Exploring various components within a JavaScript array

I keep a list of names in a file named Ignore.json

[
"George",
"Carl"
]

The filename is ignore.json

Within my program, I load the contents of the file into a variable called ignore

var ignore;

ignore = require("./Ignore.json");

Now, I need to check if an element from an array is not included in that list and output the corresponding code.

I am familiar with how to verify if an element exists in an array using:

for (list in lists) {

        if(!(lists[list].to.toLowerCase() in ignore)){

If I wish to ensure it is not "included" in the list, what is the opposite of 'in' in JavaScript?

javascriptarraysjson

Answer №1

let myList, index;
for(index=0;index<myLists.length;index++){
    myList = myLists[index];
    if(ignoreList.indexOf(myLists[myList].toLowerCase()) === -1){
        // -1 means the item was not found in the list
    }
}

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