CODEWITHSUNDEEP
javascriptunderscore.js
wyc
wyc

Reputation: 55273

How to find an object by part of a string?

I have objects like this inside an array:

{
  "objectId": "566013c860b202595a4b6fd9",
  "createdAt": "2015-12-03T10:04:56.367Z",
},

I'm using Underscore's _.where to find them based on createAt:

var adminsThisMonth = _.where(admins, {createdAt: adminCreatedAt})

Is there any way to find an object only based on one section of createdAt, say, the two digits between the hyphens? (12 in this case).

Upvotes: 0

Views: 103

Answers (4)

Jerome Anthony
Jerome Anthony

Reputation: 8021

Use _.filter() to which you can pass a predicate function to filter the object with any logic you want. 

_.filter(admins, function (obj) {
    return checkConditon(obj.created);
});

Upvotes: 2

Tanase Butcaru
Tanase Butcaru

Reputation: 992

Use plain JS like this:

var admins =[
    {
      "objectId": "566013c860b202595a4b6fd9",
      "createdAt": "2015-12-03T10:04:56.367Z",
    }
]


var checkCreatedAt = (admins.map(function(obj){ return obj.createdAt; }).toString().indexOf("-12-") != -1) ? true : false;

...then you can use checkCreatedAt as you wish.

Upvotes: 1

Martin Schneider
Martin Schneider

Reputation: 3268

Use the Method find, it is similar to where but takes an function as a second parameter. Then use the suggested code from @Tushar inside that function.

_.find(admins, function(admin) { 
    return admin.createdAt.indexOf('-12-') > -1;
});

Upvotes: 1

void
void

Reputation: 36703

var obj = {
  "objectId": "566013c860b202595a4b6fd9",
  "createdAt": "2015-12-03T10:04:56.367Z",
};

if(obj.hasOwnProperty("createdAt") && obj.createdAt.indexOf("-12-")>-1){
   ...
}

Checking first whether it has the key or not and if it has that key then check for the index of -12-

Upvotes: 1

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