1:19

answered Mar 27 at 0:33

ajai Jothiajai Jothi

1,43511 gold badge44 silver badges1313 bronze badges

add a comment | 

0

use filter

const filter = R.filter,
 flatten = R.flatten,
 pipe = R.pipe,
 path = R.path,
 map = R.map;

const myData = 
 "one": 
 "two": 
 "id": "1",
 "three": [
 "id": "33",
 "copy": [
 "id": "1",
 "text": "lorem",
 "answer": [],
 ,
 
 "id": "2",
 "text": "ipsum",
 "answer": [
 "id": 1,
 "class": "science"
 ]
 ,
 
 "id": "3",
 "text": "baesun",
 "answer": [
 "id": 2,
 "class": "reading"
 ]
 
 ],
 ]
 

 


const result = filter(answersObj => answersObj.answers.length, flatten(pipe(
 path(['one', 'two', 'three']),
 map(step => step.copy.map(text => (
 answers: text.answer.map(answer => (
 class: answer.class,
 ))
 )))
)(myData)))

console.log(result);

<script src="//cdnjs.cloudflare.com/ajax/libs/ramda/0.25.0/ramda.min.js"></script>

share|improve this answer

edited Mar 27 at 1:19

answered Mar 27 at 0:33

ajai Jothiajai Jothi

1,43511 gold badge44 silver badges1313 bronze badges

add a comment | 

use filter

const filter = R.filter,
 flatten = R.flatten,
 pipe = R.pipe,
 path = R.path,
 map = R.map;

const myData = 
 "one": 
 "two": 
 "id": "1",
 "three": [
 "id": "33",
 "copy": [
 "id": "1",
 "text": "lorem",
 "answer": [],
 ,
 
 "id": "2",
 "text": "ipsum",
 "answer": [
 "id": 1,
 "class": "science"
 ]
 ,
 
 "id": "3",
 "text": "baesun",
 "answer": [
 "id": 2,
 "class": "reading"
 ]
 
 ],
 ]
 

 


const result = filter(answersObj => answersObj.answers.length, flatten(pipe(
 path(['one', 'two', 'three']),
 map(step => step.copy.map(text => (
 answers: text.answer.map(answer => (
 class: answer.class,
 ))
 )))
)(myData)))

console.log(result);

<script src="//cdnjs.cloudflare.com/ajax/libs/ramda/0.25.0/ramda.min.js"></script>

share|improve this answer

edited Mar 27 at 1:19

answered Mar 27 at 0:33

ajai Jothiajai Jothi

1,43511 gold badge44 silver badges1313 bronze badges

const filter = R.filter,
 flatten = R.flatten,
 pipe = R.pipe,
 path = R.path,
 map = R.map;

const myData = 
 "one": 
 "two": 
 "id": "1",
 "three": [
 "id": "33",
 "copy": [
 "id": "1",
 "text": "lorem",
 "answer": [],
 ,
 
 "id": "2",
 "text": "ipsum",
 "answer": [
 "id": 1,
 "class": "science"
 ]
 ,
 
 "id": "3",
 "text": "baesun",
 "answer": [
 "id": 2,
 "class": "reading"
 ]
 
 ],
 ]
 

 


const result = filter(answersObj => answersObj.answers.length, flatten(pipe(
 path(['one', 'two', 'three']),
 map(step => step.copy.map(text => (
 answers: text.answer.map(answer => (
 class: answer.class,
 ))
 )))
)(myData)))

console.log(result);

<script src="//cdnjs.cloudflare.com/ajax/libs/ramda/0.25.0/ramda.min.js"></script>

const filter = R.filter,
 flatten = R.flatten,
 pipe = R.pipe,
 path = R.path,
 map = R.map;

const myData = 
 "one": 
 "two": 
 "id": "1",
 "three": [
 "id": "33",
 "copy": [
 "id": "1",
 "text": "lorem",
 "answer": [],
 ,
 
 "id": "2",
 "text": "ipsum",
 "answer": [
 "id": 1,
 "class": "science"
 ]
 ,
 
 "id": "3",
 "text": "baesun",
 "answer": [
 "id": 2,
 "class": "reading"
 ]
 
 ],
 ]
 

 


const result = filter(answersObj => answersObj.answers.length, flatten(pipe(
 path(['one', 'two', 'three']),
 map(step => step.copy.map(text => (
 answers: text.answer.map(answer => (
 class: answer.class,
 ))
 )))
)(myData)))

console.log(result);

<script src="//cdnjs.cloudflare.com/ajax/libs/ramda/0.25.0/ramda.min.js"></script>

const filter = R.filter,
 flatten = R.flatten,
 pipe = R.pipe,
 path = R.path,
 map = R.map;

const myData = 
 "one": 
 "two": 
 "id": "1",
 "three": [
 "id": "33",
 "copy": [
 "id": "1",
 "text": "lorem",
 "answer": [],
 ,
 
 "id": "2",
 "text": "ipsum",
 "answer": [
 "id": 1,
 "class": "science"
 ]
 ,
 
 "id": "3",
 "text": "baesun",
 "answer": [
 "id": 2,
 "class": "reading"
 ]
 
 ],
 ]
 

 


const result = filter(answersObj => answersObj.answers.length, flatten(pipe(
 path(['one', 'two', 'three']),
 map(step => step.copy.map(text => (
 answers: text.answer.map(answer => (
 class: answer.class,
 ))
 )))
)(myData)))

console.log(result);

<script src="//cdnjs.cloudflare.com/ajax/libs/ramda/0.25.0/ramda.min.js"></script>

share|improve this answer

edited Mar 27 at 1:19

answered Mar 27 at 0:33

ajai Jothiajai Jothi

1,43511 gold badge44 silver badges1313 bronze badges

answered Mar 27 at 0:33

ajai Jothiajai Jothi

1,43511 gold badge44 silver badges1313 bronze badges

answered Mar 27 at 0:33

ajai Jothiajai Jothi

1,43511 gold badge44 silver badges1313 bronze badges