There are some combinations of sizes for which deciding the right split requires a little more information as to your priorities for this project.

For example, if @a has 100 elements and @b has 24, then you could split that into 20*4 + 4*5 or 25*4 or 20*5.

Would your priority be for exactly 24 subarrays, at least 24 subarrays or at most 24 subarrays? Either of the latter two are more easily calculated than the first. Which is more appropriate will depend very much upon your application.

For example, when laying out a table, it's generally more aesthetically pleasing to have mostly longer and a few shorter, than mostly shorter and a few longer.

Eg. 100/24

       24 x 5           25 x 4         24 x 5(4)         24 x 5(4)
 1:## ## ## ## ##    ## ## ## ##    ## ## ## ## ##    ## ## ## ## ## 
 2:## ## ## ## ##    ## ## ## ##    ## ## ## ## ##    ## ## ## ## ## 
 3:## ## ## ## ##    ## ## ## ##    ## ## ## ## ##    ## ## ## ## ## 
 4:## ## ## ## ##    ## ## ## ##    ## ## ## ## ##    ## ## ## ## ## 
 5:## ## ## ## ##    ## ## ## ##    ## ## ## ##       ## ## ## ## ##
 6:## ## ## ## ##    ## ## ## ##    ## ## ## ##       ## ## ## ## ##
 7:## ## ## ## ##    ## ## ## ##    ## ## ## ##       ## ## ## ## ##
 8:## ## ## ## ##    ## ## ## ##    ## ## ## ##       ## ## ## ## ##
 9:## ## ## ## ##    ## ## ## ##    ## ## ## ##       ## ## ## ## ##
10:## ## ## ## ##    ## ## ## ##    ## ## ## ##       ## ## ## ## ##
11:## ## ## ## ##    ## ## ## ##    ## ## ## ##       ## ## ## ## ##
12:## ## ## ## ##    ## ## ## ##    ## ## ## ##       ## ## ## ## ##
13:## ## ## ## ##    ## ## ## ##    ## ## ## ##       ## ## ## ## ##
14:## ## ## ## ##    ## ## ## ##    ## ## ## ##       ## ## ## ## ##
15:## ## ## ## ##    ## ## ## ##    ## ## ## ##       ## ## ## ## ##  
+ 
16:## ## ## ## ##    ## ## ## ##    ## ## ## ##       ## ## ## ## ## 
17:## ## ## ## ##    ## ## ## ##    ## ## ## ##       ## ## ## ## ## 
18:## ## ## ## ##    ## ## ## ##    ## ## ## ##       ## ## ## ## ## 
19:## ## ## ## ##    ## ## ## ##    ## ## ## ##       ## ## ## ## ##
20:## ## ## ## ##    ## ## ## ##    ## ## ## ##       ##       
21:                  ## ## ## ##    ## ## ## ##       ##   
22:                  ## ## ## ##    ## ## ## ##       ##   
23:                  ## ## ## ##    ## ## ## ##       ##   
24:                  ## ## ## ##    ## ## ## ##       ##   
25:                  ## ## ## ##

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In reply to Re: Dividing an array into multiple parts by BrowserUk
in thread Dividing an array into multiple parts by tsk1979

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