Remove an array from an array of arrays

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I'm totally new to Javascript. I'm working with data from a business database and I want to remove an array from array of arrays.

I have this array of array:

var results = [ [#null, null], ['miglioramento', 30], ['correttiva',45] ];

I want to remove the first array: [#null, null] from results because I want to achieve this array:

results = [ ['miglioramento', 30], ['correttiva',45] ];

How can I do this?

I really thank you in advance!

Assuming the first entry of your array is [null, null] not [#null, null]. This way you are filtering all empty arrays containing only null as entries.

results.filter((arr) => arr.filter((entry) => entry !== null).length);

How to Remove Elements from an Array in JavaScript, How to use length property, delete operator, and pop, shift, and splice methods to remove elements from the end, beginning, and middle of arrays in JavaScript. In fact, we have already discussed that arrays in Java are static so the size of the arrays cannot change once they are instantiated. Thus we cannot delete an element and reduce the array size. So if we want to delete or remove an element from the array, we need to employ different methods that are usually workarounds.

You can use slice function: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/slice

const array = [0, 1, 2, 3]
const slicedArray = array.slice(1)
console.log(slicedArray)
// print : [1, 2, 3]

Removing Duplicate Arrays from an Array of Arrays, What if the array items with potential duplicates were themselves arrays? How will we both identify the duplicate arrays and also remove those duplicates to� Using System.arraycopy () method to delete array element. You can use System.arraycopy () method to remove element from an array in Java. Once you know the index of the element that has to be removed you can call System.arraycopy () method twice, once for copying the element from 0 till the index and then from index + 1 till the end of the array.

create a function to check if an arry is all null then call it inside a filter function.

var results = [
  [null, null],
  ['miglioramento', 30],
  ['correttiva', 45]
];


const checkNull = arr => arr.every(el => el != null);

const res = results.filter(el => checkNull(el));

console.log(res);

9 Ways To Remove 🗑 Elements From A JavaScript Array , Removing & Clearing Items From JavaScript arrays can be confusing. Splice, substring, substr, pop, shift & filter can be used. Learn how they� JavaScript suggests several methods to remove elements from existing Array. You can delete items from the end of an array using pop(), from the beginning using shift(), or from the middle using splice() functions. Let’s discuss them. pop()¶ The Array.prototype.shift() method is used to remove the last element from the array and returns that

For inner arrays with only two elements, you can use .filter() and destructure the elements to check whether one of the elements isn't equal to null. If this is the case, your filter predicate will return true, which will keep the inner array.

const data = [[null, null], ['miglioramento', 30], ['correttiva',45]];

const res = data.filter(([e1, e2]) => e1 !== null || e2 !== null);
console.log(res);

How to delete a value from an array in JavaScript, Using delete creates empty spots. Whatever you do, don't use delete to remove an item from an array. JavaScript language specifies that arrays are sparse, i.e.� Can some please tell me how I can delete/remove an array formula. I received a file that has an array. I need to delete the array, but when I do I get the following alert message. You cannot Change Part of an Array. this is what the formula looks like, only example {=vlookup(..)} I think { } is what is causing the problem.

var results = [ [null, null], ['miglioramento', 30], ['correttiva',45] ]
results.shift()
console.log(results)

modern methods to remove items from arrays in javascript, Array.prototype.shift(). The shift() method removes the first element in an array ( that is the item at the index of zero). It� How To Remove Element From Array In JavaScript? Step 1: Remove Array Elements With the 'Splice' Function Using 'Splice' is the most versatile way to remove an Step 2: Remove Elements from the End of JavaScript Array With pop () The issue with using the Splice command is that you Step 3: Remove

There are a few approaches we can take to remove the duplicate content arrays from our parent array. While we can take a more brute-force approach and compare each array’s contents with every other array’s contents to identify duplicates, we can take another approach and rely on the Set object and its natural ability to filter out duplicate

2:40 To remove an element from the end of the array, I'll type numbers.pop. 2:44 Notice how I'm not passing any arguments to the pop method. 2:51 The pop method does not accept arguments. 2:54 Remember, pop returns the last element after removing it. 2:57 This returns 600 because the value 600 was the last element in the numbers array.

Instead of a delete method, the JavaScript array has a variety of ways you can clean array values. You can remove elements from the end of an array using pop, from the beginning using shift, or from the middle using splice. The JavaScript Array filter method to create a new array with desired items, a more advanced way to remove unwanted elements.

Comments
  • #null is not a valid syntax
  • Does this answer your question? How do I remove a particular element from an array in JavaScript?
  • The # is only to clarification purpose, right?
  • Will that [ null, null ] array always be the first item within the parent array?
  • if you want your result to "achieve this array" then set your result to the array you want...?
  • That will only work when the array of nulls is the first element