Question

I want to create a list and each element of it is an array, similarly to an array of structs in C language.
Can it be done in TCL and how if it can? thanks very much!

I did some try but it failed…

tcl>set si(eid) -1
tcl>set si(core) 0
tcl>set si(time) 0
tcl>lappend si_list "$si"
Error: can't read "si": variable is array

Answer 1

You can’t create a list of arrays, but you can create a list of dicts which is functionally the same thing (a mapping from keys to values):

set mylist [list [dict create a 1 b 2] [dict create a 4 b 5]]
puts [dict get [lindex $mylist 1] a]

To do it as arrays you need to use [array get] and [array set] to change the array into a string:

set si(eid) -1
set si(core) 0
set si(time) 0
lappend si_list [array get si]

And to get it back out

array set newsi [lindex $si_list]
puts $newsi(eid)

dicts let you work on the {name value} lists directly.