list - Compare numbers in a nested file -

example:

let list = [[23, '2'], [2, '3'], [55, '4'], [1, '5']]

i'm trying numeric sort of list (using 1st field): list[indexnr][0]

i've found function in files:

function! mycompare(i1, i2)    return (a:i1 + 0) - (a:i2 + 0) endfunction

how can adapt nested list let work above example?

you have give index params:

function! mycompare(i1, i2)    return a:i1[0] - a:i2[0] endfunction

Ben