Looking up data from a file, and storing them as variables - autohotkey

Question

I'm new to autohotkey and I can't figure out how to solve this. Any help is appreciated.
I have list.txt which includes ids and names like this:
list.txt:
123124 - whatever
834019 - sometext
3980 - afjalkfj
I need a function that can do the following
lookup(id, name){
** The function here should lookup for the id inserted
then save ONLY the data related to it in variable x (not the full line)
}
Example
lookup(834019, x)
%x% = sometext
Please help me to do this. Thanks!

Answer 1

What you need in this case are
FileRead to read the file's contents into a variable.
A parsing loop to parse the text of each line.
The StrSplit() function to split the text of each line into an
array of Substrings using the specified Delimiters.
The second parameter (name) is redundant in this case. You can omit it:
x := lookup(834019)
MsgBox, % x
MsgBox, % lookup(3980)
lookup(id) {
FileRead, Contents, list.txt ; read the file's contents into the variable "Contents"
if not ErrorLevel ; Successfully loaded.
{
Loop, parse, Contents, `n, `r ; parse the text of each line
{
word_array1 := StrSplit(A_LoopField," - ").1 ; store the first substring into the variable "word_array1"
word_array1 := Trim(word_array1, " `t") ; trim spaces and tabs in this variable
If (word_array1 = id)
{
name := StrSplit(A_LoopField," - ").2
name := Trim(name, " `t")
return name
}
}
Contents := "" ; Free the memory.
}
else
MsgBox, A problem has been encountered while loading the File Contents
}