Difference between revisions of "Local Variables"
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Var creates the local variable in the current routine and can only be referenced from inside this routine. | Var creates the local variable in the current routine and can only be referenced from inside this routine. | ||
| − | The difference between /var and [[ | + | The difference between /var and [[set]] is that var creates local variable what only exists while script is executed. Set sets value to variable and stores it there until it's [[unset]]. Local variables don't overwrite variables set with "set" command values. |
You can set multible variables with one set | You can set multible variables with one set | ||
var %x = foo, %y = bar | var %x = foo, %y = bar | ||
| − | Usage of = in syntax is optional | + | Usage of = in syntax is usually optional, but highly recommended |
var %x foo | var %x foo | ||
You can use /var -s to make a variable show the result when a value is set. | You can use /var -s to make a variable show the result when a value is set. | ||
| − | == | + | == Examples == |
| − | First, let's create [[Aliases|alias]] | + | First, let's create an [[Aliases|alias]] that's used later on. |
alias var_example { var -s %x foo | set -s %y bar } | alias var_example { var -s %x foo | set -s %y bar } | ||
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set %x 10 | set %x 10 | ||
set %y %x | set %y %x | ||
| − | ; value | + | ; value from %x is copied to %y |
; call of your own alias | ; call of your own alias | ||
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[[echo]] -a %x | [[echo]] -a %x | ||
; returns 10 | ; returns 10 | ||
| − | + | echo -a %y | |
; returns bar | ; returns bar | ||
| − | As we can see, %x still holds | + | As we can see, %x still holds its original value because /var only creates a local variable, but %y was overwritten with /set. |
{{Author|Tovrleaf}} | {{Author|Tovrleaf}} | ||
[[Category:Variables]] | [[Category:Variables]] | ||
Revision as of 16:17, 10 November 2005
Local variables are variables that exist only for the duration of the script in which they are created and can only be accessed from within that script. They can be created with the /var command.
Var creates the local variable in the current routine and can only be referenced from inside this routine.
The difference between /var and set is that var creates local variable what only exists while script is executed. Set sets value to variable and stores it there until it's unset. Local variables don't overwrite variables set with "set" command values.
You can set multible variables with one set
var %x = foo, %y = bar
Usage of = in syntax is usually optional, but highly recommended
var %x foo
You can use /var -s to make a variable show the result when a value is set.
Examples
First, let's create an alias that's used later on.
alias var_example { var -s %x foo | set -s %y bar }
Now, let's play around.
; set values to variables with set so values exists until they're unset set %x 10 set %y %x ; value from %x is copied to %y ; call of your own alias var_example ; displays ; * Set %x to foo ; * Set %y to bar ; now, let's display %x and %y values echo -a %x ; returns 10 echo -a %y ; returns bar
As we can see, %x still holds its original value because /var only creates a local variable, but %y was overwritten with /set.
| Contributed by Tovrleaf |
