How can I check if an element exists in array of objects using lodash [duplicate]

Question

Suppose I have the following array:

var users = [
    {id: 3, name: "sally"}
    {id: 5, name: "bob"}
    {id: 40, name: "joe"}
    {id: 67, name: "eve"}
    {id: 168, name: "bob"}
    {id: 269, name: "amanda"}
]

I need to run a loadash function that would return true if, for example name == "bob" exists in the array regardless of how many times it exists in the array.

I would like to know is if there is one function I could use, possible using lodash (not necessarily though) that would return true or false indicating the existence of an object in the target array.

Thanks

This is very unclear. The title for instance says "get true or false", the question only says "return true". Given the array you provide, what is the output you expect? I'm probably not going out on a limb saying you will probably want to use either map or filter. If you just want to know if "bob" is in the array whatsoever, some will work (or _.find) — Dexygen
– Dexygen, Commented Nov 25, 2017 at 0:57
Using native JS: var test = users.some(u => u.name === "bob");. — ibrahim mahrir
– ibrahim mahrir, Commented Nov 25, 2017 at 1:03
@user3808307 See developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/… — Dexygen
– Dexygen, Commented Nov 25, 2017 at 1:09

ztadic91 · Accepted Answer · 2017-11-25 01:12:17Z

2

You can use the filter function to search through your array and find the object with the given name.

var users = [
    {id: 3, name: "sally"},
    {id: 5, name: "bob"},
    {id: 40, name: "joe"},
    {id: 67, name: "eve"},
    {id: 168, name: "bob"},
    {id: 269, name: "amanda"},
];

function find(name) {
    return !!users.find(x => x.name === name);
}

More about the filter function can be found here

edited Nov 25, 2017 at 1:12

answered Nov 25, 2017 at 0:54

ztadic91

2,8041 gold badge17 silver badges21 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

entio Over a year ago

you could add a bit explanation

ztadic91 Over a year ago

@entio explain a bit further please

ztadic91 Over a year ago

@entio i misunderstood your comment, added a link and basic explanation

Collectives™ on Stack Overflow

How can I check if an element exists in array of objects using lodash [duplicate]

1 Answer 1

3 Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Linked

Related