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308
ViewsHow to check what does an array contains in React JS?
I have a variable that collects an array of strings and I want to validate like: if the array contains an string with the word "x" then add "y" example:
So I tried do something like: if my "grade/course" is "Prekinder" then add "PE-"+RNG (last one is manually set up) but I got 2 failures this was my attempt:
const register = (e) => {
e.preventDefault();
let id = Math.floor(Math.random() * (99999 + 1));
console.log(grado)
const docId = "fail2";
if (grado.contains == "Prekínder-3" || grado.contains == "Prekínder" || grado.contains == "Kínder"){
docId = `PE-`+id;
}
.......... Some smart code that is not relevant for this
}
Any help/tip/documentation is welcome.
Update This is how I do the input is from a Multi select
<Select className= "SelectMultiple"
placeholder = "Seleccionar..."
options={multipleGrado}
isMulti
required
onChange={setGrados}
and this is how it looks in the firebase
·
Juan Pablo Isaza
1 answers
Answer question0
let a = {
cantidad: 10,
id: "135",
grado: ["prekinder-3", "prekinder", "kinder"],
};
function check(a) {
if (
a.grado.find((element) => {
if (element.includes("inder")) {
return true;
}
})
? true
: false
) {
a.id = "PE-" + a.id;
}
console.log(a);
}
check(a);
hope it will help you. Find will check only one matched element and returns the element. filter will check every element but in your case find will be good I guess. Try yourself and see if you can achieve what you are trying.
·
Juan Pablo Isaza
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