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check if a variable is array in javascript
// inside if else check
if(Array.isArray(myVarToTest)) {
// myVatToTest is an array
} else {
// myVarToTest is not an array
}
check if is array js
let names=['Jhon','David','Mark'];
console.log(Array.isArray(names));
// true
let user={id:1,name:'David'};
console.log(Array.isArray(user));
// false
let age 18;
console.log(Array.isArray(age));
// false
check if element is array javascript
Array.isArray([]) //true
Array.isArray({}) //false
Array.isArray('') //false
Array.isArray(null) //false
array value check javascript
const names = ["code","codepadding"]
const key = "codepadding";
var have = names.includes(key) // return true / false
if(have){
// do something
}
in javascript check is is an array or not
js check if array
Array.isArray([1, 2, 3]); // true
Array.isArray('asdf'); // false
js check if is array
if(Array.isArray(colors)){
//colors is an array
}
js test if array
if(Array.isArray(myVarToTest)) {
// myVatToTest is an array
} else {
// myVarToTest is not an array
}
js check if a variable is an array
let fruit = 'apple';
let fruits = ["apple", "banana", "mango", "orange", "grapes"];
const isArray = (arr) => Array.isArray(arr);
console.log(isArray.(fruit)); //output - false
console.log(isArray.(fruits)); //output- true
javascript check if array
let variable1 = [2, 3]
let variable2 = "test";
variable1.constructor === Array; // true
variable2.constructor === Array; // false
how to check if array
// Check if something is an Array
// just like you do with "typeof"
Array.isArray([1, 2, 3]); // true
Array.isArray('asdf'); // false
how to check if something is array javascript
function isArray(value) {
return Object.prototype.toString.call(value) === "[object Array]";
}
array check in javascript
const arr = ["name"]
console.log(Array.isArray(arr)); // true
Check if value is array
Method 1: Using the isArray method
Array.isArray(variableName)'
Method 2:
variable instanceof Array
Method 3:
variable.constructor === Array
if array javascript
// I know javascript can be hard but see this example and you will learn
// Javascript if condition and array example
var people = ["filex", "alex", "jon"];
var peopleNeeded = people[1]; // 1 is the index bc the index starts from 0
if (peopleNeeded <= people[1]) {
console.log("alex needed");
} else {
console.log("lol");
}
check if is array javascript
if(Object.prototype.toString.call(someVar) === '[object Array]') {
alert('Array!');
}
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