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How do I get results? [closed]

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I am a beginner in JavaScript and I write the following code, I also write console.log(), and I do not get results, can someone help me and explain to me why I can't get results?
function integers() {
let MyArray;
MyArray = [];
for (let i = 2; i <= 10; i++) {
MyArray.push(i);
}
console.log(MyArray);
}

The javascript functions are not being called automatically. If you need to do so, You can create an auto call function - https://stackoverflow.com/a/10704006/7078456
Or you can manually call your function to get the output of your function.
function integers() {
let myArray = [];
for (let i = 2; i <= 10; i++) {
myArray.push(i);
}
console.log(myArray);
}
integers()

How to search in localstorage for specific word and get entire key and value? [closed]

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On click i created localstorage item "storageKey__list" and value is "example.com"
I need to get all item keys and values ends with "__list" and then get entire key and value.
Result must be:
"storageKey__list , example.com"

You could grab the entries in localStorage using Object.entries() and then use .filter() to obtain only the entires ending in "__list" by using .endsWith():
Object.entries(localStorage).filter(([key]) => key.endsWith('__list'));
Output:
[["storageKey__list", "example.com"]]
A more browser friendly version of the code above could be to use the following:
Object.keys(localStorage).filter(function(key) {
return /__list$/.test(key);
}).map(function(key) {
return [key, localStorage.getItem(key)];
});
Output:
[["storageKey__list", "example.com"]]

Try this:
/** #type {[string, string][]} */
const keyValuePairs = [];
for (let i = 0, l = localStorage.length; i < l; i++) {
const key = localStorage.key(i);
if (key.endsWith("__list"))
keyValuePairs.push([ key, localStorage.getItem(key) ]);
}
console.log(keyValuePairs);

String as a Single value and Array as multiple value handling [closed]

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If I select one value the I am getting value is like
val : "ABC"
But if I select multiple value my val is comming in array
val : ["ABC","DEF"].
Now because of this problem is neighther I can work on for single value nor multiple. Can anybody tell me how to handle this.
eg:
var myObj = {
data : "M1",
val : "Abc"
}
After adding another value it become
var myObj = {
data : "M2",
val : Abc,Def
}

function handleVal(val){
if ("string" === typeof val){
console.log("Do sth with string");
} else if (Array.isArray(val)){
console.log("Do sth with array")
}
}
handleVal("ABC");
handleVal([1,2])

async eachseries how pass var after finish loop [closed]

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I want to pass var number to callback, after loop.
For example Invenotry array has 25 items.
So after this 25 steps I want to pass number into callback (inCb), because I need to check number value.
var number = 0;
async.eachSeries(inventory, function(item, inCb) {
if(sth == othersthm)
{
number++;
}
}, function(numb) {
check number value and do sth
});

You can just use number:
var number = 0;
async.eachSeries(inventory, function(item, inCb) {
if (sth == othersthm) {
number++;
}
}, function() {
//check number value and do sth
console.log(number);
});

How to declare a json object or array collection with variable size in javascript [closed]

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I need to create an array or json that can be filled when detects the counter like an auxiliarJson with variable size but i dont know how can i do it
TypeError: lAttrsPorDia is undefined
lAttrsPorDia[j] = __oATTRS[i];
var lAttrsPorDia;
var j = 0;
for (var i = 0; i < __oATTRS.length; i++) {
if (__oATTRS[i].Dia == counter) {
lAttrsPorDia[j] = __oATTRS[i];
j++;
alert(JSON.stringify(lAttrsPorDia));
}
}

JavaScript arrays already do have variable size:
var arr = [];
arr.push('Hello');