Ambient-Oriented Programming

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at:tutorial:basic [2007/04/05 10:02] – elisagat:tutorial:basic [2007/04/05 11:35] – elisag
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 ===== Tables ===== ===== Tables =====
  
-As in Pico, indexed tables represent what other languages call arrays or lists. Tables are unidimensional and their indexes range from 1 to the size of the table. As variables, one can define, assign and refer to a table. Table definition is also made  with the keyword **def** in the following form:+Indexed tables represent what other languages call arrays or lists. Tables are unidimensional and their indexes range from 1 to the size of the table. As variables, one can define, assign and refer to a table. Table definition is also made  with the keyword **def** in the following form:
 <code> <code>
 def t[ <size> ] { <expression> } def t[ <size> ] { <expression> }
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 >>[1, 2, 3, 4, 5] >>[1, 2, 3, 4, 5]
 </code> </code>
-Although there is no special constructor for definition of multidimensional tables, a table entry can contain another table. This is internally stored as a unidimensional table whose entries are other tables. 
  
 +Although there is no special constructor for definition of multidimensional tables, a table entry can contain another table. This is internally stored as a unidimensional table whose entries are other tables.
 <code> <code>
 >def vocals := ["a", "e", "i", "o", "u"] >def vocals := ["a", "e", "i", "o", "u"]
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 </code> </code>
  
-As shown in the definition of the varible "vocals", evaluating a series of comma-separated abstract grammar values between square brackets (aka a tabulation) results in a table.+As shown in the definition of the varible //vocals//, evaluating a series of comma-separated abstract grammar values between square brackets (aka a tabulation) results in a table.
  
 <code> <code>
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 >>25 >>25
 </code> </code>
-This example also illustrates how functions are called. Calls to functions without parameters must also include the parenthesis.+This example also illustrates how functions are called. Calls to functions without parameters must also include the parenthesis as shown below. 
 +<code> 
 +>def f(){nil} 
 +>><closure:f> 
 +>f() 
 +>>nil 
 +</code> 
 +The return value of a function is the result of the last statement executed. Functions must always return a value - i.e. they cannot be abstract. The example also illustrates how to create dumb function that doesn't do anything but returning the //nil// object. 
  
 Functions have access to the enclosing environment of its definition as shown in the following example.   Functions have access to the enclosing environment of its definition as shown in the following example.  
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 >>3 >>3
 </code> </code>
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at/tutorial/basic.txt · Last modified: 2020/02/09 22:05 by elisag