deepMove item of array into another path from same obj/array

[crapthings]

any possible to provide such feature?

[crapthings]

better combine 'obj path' with _.index

deepMove(obj, '[0].a.[3]', '[1].b.[6]')

[crapthings]

similar to deepRemove / deepCopy but all can action by path?

deepRemove(obj, '[0].a.[3]')

deepCopy(obj, '[0].a.[3]', '[1].b.[6]')

[YuriGor]

Let me please clarify, do you want this?

.set(obj, targetPath, .get(obj, sourcePath));

[YuriGor]

Or this?

.condenseDeep(.set(obj, targetPath, _.get(obj, sourcePath)));

Note, you should decide what will you do if target path already exists.

[crapthings]

https://github.com/rhalff/dot-object#move-a-property-within-one-object-to-another-location

something like this, but it lacks array support i think.

[YuriGor]

Could you please describe your use cases?

Also how do you see this method should behave in case of:

1. target is object and property exists already by the given path

   var res = _.moveDeep({a:1,b:2}, 'a', 'b');

2. target is array and item exists already by the given path

   var res = _.moveDeep({a:1,b:[2]}, 'a', 'b[0]');

3. target is an array and target path points to the not allocated area of array

   var res = _.moveDeep({a:1,b:[2]}, 'a', 'b[3]');

4. target path go through the not allocated area of some parent array

   var res = _.moveDeep({a:1,b:[2]}, 'a', 'b[3][2].c');

5. target path points to the child

   var res = _.moveDeep({a: {b: {c: 1}}}, 'a', 'a.b.c');

[crapthings]

maybe move a card from kanban?

the data structure is like

[
  {
    randomid,
    type: 'deck',
    children: [
      {
        randomid,
        type: 'group',
        children: [
          {
            randomid,
            type: 'card',
            name: 'card 1',
          },

          {
            randomid,
            type: 'card',
            name: 'card 2',
          },

          {
            randomid,
            type: 'card',
            name: 'card 3',
          },
        ]
      },

      {
        randomid,
        type: 'card',
        name: 'card 7'
      }
    ]
  },

  {
    randomid,
    type: 'deck',
    children: [
      {
        randomid,
        type: 'card',
        name: 'card 4',
      },

      {
        randomid,
        type: 'card',
        name: 'card 5',
      },

      {
        randomid,
        type: 'card',
        name: 'card 6',
      },
    ]
  },
]

like move 'card 5' into 0.children.1.children.2

[crapthings]

these deep method is powerful

https://github.com/YuriGor/deepdash#mapdeep https://github.com/YuriGor/deepdash#index

when you use these with react, mobx

you render the tree deeply and mutate mobx state every thing change,

but sometimes we need something like swap, move, remove kv pair from nested obj or remove element from nested array etc...

[YuriGor]

I think you requested too complicated method with unclear specs. Please think how would you split it Into separate simpler methods. As for me I'd prefer to do such things manually using lodash get, set and native array methods. If you have some repeating usage patterns - it's better to create helper module, or even a separate package related to specific mobx tasks. Thank you for interest, please feel free to open new requests.

[YuriGor]

Just faced with a similar use case and implemented like this:

• take value by fromPath
• delete value at fromPath
• if toPath points to object - put the value there. Developer cares about possible overwriting by himself.
• if toPath points to the array - insert value there, before possible existing array element, so the value will take a position by given index and possible consequent elements will be shifted right. If given index is greater then the length of the array - empty array slots will be preserved.
• if fromPath points to the array - optionally (by default) condense source array to fill the hole possibly left after deletion.
• if fromPath and toPath are both pointing to the same array - then it means that by default target array will be condensed.
• if fromPath does not exist - undefined value will be used without error similar to Lodash get
• if toPath does not exist - it will be created similarly as it will be created by Lodash set method.
• if toPath points to the depths of fromPath - it is the same case when toPath does not exist, because fromPath will be deleted.

So I am going to implement moveDeep as described above. @crapthings, @FunkySamuel37 could you please review the suggested algorithm, if it fits your practice and covers possible edge cases?