I want to check if a string matches another string in an array of objects.

Here's my code

let myArr = [{title: "fruits"}, {title: "vegetables"}];
//I want to match a string with the 'title' of the objects 

var str = "string";
if ( myArr[i].title == str) {
    //Do something 
}

I want to check if a string matches another string in an array of objects.

Here's my code

let myArr = [{title: "fruits"}, {title: "vegetables"}];
//I want to match a string with the 'title' of the objects 

var str = "string";
if ( myArr[i].title == str) {
    //Do something 
}

• javascript
• arrays
• javascript-objects

• its let not Let, and what is the value of i ? – Durga Commented Apr 18, 2019 at 10:48
• Just to make this sprint even funnier, do you expect just 'true'/'false' output or index of the matching item(s) within the array or the matching object itself? Are you looking for exact or partial match? – Yevhen Horbunkov Commented Apr 18, 2019 at 11:04
• All most all the answers here working perfectly. – CirLorm Commented Apr 18, 2019 at 11:13

9 Answers 9

First things first. Avoid the capital letter on the Let myVariable is just let myVariable.
Also consider using const instead of let for those variables that aren't going to change :)
Now, to answer your question, you can use the some method. Something like this:

const myArr = [{title: "fruits"}, {title: "vegetables"}];
const str = 'fruits';
console.log('Exist?', myArr.some((obj)=>obj.title===str));
// This will output Exist? true

let myArr = [{ title: "fruits" }, { title: "vegetables" }];
var str = "string";
if (myArr.find(a => a.title == str) != null) {
    console.log('aaa');
}

Using ES6

   let myArr = [{title: "fruits"}, {title: "vegetables"}];
    
    const checkTitle = obj => obj.title === 'fruits';
    
    //check if it is found
    if((myArr.some(checkTitle))){
    //do your stuff here
    console.log("it exists, yay")}

Since you're clearly already using ES6, the most idiomatic way is using Array.includes after mapping the array:

let myArr = [{title: "fruits"}, {title: "vegetables"}];

var str = "string";

let match = myArr.map(obj => obj.title).includes(str);

console.log(match);

You can use -

let match = false
myArr.forEach(function(element){
    if(element.title === str){
        match = true;
    }
});

You can just loop through the array elements and pare them with the str.

var myArr = [{title: "fruits"}, {title: "vegetables"}];
var str = "string";

for (i=0;i<myArr.length;i++){
if (myArr[i].title===str){
console.log(true);
}
else {
console.log(false);

}
}

I am using it in my code and working perfectly from me

var fruitsObj = myArr.find(element => element.title == "fruits")

You will get the object which contains title fruits that is {title: "fruits"} in your case.

I would use Array.prototype.some() or Array.prototype.find() with !! before to turn the value to a boolean:

const myArr = [ { title: 'fruits' }, { title: 'vegetables' } ];

console.log(myArr.some(({ title }) => title === 'fruits'));
console.log(!!myArr.find(({ title }) => title === 'fruits'));

read each title element of the array using for loop -->

let myArr = [{title: "fruits"}, {title: "vegetables"}];

let str = "string";
for(let i=0; i < myArr.length; i++) {
    if (myArr[i].title === str) {
          return true;
    }
}