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 a variable is array in javascript
// inside if else check
if(Array.isArray(myVarToTest)) {
// myVatToTest is an array
} else {
// myVarToTest is not an array
}javascript test if it is an array
// If you want to test if a variable (object) is an instance of
// an array. You can use the Array.isArray(varName) method
// this method takes one argument, the variable or object you want to test
// and returns true, if the argument is an array
// or false, if the argument is not an array
if (Array.isArray(object)) {
// is true
} else {
// is false
}
Array.isArray([1, 2, 3, 4]); // Returns true
Array.isArray(4); // returns false
// this could be used for flattening an array of arrayshow to recognize an array in javascript
const array = [1, 2, 3];
Array.isArray(array); // => true
Array.isArray(object); // => false
Array.isArray(string); // => false
Array.isArray(empty); // => false
// other ways
({}).toString.call(array); // => '[object Array]'
({}).toString.call(object); // => '[object Object]'
({}).toString.call(string); // => '[object String]'
({}).toString.call(empty); // => '[object Null]'Copyright © 2021 Codeinu
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