Category: Javascript sort array of objects by key value descending

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Javascript sort array of objects by key value descending

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Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I wonder how can I pass the key on which sort is being performed so I can call the same function every time like so:.

You can see the working example here. Looking at all the answers, I came up with my own solution that works cross-browser. The accepted solution does not work in IE or Safari. Also, the other solutions do not allow for sorting by descending.

Learn more. Sort array on key value Ask Question. Asked 6 years, 11 months ago. Active 1 year, 5 months ago. Viewed 72k times. Toniq Toniq 2, 6 6 gold badges 34 34 silver badges 64 64 bronze badges.

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Javascript, by the looks of it. It's a duplicate question of this : stackoverflow. Active Oldest Votes. String a. String b. KooiInc KooiInc My mistake, your initial answer actually works with numeric sort I just had strings instead of numbers.

My next question is if key value is missing on some array items, how would I place those items on end of the search list? See the edited answer. I would advise to prevent this kind of patching though and before sorting make sure the data to sort is consistent.The sort method sorts the elements of an array in place and returns the sorted array.

The default sort order is ascending, built upon converting the elements into strings, then comparing their sequences of UTF code units values. The source for this interactive example is stored in a GitHub repository. The sorted array. Note that the array is sorted in placeand no copy is made. If compareFunction is not supplied, all non- undefined array elements are sorted by converting them to strings and comparing strings in UTF code units order.

In a numeric sort, 9 comes before 80, but because numbers are converted to strings, "80" comes before "9" in the Unicode order. The value of each code unit is taken separately into account for the comparison. If a and b are two elements being compared, then:. The sort method can be conveniently used with function expressions :. The following example creates four arrays and displays the original array, then the sorted arrays. This example produces the following output.

As the output shows, when a compare function is used, numbers sort correctly whether they are numbers or numeric strings. This function can compare those characters so they appear in the right order. The compareFunction can be invoked multiple times per element within the array. Depending on the compareFunction 's nature, this may yield a high overhead. There is an open source library available called mapsort which applies this approach.

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javascript sort array of objects by key value descending

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Sort Array by attribute

I know about sort a,bbut that only seems to work on strings and numbers. Do I need to add a toString method to my objects? Actually this already answers the question. Below part is written because many people contacted me, complaining that it doesn't work with multiple parameters.

Iterator may also be the string name of the property to sort by eg. As of there is a much shorter and elegant solution. Just use. Explanation: Number will cast true to 1 and false to 0. Instead of using a custom comparison function, you could also create an object type with custom toString method which is invoked by the default comparison function :. If orders is unspecified, all values are sorted in ascending order.

Otherwise, specify an order of "desc" for descending or "asc" for ascending sort order of corresponding values. It's good not to add a framework for every simple piece of logic, but relying on well tested utility frameworks can speed up development and reduce the amount of bugs.

Lodash produces very clean code and promotes a more functional programming style. In one glimpse it becomes clear what the intent of the code is. We will sort the user objects by the nested age property.

Yes, it allows for nested property matching! Want it reversed?The sort order can be either alphabetic or numeric, and either ascending up or descending down. This works well for strings "Apple" comes before "Banana". However, if numbers are sorted as strings, "25" is bigger than "", because "2" is bigger than "1". You can fix this by providing a "compare function" See "Parameter Values" below.

When the sort method compares two values, it sends the values to the compare function, and sorts the values according to the returned negative, zero, positive value. If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail:. HOW TO. Your message has been sent to W3Schools. W3Schools is optimized for learning, testing, and training.

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A function that defines an alternative sort order. Example: When comparing 40 andthe sort method calls the compare function 40, The function calculatesand returns a negative value.

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The sort function will sort 40 as a value lower than Tag: javascriptreactjs. How can I sort my output to champ. Use Array. Ok, you'll want to check out Structuring your application. You'll have to make the file with the definition load earlier, or the one with the fixture later.

First you need to get your timestamps in to Date objects, which is simple using the constructor. Create a separate file called app. The only purpose of this file would be to run the server. You'll also need to export your app object from server. So, your server. Assuming the interval is between 1 and 15 seconds and changed after each interval. Every next interval gets a new time to wait and has to be called again.

The random waiting time As PM suggests, consider using the built—in Array. Presumably you want to sort them on one of start or end: jobs. Referring one of my similar answer here This code: if sortedLetters[i]! You cannot store key-value pair in array. Use object to store key-value pair. See comments inline in the code. EMI and CustomerName are elements under json so you can use. GetElementById "tombolco". This is document. Same with 'none',Rest of your code is fine.

Your call of setTimeout fails in any browser, but in IE9 with an exception what stops the further script-execution. It's a matter of time. Wrap the call You didn't inject module of 'Restangular' service.

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Try like this angular.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. How do I create a function to sort the objects by the price property in ascending or descending order using JavaScript only?

Some documentation can be found here. Here's a more flexible version, which allows you to create reusable sort functions, and sort by any field. To sort it you need to create a comparator function taking two arguments. Then call the sort function with that comparator function as follows:. If you have an ES6 compliant browser you can use:.

The difference between ascending and descending sort order is the sign of the value returned by your compare function:.

javascript sort array of objects by key value descending

You want to sort it in Javascript, right? What you want is the sort function.

javascript sort array of objects by key value descending

In this case you need to write a comparator function and pass it to sortso something like this:. Your comparator takes one of each of the nested hashes inside the array and decides which one is higher by checking the "price" field.

But for now we are going to try this approach Gist: sortBy-old. Let's create a method to sort arrays being able to arrange objects by some property.

Here you can play with the code: jsbin. Thanks to Ozesh by his feedback, the issue related to properties with falsy values was fixed. Use lodash. This could have been achieved through a simple one line valueof sort function.

Run code snippet below to see demo. While I am aware that the OP wanted to sort an array of numbers, this question has been marked as the answer for similar questions regarding strings. To that fact, the above answers do not consider sorting an array of text where casing is important. The requirements that I adhere to are simple:.If you have an array of objects that you need to sort into a certain order, you might be tempted to reach for a JavaScript library.

But before you do, remember that you can do some pretty neat sorting with the native Array. You can get a refresher on that via our extensive collection of ES6 guides. This popular article was updated in November By default, the JavaScript Array. You may be wondering why 32 comes before 5. Not logical, huh?

Well, actually it is. This happens because each element in the array is first converted to a string, and "32" comes before "5" in Unicode order. To avoid this, you can create a new instance of the array to be sorted and modify that instead. This is possible using an array method that returns a copy of the array. For example, Array. Or if you prefer a newer syntax, you can use the spread operator for the same effect:.

Using Array. Thankfully, the function takes an optional compareFunction parameter, which causes the array elements to be sorted according to the return value of the compare function.

We can refactor this a little, as subtracting a from b will also give us the return value:. We can use the following compare function to sort this array of singers according to their band:. To reverse the sorting order, you can invert the return value of the compare function:.

This function has two parameters — the key we want to sort by and the order of the results i. In the code above, the hasOwnProperty method is used to check if the specified property is defined on each object and has not been inherited via the prototype chain.

This allows the function to determine the proper way to sort the array. For example, if the value of the specified property is a stringa toUpperCase method is used to convert all its characters to uppercase, so character casing is ignored when sorting. You can adjust the above function to accommodate other data types, and any other needs your script may have. In our example above, we want to be able to sort an array of objects, whose values are either strings or numbers. This method returns a number indicating whether a string comes before, after, or is the same as a given string in the sort order.

It enables a case-insensitive sort of an array:.

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You can read more about localeCompare over on MDN. So there you have it — a short introduction to sorting an array of objects using vanilla JavaScript. Learn JavaScript, including ES6, from the ground up and put your new knowledge into practice by building along with a range of projects.


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