How to delete an object inside list with loop

[mark-piller]

This is just how it works in most programming languages (JavaScript or Java). There is nothing here that we made more difficult.

[mohammad_altoiher]

Array.prototype.filter
will do the same as i understand

[mark-piller]

Not sure if it is the same, but we already support it:

[mohammad_altoiher]

yea i asked about it on my previous replay.

@mohammad_altoiher

will these do the required action? there is no documentation for them.

do you have an example of how to use them?
do i put an if block inside?

[mark-piller]

I do not have an example. @vladimir-upirov, could you assist please?

[vladimir-upirov]

Hello @mohammad_altoiher

The “Filter Items” and “Map Items” blocks just return a new list of items by iterating through this list. The “statement” and “return” inputs will be called for each list’s item.

The only one difference between these blocks is a target result.
Filter Items blocks - returns a new list of the same items when the condition is satisfied for a particular item

// equivalent JS code
const newList = yourList.filter(item => {
  if(condition(item)){
     return true
  }

    return false
})

Map Items blocks - returns a new list of the new items what was passed in “return” input

  // equivalent JS code
  const newList = yourList.map(item => {         
        return {
             foo: item.foo
             bar: item.bar + 123
         }
    })

Take a look at the example:

1. I have a list of Users
2. “mapItems” is a list of objects where persist only two properties: age and email
3. “filterItems” is a list of Users objects where age more than 20

{
    "mapItems": [
        {
            "age": 16,
            "email": "foo@bar.com"
        },
        {
            "age": 25,
            "email": "sss@aaa.com"
        },
        {
            "age": 32,
            "email": "foo@ddddd.ocm"
        }
    ],
    "filterItems": [
        {
            "___jsonclass": "Users",
            "lastLogin": null,
            "userStatus": "ENABLED",
            "created": 1588756389000,
            "ownerId": "7D2BBF7D-D96B-018D-FF47-FEE9DF68A700",
            "socialAccount": "BACKENDLESS",
            "___class": "Users",
            "name": null,
            "blUserLocale": "it",
            "file_ref": null,
            "updated": 1589102330000,
            "email": "sss@aaa.com",
            "objectId": "7D2BBF7D-D96B-018D-FF47-FEE9DF68A700",
            "age": 25
        },
        {
            "___jsonclass": "Users",
            "lastLogin": null,
            "userStatus": "ENABLED",
            "created": 1588756297000,
            "ownerId": "E9A2C320-23BD-0B0B-FF8C-5D6228133000",
            "socialAccount": "BACKENDLESS",
            "___class": "Users",
            "name": null,
            "blUserLocale": "it",
            "file_ref": null,
            "updated": 1589102333000,
            "email": "foo@ddddd.ocm",
            "objectId": "E9A2C320-23BD-0B0B-FF8C-5D6228133000",
            "age": 32
        }
    ]
}

Regards, Vlad

[mohammad_altoiher]

@vladimir-upirov
Thank you so much! this clear things up!

[mohammad_altoiher]

i was able to use the filter block to do what i need instead of two loops and temporary variables!
im happy