Array.push() if does not exist?

Question

How can I push into an array if neither values exist? Here is my array:

[     { name: "tom", text: "tasty" },     { name: "tom", text: "tasty" },     { name: "tom", text: "tasty" },     { name: "tom", text: "tasty" },     { name: "tom", text: "tasty" } ] 

If I tried to push again into the array with either name: "tom" or text: "tasty", I don't want anything to happen... but if neither of those are there then I want it to .push()

How can I do this?

Answer 1

For an array of strings (but not an array of objects), you can check if an item exists by calling .indexOf() and if it doesn't then just push the item into the array:

var newItem = "NEW_ITEM_TO_ARRAY";  var array = ["OLD_ITEM_1", "OLD_ITEM_2"];    array.indexOf(newItem) === -1 ? array.push(newItem) : console.log("This item already exists");    console.log(array)

Answer 2

It is quite easy to do using the Array.findIndex function, which takes a function as an argument:

var arrayObj = [{name:"bull", text: "sour"},     { name: "tom", text: "tasty" },     { name: "tom", text: "tasty" } ] var index = arrayObj.findIndex(x => x.name=="bob");  // here you can check specific property for an object whether it exist in your array or not  index === -1 ? arrayObj.push({your_object}) : console.log("object already exists")