Deep filtering in hierarchical object

Question

I have a hierarchical javascript object, which I need to filter out some of its elements. I wonder if there is an easy way to do this.

For example I have an object actions as below. I want to filter out those that have an default property which is set to true.

let actions={
  sql: [
  {
    content: 'aaa',
    default: true
  },
  {
    stmt: 'bbb'
  },
  {
    stmt: 'ccc',
    default: true
  }],
  email: [
  {
    content: 'xxx',
    default: true
  }]
}

So eventually I want to have something like:

let filteredActions={
  sql: [
  {
    stmt: 'bbb'
  }
  ],
  email: []
}

This how I try to solve my problem, but seems it does not work.

getNonDefaultActions = actions =>
  map(actions, (actionListByType, key) => {
    actionListByType.filter(action => !(action.defaultFlag === true))
});

It seems nothing has been filtered. Any solution is welcome. Additionally, if lodash provides something handy for this type of problem that would be great

Answer 1

You can use lodash's _.mapValue() with _.reject():

const actions = {"sql":[{"content":"aaa","default":true},{"stmt":"bbb"},{"stmt":"ccc","default":true}],"email":[{"content":"xxx","default":true}]}

const result = _.mapValues(actions, arr => _.reject(arr, 'default'))

console.log(result)

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