I have a structure that looks like this: I can iterate over them in a loop like this: Do I assume correctly that in the cards array I have a couple of objects without names? If so, how can I push more objects like that to the cards array without giving them names? I want to create those objects in
Tag: object
Add property to an array of objects
I have an array of objects as shown below I want to add one more property named Active to each element of this array of Objects. The final outcome should be as follows. Can someone please let me know how to achieve this. Answer You can use the forEach method to execute a provided function once for each element in
How to add key value pair to all objects in an array with lodash
I’m looping through an array of objects, each of which has a nested array of objects: I want to add the same key value pair to all of the objects within the nested array. In other words, all of the objects in item.values should have a new key value pair added, call it newpair. I’d like to clone it. Is
Javascript shorthand to call method if object exists
I have a variable and if that variable is a object I would like to call a method on that object, if not I want to do nothing. I’m wondering if there is any reason why I shouldn’t do it like this. Answer The quick answer is yes, foo && foo.bar() won’t throw an exception if foo is null, and
JavaScript – Store multiple objects in array and access their properties via
So here I have a database of user objects and I would like to push each one into the ‘allUsers’ array. I then want to be able to loop through this array and access a property e.g. allUsers[i].genrePref. How do I push all of these variables into the array to store them like [user, jon, lucy, mike, luke… Answer To
What is the end of prototype chain in JavaScript — null or Object.prototype?
I’ve been reading about the prototype chain in JavaScript and came to two slightly different definitions. It is said that every object in JavaScript has a prototype and that prototype in turn has another prototype. The top prototype (Grand) may also have prototype and the chain can continue. Now the chain will stop at one last object. JavaScript: The Good
How to link a javascript object property to another property of the same object?
Is there a way to link the value of one object property to the value of another? The idea is, that I have something like an excepted interface so I need the propertys.name and .value for my obj. In this special case name is easily constructed from value (value is an array and name is array.toString()) I could use obj.value.toString()
How to iterate (keys, values) in JavaScript? [duplicate]
This question already has answers here: How do I loop through or enumerate a JavaScript object? (48 answers) Closed 12 months ago. I have a dictionary that has the format of How can I iterate through this dictionary by doing something like Answer tl;dr In ECMAScript 2017, just call Object.entries(yourObj). In ECMAScript 2015, it is possible with Maps. In ECMAScript
Does Object.assign() create a deep copy or a shallow copy?
I just came across this concept of which creates a copy of original object into the “copy” object. However, my question is, does this way of cloning object create a deep copy or a shallow copy? PS: The confusion is, if it creates a deep copy, then it would be the easiest way to clone an object. Answer Forget about
Javascript forEach return value interpolated into string
I’m trying to use a forEach iteration on a javascript object, and it seems I cannot interpolate the return value into the string addition. Answer forEach returns undefined. Use map+join.