This code is not to be used in a app, it is simply for me to test some values in playground. Why am I not able to print several values within the same statement? My only previous programming knowledge is from python, and in python I believe this was possible with this notation, perhaps in swift it is different?
let array1 = [1,1,1,1,1,1,1,1,1,1,1,1]
let array2 = [2,2,2,2,2,2,2,2,2,2,2,2]
for i in 0...11 {
println(array1[i],\t,array2[i])
}
I want the output in the console to look like this:
1 2
1 2
1 2
etc..
I believe this is what you are looking for:
println("\(array1[i]) \t \(array2[i])")
You can simply use print with multiple arguments.
print(array1[i], "\t", array2[i])
Related
I've been doing research on this and I find a plethora of articles related to Text, but they don't seem to be working for me.
To be clear this formula works, I'm just looking to make it more efficient. My formula looks like:
if [organization_id] = 1 or [organization_id] = 2 or [organization_id] = 3 then "North" else if … where organization_id is of type "WholeNumber"
I'd like to simplify this by doing something like:
if [organization_id] in {1, 2, 3} then "North" else if …
I've tried wrapping in Parenthesis, Braces, & Brackets. Nothing seems to work. Most articles are using some form of text.replace function and mine is just a custom column.
Does MCode within Power Query have any efficiencies like this or do I have to write out each individual statement like the first line?
I've had success with the a List.Contains formulation:
List.Contains({1,2,3}, [organization_id])
The above checks if [organization_id] is in the list supplied in the first argument.
In some cases, you may not want to hardcode a list as shown above but reference a table column instead. For example,
List.Contains(TableWithDesiredIds[id_column], [organization_id])
let intArray = [5]
intArray.allSatisfy{$0<0} //false, of course, but why 2 times?
There is no more operators, as far as I can see...
It's not telling you how many times the block was executed, but rather how many outputs were called on that line. Since the block returns false and the function allSatisfy returns false, that's 2 outputs in 1 line. You'll notice that no matter the size of the array you get the same value, and if you expand the code, i.e.
intArray.allSatisfy {
$0 < 0
}
you don't see 2 times.
Playgrounds doesn't seem to give a counter for executions of closures/functions passed as parameters, rather only for regular for-loops instead.
I wanted to learn more about for loops, as far as I know there are different types?
For instance,
for i = 1, 5 do
print("hello")
end
^ I know about this one, it's going to print hello 5 times, but there are others like the one below which I do not understand, specifically the index bit (does that mean it is number 1?) and what is the ipairs for
for index, 5 in ipairs(x) do
print("hello")
end
If there are any other types please let me know, I want to learn all of them and if you can provide any further reading I'd be more than greatful to check them out
As you can read in the Lua reference manual
3.3.5 For Statement
The for statement has two forms: one numerical and one generic.
The numerical for loop repeats a block of code while a control
variable runs through an arithmetic progression. It has the following
syntax:
stat ::= for Name ‘=’ exp ‘,’ exp [‘,’ exp] do block end
Example:
for i = 1, 3 do
print(i)
end
Will output
1
2
3
You seem familiar with that one. Read the reference manual section for more details.
The generic for statement works over functions, called iterators. On
each iteration, the iterator function is called to produce a new
value, stopping when this new value is nil. The generic for loop has
the following syntax:
stat ::= for namelist in explist do block end namelist ::= Name {‘,’
Name}
Example:
local myTable = {"a", "b", "c"}
for i, v in ipairs(myTable) do
print(i, v)
end
Will ouput
1 a
2 b
3 c
ipairs is one of those iterator functions mentioned:
Returns three values (an iterator function, the table t, and 0) so
that the construction
for i,v in ipairs(t) do body end will iterate over the key–value pairs (1,t[1]), (2,t[2]), ..., up to the first nil value.
Read more about ipairs and pairs here:
https://www.lua.org/manual/5.3/manual.html#pdf-pairs
https://www.lua.org/manual/5.3/manual.html#pdf-ipairs
Of course you can implement your own iterator functions!
Make sure you also read:
Programming in Lua: 7 Iterators and the Generic for
Yes, It will print hello 5 times
According to this answer on Difference between pairs, ipairs, and next?
ipairs does the exact same thing as pairs, but with a slight twist to it.
ipairs runs through the table, until it finds a nil value, or a value that is non-existent, if that makes sense. So, if you ran the script I showed you for pairs, but just replaced pairs with ipairs, it would do the exact same thing
I have wrote this
pp1<-table(sip$newSS4_1 [sip$newSS4_1==1], sip$HS1C1 [sip$newSS4_1==1])
pp1=round(prop.table(pp1,1), digits=3)
pp1
i have 30 variables to do. for example:
pp2<-table(sip$newSS4_2 [sip$newSS4_2==1], sip$HS1C1 [sip$newSS4_2==1])
pp2=round(prop.table(pp2,1), digits=3)
pp2
and pp3...pp30 so on. I havenewSS4_1...newSS4_30in dataframe already.
How to write this in a loop?
Thanks.
It seems like you are making things hard for yourself.
Instead of creating 30 variables with different names, why not use a single list?
Instead of using column names, why not use column numbers?
pp <- list()
colnums <- grep(names(sip), "newSS4_") # assuming they are in order
for (i in 1:30) {
cn <- colnums[i]
pp[[i]] <- table(sip[,cn ] [sip[,cn]==i], sip$HS1C1 [ sip[,cn]==i ])
}
If you really want to have different variables, you can use
assign(paste0("pp", i), value)
to assign to e.g. pp1, pp2, etc.
I'm trying to display total calls from a twilio object as well as unique calls.
The total calls is simple enough:
# set up a client to talk to the Twilio REST API
#sub_account_client = Twilio::REST::Client.new(#account_sid, #auth_token)
#subaccount = #sub_account_client.account
#calls = #subaccount.calls
#total_calls = #calls.list.count
However, I'm really struggling to figure out how to display unique calls (people sometimes call back form the same number and I only want to count calls from the same number once). I'm thinking this is a pretty simple method or two but I've burnt quite a few hours trying to figure it out (still a ruby noob).
Currently I've been working it in the console as follows:
#sub_account_client = Twilio::REST::Client.new(#account_sid, #auth_token)
#subaccount = #sub_account_client.account
#subaccount.calls.list({})each do |call|
#"from" returns the phone number that called
print call.from
end
This returns the following strings:
+13304833615+13304833615+13304833615+13304833615+13304567890+13304833615+13304833615+13304833615
There are only two unique numbers there so I'd like to be able to return '2' for this.
Calling class on that output shows strings. I've used "insert" to add a space then have done a split(" ") to turn them into arrays but the output is the following:
[+13304833615][+13304833615][+13304833615][+13304833615][+13304567890][+13304833615][+13304833615][+13304833615]
I can't call 'uniq' on that and I've tried to 'flatten' as well.
Please enlighten me! Thanks!
If what you have is a string that you want to manipulate the below works:
%{+13304833615+13304833615+13304833615+13304833615+13304567890+13304833615+13304833615+13304833615}.split("+").uniq.reject { |x| x.empty? }.count
=> 2
However this is more ideal:
#subaccount.calls.list({}).map(&:from).uniq.count
Can you build an array directly instead of converting it into a string first? Try something like this perhaps?
#calllist = []
#subaccount.calls.list({})each do |call|
#"from" returns the phone number that called
#calllist.push call.from
end
you should then be able to call uniq on #calllist to shorten it to the unique members.
Edit: What type of object is #subaccount.calls.list anyway?
uniq should work for creating a unique list of strings. I think you may be getting confused by other non-related things. You don't want .split, that's for turning a single string into an array of word strings (default splits by spaces). Which has turned each single number string, into an array containing only that number. You may also have been confused by performing your each call in the irb console, which will return the full array iterated on, even if your inner loop did the right thing. Try the following:
unique_numbers = #subaccount.calls.list({}).map {|call| call.from }.uniq
puts unique_numbers.inspect