Is there a way to check a key existence, in an array with multiple keys? i.e...
set test_arr(n1_temp,x_cell) 3
#As you can see that test_arr contains two keys named n1_temp and x_cell, now I am wondering if I can check the existence of a key named n1_temp
if {[info exists test_arr(n1_temp)] } { ## not working
}
Please help.
-Regards, Shikha
As you can see that test_arr cotains two keys named n1_temp and x_cell
No, it has one key named n1_temp,x_cell.
Use a dict instead, which supports actual multi dimensional structures:
dict set test_dict n1_temp x_cell 3
if {[dict exists $test_dict n1_temp]} {
# ...
}
Your array has one element, called n1_temp,x_cell with a comma in the name.
You can check for whether there is any element with n1_temp in the first part of the name by testing the length of the result list of array names test_arr n1_temp,* (that's a glob match). Be aware that this is an expensive operation in practice, as it has to do a linear scan of all the elements in the array.
if {[llength [array names test_arr n1_temp,*]]} {
puts "There's an n1_temp,* element present"
}