js push into array if item exist
if(this.items.indexOf(item) === -1) {
this.items.push(item);
console.log(this.items);
}js push into array if item exist
if(this.items.indexOf(item) === -1) {
this.items.push(item);
console.log(this.items);
}how to check if an element already exists in an array in javascript
function includes(arrayOfArrays, item) {
let array, i, j;
for(i=0; i<arrayOfArrays.length; ++i) {
array = arrayOfArrays[i];
for(j=0; j<array.length; ++j) {
if(array[j] === item) {
return true;
}
}
}
return false;
}Copyright © 2021 Codeinu
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