I can sort a table with two pieces of information (the name and a second piece, such as age) with the following code:
t = {
Steve = 4,
Derek = 1,
Mike = 5,
Steph = 10,
Mary = 7,
Danny = 2
}
function pairsByKeys (t,f)
local a = {}
for x in pairs (t) do
a[#a + 1] = x
end
table.sort(a,f)
local i = 0
return function ()
i = i + 1
return a[i], t[a[i]]
end
end
for a,t in pairsByKeys (t) do
print (a,t)
end
Result:
Danny 2
Derek 1
Mary 7
Mike 5
Steph 10
Steve 4
I have a scenario where at a convention each person's name tag contains a barcode. This barcode, when scanned, enters four pieces of information about each person into a table database. This database is made up of the following pieces:
t = {
{name = "Mike", addr = "738 Rose Rd", age = 30, phone = "333-902-6543"}
{name = "Steph", addr = "1010 Mustang Dr", age = 28, phone = "555-842-0606"}
{name = "George", addr = "211 Glass St", age = 34, phone = "111-294-9903"}
}
But how would I change my code to sort all four entries (name, addr, age, phone) by age and keep all variables in line with one another?
I've been trying to experiment and am getting the hang of sorting a table by pairs
and have a better idea how to perform table.sort
. But now I want to take this another step.
Can I please receive some help from one of the programming gurus here?! It is greatly appreciated guys! Thanks!