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
}
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);
Array.prototype.some() or Array.prototype.find() instead.
includes and map more readable because it's clearer what you're doing, .some is more generic and you have to look at the details of the function passed to it to figure out what's going on. Sure in this case it's easy but it's the kind of small "mental tax" that is better to avoid.
.includes - and the overhead of creating a new array with map, as I said, most likely only becomes noticeable with much bigger arrays.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 compare 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;
}
}
letnotLet, and what is the value ofi?