⚠ Of course, there are a lot more problems with this -- this wouldn't work on checking an empty array because0is considered false. Anyways, TLDR; just useArray.isArray()👍 Doctor's order 👩⚕️ #Problem withinstanceof ...
Vue.JS check if Array,Object or String is empty: In Vue.js, To check if an array is empty in Vue.js, you can use the Array.length property, which returns the number of elements in the array To check if the string is empty in Vue.js, you can use the
constructor === Object; // 👈 constructor check } goodEmptyCheck(new String()); // false ✅ goodEmptyCheck(new Number()); // false ✅ goodEmptyCheck(new Boolean()); // false ✅ goodEmptyCheck(new Array()); // false ✅ goodEmptyCheck(new RegExp()); // false ✅ good...
log('Index : ' + jQuery.inArray("m", text)); Output Index : 4 Index : -1 Index : 5 2) Using Javascript Using Loop The Idea behind it: We can check for the value we need by traversing the entire array using a looping function //code to check if a value exists in an a...
check.emptyArray(thing): Returnstrueifthingis an empty array,falseotherwise. check.nonEmptyArray(thing): Returnstrueifthingis a non-empty array,falseotherwise. check.arrayLike(thing): Returnstrueifthinghas a numeric length property,falseotherwise. ...
Write a JavaScript function to check whether an 'input' is an array or not.Test Data: console.log(is_array('w3resource')); console.log(is_array([1, 2, 4, 0])); false trueSample Solution:JavaScript Code:// Function to check if the input is an array var is_array = function(...
Javascript code for this approach is given below. checkDuplicate(); function checkDuplicate() { let arr = ["abc","xy","bb", "axz", "abc"]; // empty object let map = {}; let result = false; for(let i = 0; i < arr.length; i++) { ...
varSuggestion=$Spelling.DidYouMean(searchString)// "empty" is spelling is ok There is also a$Spelling.ListDictionaries()function which returns an array of all installed dictionaries. Source Code Word to Check: Test Spelling of Word: Get Spelling Suggestions:...
JavaScript Code: // Define a function named first_last_1 with a parameter numsfunctionfirst_last_1(nums){// Calculate the index of the last element in the arrayvarend_pos=nums.length-1;// Check if the first or last element in the array is equal to 1, and return the resultreturnnums...
Write a JavaScript program that returns true if a given number is even, false otherwise, using bitwise operators. Write a JavaScript function that determines evenness by checking the least significant bit of a number. Write a JavaScript program that iterates over an array and filters out odd num...