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awful: function: set

Declaration

mixed :set ( mixed &ARG , … )
mixed := ( mixed &ARG , … )

Summary

Takes any number of arguments. Performs an assigment between the rightmost pair of elements, then the second-rightmost, et cetera. Assigns the value of the right element to the left one. Note that references must be used for variable assignments to have effect.
Returns a copy of the value the leftmost argument ended up with.

Assignment rules

The table below contains rules for assigning values. Note that these rules are non-symmetrical; swapping the values may yield a different result. The row contains the type of the first (left) value in pair, while the column contains the type of the second (right) value in pair.

	NIL	bool	bin	float	string	array	dict
NIL	Assignments to NIL values have no effect.
bool	Sets the bool to FALSE.	No type juggling needed.	Bool is turned to TRUE if number is non-zero.	If absolute value of number is greater-or-equal to 1.0, bool becomes TRUE.	If string is `true` or contains a non-zero number, bool becomes TRUE.	Bool is set to TRUE if structure is non-empty.
bin	Sets the number to 0.	Number becomes 1 if bool is TRUE and 0 if it's FALSE.	No type juggling needed.	Float is truncated.	String is converted to number (with regard to base).	Sets the number to amount of entries in structure.
oct
int
hex
float	Float becomes 0.0.	Number becomes 1 if bool is TRUE and 0 if it's FALSE.	Integer part is equal to number, and fraction part is 0.	No type juggling needed.	String is converted to float.	Float is set to number of entries in structure.
string	Empty string.	`TRUE` or `FALSE`.	Text representation of number is put into string. No base-describing prefixes are attached.	Text representation of float is put into string.	No type juggling needed.	`array({X})`, where {X} is the element count.	`dict({X})`, where {X} is the element count.
array	For each element in structure, appropriate assignment is performed.					For elements unset in left structure, their value is copied from the right structure. For elements present in both structures, per-element assignments are performed.
dict

Example

# :set example.
:set &NUM i20
:writeln $NUM
:set &NUM s'1220'
:writeln $NUM

wikipage modified on 2014/0601/2317