Difference between revisions of "Select"
From GiderosMobile
(Created page with "__NOTOC__ '''Available since:''' Gideros 2011.6<br/> '''Class:''' (global)<br/> === Description === Returns items in a list. <source lang="lua"> (any) = select(index,...)...") |
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=== Description === | === Description === | ||
Returns items in a list. | Returns items in a list. | ||
| − | < | + | <syntaxhighlight lang="lua"> |
(any) = select(index,...) | (any) = select(index,...) | ||
| − | </ | + | </syntaxhighlight> |
If index is a number, returns all items in the list from that number onwards. Otherwise index must be the string '''"#"''', in which case it returns the number of items in the list. | If index is a number, returns all items in the list from that number onwards. Otherwise index must be the string '''"#"''', in which case it returns the number of items in the list. | ||
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=== Examples === | === Examples === | ||
| − | < | + | <syntaxhighlight lang="lua"> |
function f(...) | function f(...) | ||
print (select ("#", ...)) --> 4 | print (select ("#", ...)) --> 4 | ||
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f("b", "r", 32, "z") | f("b", "r", 32, "z") | ||
| − | </ | + | </syntaxhighlight> |
'''Select a random weapon''' | '''Select a random weapon''' | ||
| − | < | + | <syntaxhighlight lang="lua"> |
local random = math.random | local random = math.random | ||
function choose(...) | function choose(...) | ||
local index = random(select("#", ...)) | local index = random(select("#", ...)) | ||
| − | local result = select(index, ...) -- | + | local result = select(index, ...) -- store only value at index (omitting the other values) |
-- local result = select(random(select("#",...)), ...) -- same as above but in one line | -- local result = select(random(select("#",...)), ...) -- same as above but in one line | ||
return result | return result | ||
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local weapon = choose("pistol", "auto", "falcon", "rpg", "test") | local weapon = choose("pistol", "auto", "falcon", "rpg", "test") | ||
print("random weapon: "..weapon) -- eg. "random weapon: falcon" | print("random weapon: "..weapon) -- eg. "random weapon: falcon" | ||
| − | </ | + | </syntaxhighlight> |
{{(global)}} | {{(global)}} | ||
Latest revision as of 14:32, 13 July 2023
Available since: Gideros 2011.6
Class: (global)
Description
Returns items in a list.
(any) = select(index,...)
If index is a number, returns all items in the list from that number onwards. Otherwise index must be the string "#", in which case it returns the number of items in the list.
Parameters
index: (number or "#") number, all items in the list from that number onwards. "#", number of items in the list
...: (any) the list to process
Examples
function f(...)
print (select ("#", ...)) --> 4
print (select (2, ...)) --> r 32 z
end
f("b", "r", 32, "z")
Select a random weapon
local random = math.random
function choose(...)
local index = random(select("#", ...))
local result = select(index, ...) -- store only value at index (omitting the other values)
-- local result = select(random(select("#",...)), ...) -- same as above but in one line
return result
end
local weapon = choose("pistol", "auto", "falcon", "rpg", "test")
print("random weapon: "..weapon) -- eg. "random weapon: falcon"
