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Get the first N properties of an Object using Underscore Map


Get the first N properties of an Object using Underscore Map

By : Carlos Mendonca
Date : November 21 2020, 03:00 PM
Any of those help You could get the names of the first 2 keys using keys and first and then use pick to get those keys:
code :
let result = _.pick(input, _.first(_.keys(input), 2 ))


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counting object properties with underscore.js

counting object properties with underscore.js


By : whowhywhere
Date : March 29 2020, 07:55 AM
will help you I'm not an underscore.js user, but I guess _.groupBy() suits this scenario:
code :
var attributes = _.groupBy(list, function (item) {
    return item.data.neighborhood
})
Underscore.js - Iterating over an object and counting object properties

Underscore.js - Iterating over an object and counting object properties


By : Waqas
Date : March 29 2020, 07:55 AM
hop of those help? I have just started to use Underscore.js and would appreciate some advise on how to do the following. I have the following JSON that has been parsed and stored in parsedJson variable: , JS, not CS, but:
code :
_.each(obj.name,function(val){
    if('animation' in val && 'frames' in val.animation) {
        val.animation.frames = _.size(val.frames);
    }
});
Underscore: Remove object having some duplicate properties

Underscore: Remove object having some duplicate properties


By : Danielle
Date : March 29 2020, 07:55 AM
wish help you to fix your issue can somebody help me remove object from array having some duplicate properties. , For example:
code :
_.uniq(data, function(x) { return x.LATITUDE + "/" + x.LONGITUDE })
merge object properties into one array using underscore

merge object properties into one array using underscore


By : honey
Date : March 29 2020, 07:55 AM
help you fix your problem I have following Object.
code :
var _ = require('lodash');
var response = {
  "driving": [{
    "distance": "10,7 km",
    "duration": "28 minutes"
  }, {
    "distance": "9,8 km",
    "duration": "25 minutes"
  }, {
    "distance": "5,8 km",
    "duration": "18 minutes"
  }],
  "walking": [{
    "distance": "10,4 km",
    "duration": "2 heures 10 minutes"
  }, {
    "distance": "9,8 km",
    "duration": "2 heures 2 minutes"
  }, {
    "distance": "5,7 km",
    "duration": "1 heure 11 min"
  }]
}

function customizer(objValue, srcValue) {
  var object = {
    "distance": objValue["distance"],
    "driving": objValue["duration"],
    "walking": srcValue["duration"]
  }
  return object
}

console.log(_.mergeWith(response["driving"], response["walking"], customizer));
Add object with properties prefixed by underscore

Add object with properties prefixed by underscore


By : roldanfritzt
Date : March 29 2020, 07:55 AM
To fix the issue you can do The reason this is ocurring is because AngularFire builtin method $firebaseUtils.toJSON removes some prefixed properties.
I solved my problem adding .toJSON() to my object model.
code :
MyObject.prototype = {
    toJSON: function () {
        return angular.copy(this);
    }
};
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