Sort Array of Objects by specific key value | Java

问题:

This question already has answers here:

Sort array of objects by string property value (46 answers)

Sorting in JavaScript: Shouldn't returning a boolean be enough for a comparison function? (2 answers)

Closed 2 years ago.

I'm having trouble sorting a specific array of objects from a small personal project I'm working on. I have never had trouble using the Array.prototype.sort() function before, but I wonder if something about the multiple object keys is affecting it...

Been staring at it for longer than I care to admit and just need to ask for help now. :|

Goal: Sort array of objects alphabetically relative to a specific key.value on each of them.

Thanks in advance!

JS Fiddle Here

Sort function example - (I recommend looking at the full Fiddle for context though).

var sorted = array.sort((a, b) => { return a.key > b.key; });

SOLVED

@Ryan helped me find that returned a boolean isn't enough, you need to explicitly return a positive or negative number, or 0.

@Brk showed me an awesome quick way to do it.

This post has a very detailed description. Sorting in JavaScript: Shouldn't returning a boolean be enough for a comparison function?

Thanks all! Sorry for the duplicate post :|

回答1:

You can use localeCompare method which will returns a number indicating whether a reference string comes before or after or is the same as the given string in sort order.

var sorted = array.sort((a, b) => {
  return a.subreddit.localeCompare(b.subreddit)
});

DEMO