To check if a JavaScript array is empty or not, you can make either of the following checks (depending on your use case): const empty = !Array.isArray(array) || !array.length; const notEmpty = Array.isArray(array
In this tutorial, you will find some built-in methods how to check if an array or object is empty in React JS applications. How to Check if Array or Object is Empty in React Js Here are some built-in methods that allow users to check whether an array or object is empty or not: Me...
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
log(isEmptyObject(bar)); // output: false As you can see, the Object.entries() method converts an object into an array, and we can count the length of that array to check if the object in question is empty. This is very similar to the Object.keys() method and will give the ...
If it returns an empty array, it means the object does not have any enumerable property, which in turn means it is empty.Object.entries(objectToCheck).length === 0You should also make sure the object is actually an object, by checking its constructor is the Object object:...
Takes a path string or array of path strings and returns a Promise. Checks if the given paths are empty and resolves with a boolean indicating if the paths are empty directories. Optionally takes a filter function to filter out files that cause false positives. Also, can take a node-style...
a static method that returns an Array when we pass an object to it, which contains the property names (keys) belonging to that object. We can check whether thelengthof this array is0or higher - denoting whether any keys are present or not. If no keys are present, the object is empty...
An array is a collection of data of the same data types. When performing JavaScript arrays, a common question arises regarding how users can empty an array and clear all the elements. In the following section, we will discuss the multiple ways to check whether a JS array contains the given...
First, and simplest, you can specify a function on the validation array for a property. For example: {email:['email',function(val){returnknex('accounts').where('email','=',val).then(function(resp){if(resp.length>0)thrownewError('The email address is already in use.')})}]} ...
check.array(thing): Returnstrueifthingis an array,falseotherwise. 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,...