Lodash is a JavaScript library that works on the top of underscore.js. with pure JavaScript: (although Object.entries is ES7, Object.assign is ES6; but equivalent ES5 uses Object.keys only should be also doable); also notice v != null checks for both null and undefined; How to remove undefined values from array but keep 0 and null , Creates an array with all falsey values removed. Find a solution ... lodash - How to remove undefined values from array but keep 0 and null. Lodash’s modular methods are great for: Iterating arrays, objects, & strings; Manipulating & testing values; Creating composite functions. Sometimes null/empty or undefined values are inserted in the array which are useless. This can be conveniently checked using the logical NOT Why Lodash? JavaScript exercises, practice and solution: Write a JavaScript function to remove null, 0, blank, false, undefined and NaN values from an array. This was the .dropWhile I used: var a2 = _.dropWhile(a, function(o) { return o.CompletedDate == null; }); Now, I know that I can use regular js for this, but I'd like to use lodash if possible. You can remove elements from the end of an array using pop, from the beginning using shift, or from the middle using splice. javascript by Grepper on Nov 06 2019 Donate . I'm a beginner in Lodash and I'm trying to get better. So we need to remove the null, undefined values from array so that it remain good without garbage values. [ 1, 2, 3, undefined, 0, null ] How can I do it cleanly? You do this so that it’s easier to use reject() to eliminate undefined and null values. Sometimes utility libraries are the best way to solve more complex problems. The Lodash Array Remove Method. If all the items in the top level array are arrays then you could lodash's reject with the isEmpty predicate. Lodash is available in a variety of builds & module formats. I want to loop through all objects and remove those that match that condition. If the value is null then returns true otherwise it returns false. Syntax: _.isNull(value) Module Formats. It is an in-place algorithm -does not allocates memory, too bad for the garbage collector-, and it has very good best/average/worst case behaviour. Lodash makes JavaScript easier by taking the hassle out of working with arrays, numbers, objects, strings, etc. A nother method of checking for null is based on the fact that null is falsy, but empty objects are truthy, so null is the only falsy object. Problem Using _.compact lodash to eliminate null values on an array of objects Cathy Rosenbaum posted on 15-12-2020 angularjs lodash angular-google-maps I'm manipulating an array of objects that i get from an http request containing coordinates to create markers in google-maps , but i need to eliminate all the null values in the array. Translate. Remove empty null undefined values from JavaScript Array : There are many ways to remove the null values from the javascript arrays. _.compact([0 The pairs() function turns the input object into an array of key/value arrays. Lodash remove null values from array. 0 In javascript, I want to remove undefined values, but keep the values 0 and null from an array. Instead of a delete method, the JavaScript array has a variety of ways you can clean array values. Lodash helps in working with arrays, strings, objects, numbers, etc. All Languages >> Javascript >> lodash remove null from array “lodash remove null from array” Code Answer . Another way to do it is to take advantage of the length property of the array : pack the non-null items on the 'left' of the array, then reduce the length. The _.isNull() method is used to find whether the value of the object is null. lodash remove undefined values from array . 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