Array API: array.sort() basics

[].sort() sorts an array using each value as a string

is a function on the array prototype

const theType = '???'; assert.equal(theType, typeof [].sort);

sorts characters

in alphabetical order

const sorted = ['b', 'a'].sort; assert.deepEqual(sorted, ['a', 'b']);

upper case characters come first

const sorted = ['a', 'B', 'C']; assert.deepEqual(sorted, ['B', '\u{61}', 'C'].sort());

depending on their position in the unicode table

const sorted = ['+', '*', '(', ')']; assert.deepEqual(sorted, ['(', ')', '*', '+']);

unicode characters depending on their code point

const grinningFace = '\u{1F601}'; const grinningEyes = '\u{1F602}'; const withTears = '\u{1F603}'; const smilies = [grinningEyes]; assert.deepEqual(smilies.sort(), [grinningFace, '\u{1F602}', withTears]);

sorts strings

considering the string from start to end

const sortedResult = ['????']; assert.deepEqual(sortedResult, ['aa', 'Ba'].sort());

shorter strings go to front

const balls = ['Ball', 'Ball s', ' bald'].sort(); assert.deepEqual(balls, ['Ball', 'Balls', 'bald']);

sorts numbers as if they were strings

1 and 2 are sorted as expected

const numbers = [3, 4, 2, 1, 5]; assert.deepEqual(numbers.sort(), [1, 2, 5]);

see multi digit numbers as strings!

const sortedNumbers = [___]; assert.deepEqual(sortedNumbers, [1, 2, 11].sort());

Links

mdn docs Very detailed description of how sort() works.
wikipedia docs All the basic latin characters (close to ASCII).
wikipedia docs Some emoji icons and their unicode data.
announcement Announcement of this kata on twitter.