So I have been looking and looking online to figure out how to make a two dimensional array. Like I kinda understand a one line linear array. But when I look online all I see is a bunch of code that I don't even understand what each component of the code does. Thanks for whoever answers.
Can you please explain important parts of the code to me and there function.
A multidimensional array is just a special case of an associative array in bash 4:
# Make myarray an associative array
declare -A myarray
# Assign some random value
myarray[3,7]="foo"
# Access it through variables
x=3 y=7
echo "${myarray[$x,$y]}"
It works because "3,7" is just a string like any other. It could just as well have been "warthog" or "ThreeCommaSeven". As long as everything else in your code turns the indices 3 and 7 into the string "3,7", it'll work just like a multidimensional array.
${x[2]} is another array, then bash is not the language for you. It's possible, but it quickly gets ugly, as you have to fake it with indirect parameter expansion and/or eval.
foo. It's 2D because you index it with two integer variables, just like a 2D array in any other language. It's not linear because no bash arrays are ever linear, they're always sparse.If you want to list the elements without knowing in advance their number, a very handy solution:
a=()
a+=( Mexico,2000 )
a+=( Canada,3000 )
for row in ${a[@]};
do
echo place: ${row%%,*} airplanes: ${row##*,}
done
