I'm wonder how to use switch case on set. Nothing's below is working for me. Any ideas how to fix it?
fruits= Set[]
fruits.add("apple")
fruits.add("lemon")
case fruits
when "apple"
eat
when fruits.include?("lemon")
eat_now
else
not_eat
end
Try this:
fruits = Set["apple", "lemon"]
case "apple"
when fruits
eat
else
not_eat
end
More info you can find here https://ruby-doc.org/stdlib-2.7.1/libdoc/set/rdoc/Set.html#method-i-3D-3D-3D.
Related
I am in quite a pickle right now.
I have a switch that I need to be able to turn on and off every second but I don't really know how I would do that because it needs to be applied on the same bit/function
If currently have a bit that functions as an on/off for a function, the problem is that I need a way for that function to turn itself on and off every 1 second.
I have tried this so far but it is not working for me.
Could anyone try and solve this issue for me please?
{$lua}
if not syntaxcheck then
local On = 1
local Off = 0
local Switch = OnOffController
local function OnOff()
if Switch = Off then
Switch = On
if Switch = On then
Switch = Off
end
end
end
OnOff()
if(Second == nil) then
Second = createTimer(getMainForm())
Second.Interval = 1000
Second.OnTimer = function(timer)
OnOff()
end
end
Second.setEnabled(true)
end
While there could be more wrong, there's definitely an issue with the OnOff() function:
local function OnOff()
if Switch = Off then
Switch = On
if Switch = On then
Switch = Off
end
end
end
The two nested if statements are not going to do what you want. First off, you're using the assignment operator = rather than the equals operator ==. Even if that were correct though the logic has a problem. If Switch is On going into the first if the flow will bypass both. If Switch is Off going into the first if it'll first get changed to On and then immediately hit the second condition and get changed back to Off.
You probably want something more like:
local function OnOff()
if Switch == Off then
Switch = On
else
Switch = Off
end
end
You don't need the second comparison at all assuming Switch can only be true or false.
Other bits of advice I'd give would be to use a boolean type for the Switch variable as that makes it explicit that it can only have two values. You'd probably also want to change its name to something like SwitchedOn or the like to make it obvious what true and false would mean in its context. Likewise a name like ToggleSwitch may make it a bit more obvious what the function presently called OnOff is intended to do.
I've been programming an AI with Lua that you communicate with it in my own logical language. I stumbled across a problem and I can't seem to figure this out.
I'm trying to put y/n questions in. I pretty much said: mi=David la; (sets variable to David. la; is punctuation) la mi=David dor la; (Is 'mi' equal to 'David'?)
When I typed that into it, 'ROBO-DUDE' didn't say anything.
if v == "lol" then
local yes = true
for _,v in pairs(mode[2]) do
if v == false then
print(v)
yes = false
end
print(yes)
end
print(yes)
if yes == true then
things = things .. "jar; "
else
things = things .. "awa; "
end
end
This block of code is in a loop for the 'la' statement. 'dor' means to respond yes/no, the lexer changes it to 'lol'.
When I tested it, the code seemed to skip the dor/lol part of the loop. I went to check the lexer.
if v == "dor" then
sentence[#sentence+1] = "lol"
end
I have no clue what went wrong here. I would like somebody's help on this problem.
Nevermind. I found the problem. When I used a for loop, I used the variable 'v' for the main parser loop and the one that looped through another table/array. I believe changing the variable (any of them) will fix my issue.
I got a few string like so:
TFjyg9780878_867978-DGB097908-78679iuhi698_widesky_light_87689uiyhk
AND
TFjyg9780878_867978-DGB097908-78679iuhi698_sky_light_87689uiyhk
AND
TFjyg9780878_867978-DGB097908-78679iuhi698_widesky_dark_87689uiyhk
AND
TFjyg9780878_867978-DGB097908-78679iuhi698_sky_dark_87689uiyhk
I need to check whether the strings above has one of the widesky_light, sky_light, widesky_dark and sky_dark with exactitude so I wrote this:
if my_string.match("widesky_light")
...
end
For each variant, but the problem I'm having is because sky_light and widesky_light are similar, my code is not working properly. I believe the solution to the above would be a regex, but I've spend the afternoon yesterday trying to get it to work without much success.
Any suggestions?
EDIT
A caveat: in this string (as example): TFjyg9780878_867978-DGB097908-78679iuhi698_widesky_light_87689uiyhk, the part after widesky_light, which is _87689uiyhk is optional, meaning that sometimes I have it, sometimes I don't, so a solution would not be able to count on _string_.
Looks like you just need to reorder your if statements
if my_string.match(/widesky_light/)
return 'something'
end
if my_string.match(/sky_light/)
return 'something'
end
Regex
1st regex : extract word for further checking
Here's a regex which only matches the interesting part :
(?<=_)[a-z_]+(?=(?:_|\b))
It means lowercase word with possible underscore inside, between 2 underscores or after 1 underscore and before a word boundary.
If you need some logic depending on the case (widesky, sky, light or dark), you could use this solution.
Here in action.
2nd regex : direct check if one of 4 words is present
If you just want to know if any of the 4 cases is present :
(?<=_)(?:wide)?sky_(?:dark|light)(?=(?:_|\b))
Here in action, with either _something_after or nothing.
Case statement
list = %w(
TFjyg9780878_867978-DGB097908-78679iuhi698_widesky_light_87689uiyhk
TFjyg9780878_867978-DGB097908-78679iuhi698_sky_light_87689uiyhk
TFjyg9780878_867978-DGB097908-78679iuhi698_widesky_dark_87689uiyhk
TFjyg9780878_867978-DGB097908-78679iuhi698_sky_dark_87689uiyhk
TFjyg9780878_867978-DGB097908-78679iuhi698_trash_dark_87689uiyhk
)
list.each do |string|
case string
when /widesky_light/ then puts "widesky light found!"
when /sky_light/ then puts "sky light found!"
when /widesky_dark/ then puts "widesky dark found!"
when /sky_dark/ then puts "sky dark found!"
else puts "Nothing found!"
end
end
In this order, the case statement should be fine. widesky_dark won't match twice, for example.
Maybe something like this:
case my_string
when /_(sky_light)/
# just sky_light
when /sky_light/
# widesky_light
when /_(sky_dark)/
# just sky_dark
when /sky_dark/
# widesky_dark
else
puts "I don't like"
end
IIF(Col1=1, DAT1, IIF(Col2=1, DAT2, IIF(col3=1, DAT3, IIF(Col4=1, DAT4))))
The above is the informatica piece of code
How do i convert this in oracle
case when col1=1 then data1
else
case when col2=1 then data2)
I have tried something like this.But i am not sure .Please suggest me on how to convert
You don't need multiple, nested CASE statements, one is enough:
CASE
WHEN Col1=1 THEN DAT1
WHEN Col2=1 THEN DAT2
WHEN Col3=1 THEN DAT3
WHEN Col4=1 THEN DAT4
END
I could really use some help with the best way to accomplish the following:
I have the below in my controller (and I know this should not be here and needs to move to the model)
This is an email messaging system so according to what position you hold you are able to email out to set groups of people. So if you are Battalion Commander etc you can choose to message out to one of the 5 groups defined below. If you are a Company Commander your groups change. In the view there is a drop down menu and you choose the group your message goes out to. The select menu is populated depending on the position of the signed in user.
The problem seems that the "elsif" portion does not populate the message correctly. It shows the right drop down list and acts as if the email is sent but the emails are not being populated. However the first value (Battalion Commander) works fine.
Do I have something written incorrectly in the if else statement? It seems like it should be pretty simple. The user position always reflects correctly so that is not it.
if (#position == "Battalion Commander" or "Command Sergeant Major" or "FRSA" or "Battalion FRG Leader")
#bnok = (#user.battalion.primaries).collect(&:email).select{|s| !s.blank?}.join(", ")
#bspouses = (#user.battalion.primaries(:conditions => ["relationship = 'spouse'"])).collect(&:email).select{|s| !s.blank?}.join(", ")
#bsoldiers= (#user.battalion.soldiers).collect(&:email).select{|s| !s.blank?}.join(", ")
#bsoldierspouse=((#user.battalion.soldiers)+(#user.battalion.primaries(:conditions => ["relationship = 'spouse'"]))).collect(&:email).select{|s| !s.blank?}.join(", ")
#ballcontacts=((#user.battalion.soldiers)+(#user.battalion.primaries)+(#user.battalion.additionals)).collect(&:email).select{|s| !s.blank?}.join(", ")
elsif
#position == ("Company Commander" or "First Sergeant" or "FRG Leader")
#nok = (#user.company.primaries).collect(&:email).select{|s| !s.blank?}.join(", ")
#spouses = (#user.company.primaries(:conditions => ["relationship = 'spouse'"])).collect(&:email).select{|s| !s.blank?}.join(", ")
#soldiers= (#user.company.soldiers).collect(&:email).select{|s| !s.blank?}.join(", ")
#soldierspouse=((#user.company.soldiers)+(#user.company.primaries(:conditions => ["relationship = 'spouse'"]))).collect(&:email).select{|s| !s.blank?}.join(", ")
#allcontacts=((#user.company.soldiers)+(#user.company.primaries)+(#user.company.additionals)).collect(&:email).select{|s| !s.blank?}.join(", ")
end
So this does not work, it work for either one set of positions or the other but not both. This correlates to a select menu in the view and depending on what position you hold the query on certain groups of people change.
So in the view I have this:
<% if #position == "Battalion Commander" %>
<%= f.select(:bcc_email, [["Please Select", ""], ["Battalion NOK", #bnok], ["Battalion Spouses", #bspouses], ["Battalion Soldiers Only", #bsoldiers], ["Battalion Soldiers & Spouses", #bsoldierspouse], ["All Battalion Contacts", #ballcontacts]]) %></h1><br />
I am still learning rails and I am not sure if a case statement would be better but then I am confused on where that goes and how that case statement fits into the view.
Any guidance would be great, I am trying to chip away at this and figure it out, but I would really appreciate some help.
Firstly it may help if you can format that a bit clearer - for us and yourself, often simple formatting will help identify issues.
Secondly, what is your goal here? I gather it's some sort of war simulator or something? And assume you realise that in an if statement, only one of them will be executed:
if (xxx)
aaaaaaaaaaaaaaaaaa
elseif (yyyy)
bbbbbbbbbbbbbb
end
in the case that xxx is true, the aaaaaaaa will be executed, and then it'll jump to end. The bbbbbbbbb part will not be executed - even if true, because the first statement was. If however xxx is not true, yyyy will be evaluated, and if true, bbbbbbbbbbbbb will happen.
I hope that helps a bit?
disclaimer: I don't know ruby. I have been told it is similar to python and LISP in some regards, so this answer makes that assumption.
What I would do is maintain these condition variables in a dictionary (or map, or hash table, whatever your language calls it). The "rank" of the person would be a key, and the value would correspond to the function you want to execute for that rank. for instance,
#the following example is python-esque. you'll have to port it to ruby.
def some_funct1(): #pass parameters if you need to. i don't, here.
sql_stuff_here
def some_funct2():
sql_stuff_here
map['important dude'] = some_funct1;
map['another important dude'] = some_funct1;
map['unimportant dude'] = some_funct2;
map['another_unimportant dude'] = some_funct2;
#after some time, you have a person whose rank is rank.
map[rank]() #this will execute the function
You wrote
if (... a big test ...)
..do some work..
elsif
..do something else..
end
but that is wrong! You should just write else instead of elsif unless you need to check another condition.
[I assume elsif followed by nothing=nil is always false]