Ambient-Oriented Programming

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at:tutorial:basic [2020/02/09 19:25] – adding elisagat:tutorial:basic [2020/02/09 21:35] – elisag
Line 85: Line 85:
 >>[2, 3, 4] >>[2, 3, 4]
 </code> </code>
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 +
  
 ==== Multidimensional tables ==== ==== Multidimensional tables ====
  
-<code>+As mentioned before, there is no special constructor for definition of multidimensional tables, a table entry can contain another table. In what follows we have a closer look to manipulations with multidimensional tables.  Consider a multidimensional table which is extensionally defined as follows:
  
 +<code>
 def a := [[1,0,0], [0,1,0], [0,0,1]]; def a := [[1,0,0], [0,1,0], [0,0,1]];
 >>[[1, 0, 0], [0, 1, 0], [0, 0, 1]] >>[[1, 0, 0], [0, 1, 0], [0, 0, 1]]
Line 96: Line 106:
 >a[1] >a[1]
 >>[1, 0, 0] >>[1, 0, 0]
 +>(a[1])[2] := 3;
 +>>3
 +>a
 +>>[[1, 3, 0], [0, 1, 0], [0, 0, 1]]
 </code> </code>
  
Line 104: Line 118:
 def aux[3] {0};  def aux[3] {0}; 
 def b[3] { i := i + 1; aux := [0,0,0]; aux[i] :=1; aux}; def b[3] { i := i + 1; aux := [0,0,0]; aux[i] :=1; aux};
 +>>[[1, 0, 0], [0, 1, 0], [0, 0, 1]]
 </code> </code>
 +
 +Finally, we can define a helper function to create matrices as follows:
 +
 +<code>
 +def makeMatrix(n, m := n, init := { |i,j| 0}){
 +  def [i,j] := [0,0];
 +  def makeCol(i,j) {
 +     def col[m] { j := j + 1; init(n,m) }
 +  };
 +  def matrix[n] { i := i + 1; makeCol(i,j)}
 +};
 +def c := makeMatrix(3);
 +>>[[0, 0, 0], [0, 0, 0], [0, 0, 0]]
 +>c[1] := [1,2,3]
 +>>[1, 2, 3]
 +>c
 +>>[[1, 2, 3], [0, 0, 0], [0, 0, 0]]
 +</code>
 +
  
 ===== Functions ===== ===== Functions =====
at/tutorial/basic.txt · Last modified: 2020/02/09 22:05 by elisag