Which is the easiest way to convert this: to this: in order to pass it to AJAX data? I’m using VisualSearch and it returns an array of Facet model instances which i need to convert into an Object. Answer think about the array.reduce function everytime you need to perform these kind of transformations. h…
Tag: object
Find and remove objects in an array based on a key value in JavaScript
I have been trying several approaches on how to find an object in an array, where ID = var, and if found, remove the object from the array and return the new array of objects. Data: I’m able to search the array using jQuery $grep; But how can I delete the entire object when id == 88, and return data
How can I remove an element from a list, with lodash?
I have an object that looks like this: I have lodash installed in my application for other things. Is there an efficient way to use lodash to delete the entry: {“subTopicId”:2, “number”:32} from the obj object? Or is there a javascript way to do this? Answer As lyyons pointed out in th…
How do I assign a function to the property of a Javascript object?
I was looking and struggling to the following example: As far as I know player1.logDetails is a property of player1 or a method of player1. So I can’t understand how the author assigns a property to a function. Also I don’t get why you would write it like that instead of : player1.logDetails= play…
Using `this` for Parent Function inside a Nested Function
In the Apple “classs”, how can the nested function countSeeds() retrieve the value this.price? jsfiddle: http://jsfiddle.net/VGqEa/ Output Answer put var self = this at the top of Apple, and then refer to this as self instead in the nested function. i.e.: You could also put the self=this statement…
How to efficiently check if a Key Value pair exists in a Javascript “dictionary” object
Given: How to test if (1, 11) exists? Answer Most of the time very simply, with with one caveat: if the value you are looking for is undefined this will not do because it cannot distinguish between { 1: undefined } and just {}. In that case you need the more verbose test
Sum JavaScript object propertyA values with the same object propertyB in an array of objects
How would one take a JavaScript array of objects, such as and merge duplicate keys by summing the values? In order to get something like this: I have tried iterating and adding to a new array, but this didn’t work: Answer You should be assigning each object not found to the result with its .key property…
What is the best way to define dependent variables in an object?
In the Google developers recommendation for optimizing JavaScript code, they mention that the best way to declare/initialize new variables for object is to use the prototype. For instance, instead of: Use: However, in my case I have a dependency between variables, for instance: Using this.toWhom outside of th…
Push JSON Objects to array in localStorage
I have a function in Javascript: the data parameter is a JSON Object. But everytime I click the button it overwrites the data in my localstorage. Does anybody know how to do this? Answer There are a few steps you need to take to properly store this information in your localStorage. Before we get down to the c…
Javascript reduce() on Object
There is nice Array method reduce() to get one value from the Array. Example: What is the best way to achieve the same with objects? I’d like to do this: However, Object does not seem to have any reduce() method implemented. Answer What you actually want in this case are the Object.values. Here is a con…