xiaolee. I want to loop through all objects and remove those that match that condition. _.remove(array, [predicate=_.identity]) source npm package. Removes all elements from array that predicate returns truthy for and returns an array of the removed elements. Syntax: _.isNull(value) There is an option to also remove null values. If all the items in the top level array are arrays then you could lodash's reject with the isEmpty predicate. After, you're left with pairs that weren't rejected, and these are input for zipObject(), which reconstructs your object for you. The delete operator is designed to remove properties from JavaScript objects, which arrays are objects. This was the .dropWhile I used: var a2 = _.dropWhile(a, function(o) { return o.CompletedDate == null; }); Find a solution ... lodash - How to remove undefined values from array but keep 0 and null. The lodash remove method helps to make quick work of removing elements from an array if lodash is there to work with, and I suppose it would make sense to use it if it is indeed there. Lodash is a JavaScript library that works on the top of underscore.js. I'm a beginner in Lodash and I'm trying to get better. Lodash helps in working with arrays, strings, objects, numbers, etc. function: This parameter holds … Improve this sample solution and post your code through Disqus JavaScript: Remove null, 0, blank, false, undefined and NaN values a JavaScript function to sort the following array of objects by title value. You do this so that it's easier to use reject() to eliminate undefined and null values. [ 1, 2, 3, undefined, 0, null ] How can I do it cleanly? Now, I know that I can use regular js for this, but I'd like to use lodash if possible. See the Pen JavaScript - Remove null, 0, blank, false, undefined and NaN values from an array - array-ex- 24 by w3resource (@w3resource) on CodePen. In javascript, I want to remove undefined values, but keep the values 0 and null from an array. The pairs() function turns the input object into an array of key/value arrays. If the value is null then returns true otherwise it returns false. The predicate is invoked with three arguments: (value, index, array). _.compact([0 The pairs() function turns the input object into an array of key/value arrays. Remove empty elements from an array in Javascript (20) How do I remove empty elements from an array in JavaScript? javascript - values - remove undefined from array lodash . The reason the element is not actually removed from the array is the delete operator is more about freeing memory than deleting an element. It takes 2 argument, which is the array to remove items from as the first argument, and the array with the values to remove from the array in the first … How to remove undefined and null values from an object using , if you are using lodash, you can use _.compact(array) to remove all falsely values from an array. The _.remove() method is used to remove all elements from the array that predicate returns True and returns the removed elements.. Syntax: _.remove(array, function) Parameters: This method accept two parameters as mentioned above and described below: array: This parameter holds the array that need to be modify. The _.isNull() method is used to find whether the value of the object is null. Note: Unlike _.filter, this method mutates array. Here is the optimized code snippet to remove empty arrays/objects as well: Thanks @Alexis king :) Deletes all empty strings and null values … Translate. You do this so that it’s easier to use reject() to eliminate undefined and null values. 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