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Tricky implementation of two-dimensional array in Bash.

Terminal - Tricky implementation of two-dimensional array in Bash.
arr[i*100+j]="whatever"
2011-02-18 00:47:25
User: RanyAlbeg
9
Tricky implementation of two-dimensional array in Bash.

Since Bash doesn't support two-dimensional arrays, you can limit your columns length by some big enough constant value ( in this example 100 ) and then index the array with i and j, or maybe write your own get() and set() methods to index the array properly like I implemented for example ( see Sample output ).

For example for i=0 and j=0...99 you'll pick up one of 100 elements in the range [0,99] in the one-dimensional array.

For i=1 and j=0...99 you'll pick up one of 100 elements in the range [100,199].

And so on.

Be careful when using this, and remember that in fact you are always using one-dimensional array.

Alternatives

There are 2 alternatives - vote for the best!

Terminal - Alternatives
getarray(){ a=$1;b="${a[$2]}";eval "c=$b";echo "${c[$3]}";return 0;};a[0]="( a b c )";a[1]="( d e f )";getarray a 1 2

Know a better way?

If you can do better, submit your command here.

What others think

what about this:

http://tldp.org/LDP/abs/html/arrays.html

(see Example 27-17. Simulating a two-dimensional array, then tilting it)

Comment by glaudiston 302 weeks ago

Thats ok too.

A two-dimensional array is essentially equivalent to a one-dimensional one, but with additional addressing modes for referencing and manipulating the individual elements by row and column position.

Comment by RanyAlbeg 302 weeks ago

Your point of view

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