Difference between revisions of "Case"
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| − | ''case | + | == 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 == | ||
| + | |||
| + | * [[case.on]] | ||
| + | |||
| + | == 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, [[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 == | ||
| + | |||
| + | == Upon Error == | ||
== See Also == | == See Also == | ||
* [http://www.easyuo.com/openeuo/wiki/index.php/Simplelib simplelib] | * [http://www.easyuo.com/openeuo/wiki/index.php/Simplelib simplelib] | ||
| + | |||
| + | * [[case.on]] | ||
Revision as of 10:12, 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 [[[case.on|on]] method selects a function from the initial case table and calls it with the remaining parameters passed through.
