Difference between revisions of "Case"
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== Description == | == Description == | ||
| − | Calling case returns a case closure with one defined method, [[case.on|on]]. This closure can stand in place of complicated if-elseif code and functions analogously to the C language switch case construct except that it can be called anywhere once defined. The first parameter passed to the | + | Calling case returns a case closure with one defined method, [[case.on|on]]. This closure can stand in place of complicated if-elseif code and functions analogously to the C language switch case construct except that it can be called anywhere once defined. The first parameter passed to the [[case.on|on]] method selects a function from the initial case table and calls it with the remaining parameters passed through. |
== Alternative Calling Patterns == | == Alternative Calling Patterns == | ||
Revision as of 12:59, 2 November 2010
Contents
Calling Pattern
Call
local c = sl.case(casetable)
Args
casetable is a table, where keys are any type and values are functions
Results
c is a case closure
Closure Methods
Example Usage
local t =
{
[1] = function(...) local a={...} print('a') print(a[a[5] ]) end,
['1'] = function(...) local a={...} print('b') print(a[a[4] ]) end,
bye = function(...) local a={...} print('c') print(a[a[3] ]) end,
default = function(...) local a={...} print('d') print(a[a[2] ]) end,
}
local c = sl.case(t)
local z = 'bye'
c.on(z,2,3,4,5,6)
--> 'c' --> 5
Description
Calling case returns a case closure with one defined method, on. This closure can stand in place of complicated if-elseif code and functions analogously to the C language switch case construct except that it can be called anywhere once defined. The first parameter passed to the on method selects a function from the initial case table and calls it with the remaining parameters passed through.
