By default sort converts the values to strings and compares there Unicode values. For example, 10 would come before 3. In the first example you are overriding the default sort comparison in a way that is correct for numbers.
--- R. Mark Volkmann Object Computing, Inc. > On Oct 21, 2017, at 7:57 AM, Cyril Auburtin <[email protected]> wrote: > > ```js > [0,1,3,4,7,8,8,9,13,17,22,23,26].concat([16,19,21,22,25,32]).sort((a,b)=>a-b) > // [ 0, 1, 3, 4, 7, 8, 8, 9, 13, 16, 17, 19, 21, 22, 22, 23, 25, 26, 32 ] > > [0,1,3,4,7,8,8,9,13,17,22,23,26].concat([16,19,21,22,25,32]).sort() > // [ 0, 1, 13, 16, 17, 19, 21, 22, 22, 23, 25, 26, 3, 32, 4, 7, 8, 8, 9 ] > ``` > In the second case, it produces a weirdly sorted array, on node 8, chrome or > firefox > > What could explain this? > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
