CODEWITHSUNDEEP
javascriptreactjsramda.js
Kintaro
Kintaro

Reputation: 3

map and deep object with Ramda

I need to filter by "segments" properties, in this case i need to filtering by segment : [name: "general]

I Have following array

const lines = [{
    id: 1191,
    name: "dev",
    segments: []
  },
  {
    id: 1192,
    name: "credit",
    folder: "Embarazadas",
    segments: [{
        "name": "general",
      },
      {
        "name": "custom",
      }
    ]
  },
  {
    id: 1311,
    name: "box",
    segments: [{
      "name": "custom",
      "line_id": 1431,
      "id": 21,
      "active": true
    }]
  },
  {
    id: 2000,
    name: "sin folder",
    folder: null,
    segments: [{
        "name": "custom",
      },
      {
        "name": "general",
      }
    ],
  },
  {
    id: 2000,
    name: "credit card",
    segments: [{
      "name": "general",
    }],
  },
]

I need to get all objects with segment "general"

i tried with Ramda doing this but i did not get the result, first i did a maps of the lines, and then a filter. The problem is that sometimes segments attribute arrives empty

const filterLinesBySegments = (lines) => {
  const filter = (line) => {
    const hasSegments =R.filter(seg => seg["name"] === "general")(line.segments)
    const newLine = R.compose(
      R.assoc("segments", hasSegments),
    )(line)
    return newLine

  }
  const new= R.map(item => {
      return R.filter(line => {
        return filter(line)
      })(item)

  })(lines)

  return new;
}

Upvotes: 0

Views: 576

Answers (1)

Ori Drori
Ori Drori

Reputation: 193087

To keep only lines which has a general segment, you can use R.filter, with R.where to filter by a specific property. Since segments is an array, use R.any to search if some of the objects has the name of general.

To remove custom from segment you can evolve the object's segments, and reject all items with name: custom.

const { filter, where, any, propEq, reject, evolve, pipe, map } = R

const filterLinesBySegments = filter(where({
  segments: any(propEq('name', 'general'))
}))

const filterCustomFromSegments = evolve({
  segments: reject(propEq('name', 'custom'))
})

const fn = pipe(
  filterLinesBySegments,
  map(filterCustomFromSegments),
)

const lines = [{"id":1191,"name":"dev","segments":[]},{"id":1192,"name":"credit","folder":"Embarazadas","segments":[{"name":"general"},{"name":"custom"}]},{"id":1311,"name":"box","segments":[{"name":"custom","line_id":1431,"id":21,"active":true}]},{"id":2000,"name":"sin folder","folder":null,"segments":[{"name":"custom"},{"name":"general"}]},{"id":2000,"name":"credit card","segments":[{"name":"general"}]}]

const result = fn(lines)

console.log(result)
<script src="https://cdnjs.cloudflare.com/ajax/libs/ramda/0.27.0/ramda.js"></script>

Upvotes: 1

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