Search code examples
javascriptarrayslodash

How to check if array contains more than one element?

I would like to ensure that an array contains more then one element and that it is not null nor undefined. With other words: I am looking for an alternative to 

if(array && array.length > 1)

that would be better to read.

Lodash provides a method for checking if an array contains at least one element:

if(_.some(array))

Is there a similar method for checking for several elements?

Unfortunately following methods do not exist:

if(_.several(array))

if(_.many(array))

Would I have to write my own extension method or did I just not find the right lodash command, yet?

Solution

  • You can create own lodash mixin for that:

    var myArray = [1, 2, 3];
var anotherArray = [4];

function several(array) {
  return _.get(array, 'length') > 1
}

_.mixin({ 'several': several });

console.log(_.several(myArray)) // ==> true
console.log(_.several(anotherArray)) // ==> false

    Example: https://jsfiddle.net/ecq7ddey/